ffmpeg.c

/*
 * ffmpeg main
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavutil/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavutil/audioconvert.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavformat/os_support.h"

#if CONFIG_AVFILTER
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/vsrc_buffer.h"
#endif

#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif

#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#include <time.h>

#include "cmdutils.h"

#include "libavutil/avassert.h"

const char program_name[] = "ffmpeg";
const int program_birth_year = 2000;

/* select an input stream for an output stream */
typedef struct AVStreamMap {
    int file_index;
    int stream_index;
    int sync_file_index;
    int sync_stream_index;
} AVStreamMap;

/**
 * select an input file for an output file
 */
typedef struct AVMetaDataMap {
    int  file;      //< file index
    char type;      //< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
    int  index;     //< stream/chapter/program number
} AVMetaDataMap;

typedef struct AVChapterMap {
    int in_file;
    int out_file;
} AVChapterMap;

static const OptionDef options[];

#define MAX_FILES 100
#define MAX_STREAMS 1024    /* arbitrary sanity check value */

#define FFM_PACKET_SIZE 4096 //XXX a duplicate of the line in ffm.h

static const char *last_asked_format = NULL;
static int64_t input_files_ts_offset[MAX_FILES];
static double *input_files_ts_scale[MAX_FILES] = {NULL};
static AVCodec **input_codecs = NULL;
static int nb_input_codecs = 0;
static int nb_input_files_ts_scale[MAX_FILES] = {0};

static AVFormatContext *output_files[MAX_FILES];
static AVCodec **output_codecs = NULL;
static int nb_output_files = 0;
static int nb_output_codecs = 0;

static AVStreamMap *stream_maps = NULL;
static int nb_stream_maps;

/* first item specifies output metadata, second is input */
static AVMetaDataMap (*meta_data_maps)[2] = NULL;
static int nb_meta_data_maps;
static int metadata_global_autocopy   = 1;
static int metadata_streams_autocopy  = 1;
static int metadata_chapters_autocopy = 1;

static AVChapterMap *chapter_maps = NULL;
static int nb_chapter_maps;

/* indexed by output file stream index */
static int *streamid_map = NULL;
static int nb_streamid_map = 0;

static int frame_width  = 0;
static int frame_height = 0;
static float frame_aspect_ratio = 0;
static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
static enum AVSampleFormat audio_sample_fmt = AV_SAMPLE_FMT_NONE;
static int max_frames[4] = {INT_MAX, INT_MAX, INT_MAX, INT_MAX};
static AVRational frame_rate;
static float video_qscale = 0;
static uint16_t *intra_matrix = NULL;
static uint16_t *inter_matrix = NULL;
static const char *video_rc_override_string=NULL;
static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
static unsigned int video_codec_tag = 0;
static char *video_language = NULL;
static int same_quality = 0;
static int do_deinterlace = 0;
static int top_field_first = -1;
static int me_threshold = 0;
static int intra_dc_precision = 8;
static int loop_input = 0;
static int loop_output = AVFMT_NOOUTPUTLOOP;
static int qp_hist = 0;
#if CONFIG_AVFILTER
static char *vfilters = NULL;
#endif

static int intra_only = 0;
static int audio_sample_rate = 0;
static int64_t channel_layout = 0;
#define QSCALE_NONE -99999
static float audio_qscale = QSCALE_NONE;
static int audio_disable = 0;
static int audio_channels = 0;
static char  *audio_codec_name = NULL;
static unsigned int audio_codec_tag = 0;
static char *audio_language = NULL;

static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;
static unsigned int subtitle_codec_tag = 0;

static int data_disable = 0;
static char *data_codec_name = NULL;
static unsigned int data_codec_tag = 0;

static float mux_preload= 0.5;
static float mux_max_delay= 0.7;

static int64_t recording_time = INT64_MAX;
static int64_t start_time = 0;
static int64_t recording_timestamp = 0;
static int64_t input_ts_offset = 0;
static int file_overwrite = 0;
static AVDictionary *metadata;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int audio_stream_copy = 0;
static int video_stream_copy = 0;
static int subtitle_stream_copy = 0;
static int data_stream_copy = 0;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
static int copy_ts= 0;
static int copy_tb;
static int opt_shortest = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int opt_programid = 0;
static int copy_initial_nonkeyframes = 0;

static int rate_emu = 0;

static int  video_channel = 0;
static char *video_standard;

static int audio_volume = 256;

static int exit_on_error = 0;
static int using_stdin = 0;
static int verbose = 1;
static int thread_count= 1;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static uint64_t limit_filesize = 0;
static int force_fps = 0;
static char *forced_key_frames = NULL;

static float dts_delta_threshold = 10;

static int64_t timer_start;

static uint8_t *audio_buf;
static uint8_t *audio_out;
static unsigned int allocated_audio_out_size, allocated_audio_buf_size;

static short *samples;

static AVBitStreamFilterContext *video_bitstream_filters=NULL;
static AVBitStreamFilterContext *audio_bitstream_filters=NULL;
static AVBitStreamFilterContext *subtitle_bitstream_filters=NULL;

#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"

struct AVInputStream;

typedef struct AVOutputStream {
    int file_index;          /* file index */
    int index;               /* stream index in the output file */
    int source_index;        /* AVInputStream index */
    AVStream *st;            /* stream in the output file */
    int encoding_needed;     /* true if encoding needed for this stream */
    int frame_number;
    /* input pts and corresponding output pts
       for A/V sync */
    //double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
    struct AVInputStream *sync_ist; /* input stream to sync against */
    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
    AVBitStreamFilterContext *bitstream_filters;
    /* video only */
    int video_resample;
    AVFrame pict_tmp;      /* temporary image for resampling */
    struct SwsContext *img_resample_ctx; /* for image resampling */
    int resample_height;
    int resample_width;
    int resample_pix_fmt;
    AVRational frame_rate;

    float frame_aspect_ratio;

    /* forced key frames */
    int64_t *forced_kf_pts;
    int forced_kf_count;
    int forced_kf_index;

    /* audio only */
    int audio_resample;
    ReSampleContext *resample; /* for audio resampling */
    int resample_sample_fmt;
    int resample_channels;
    int resample_sample_rate;
    int reformat_pair;
    AVAudioConvert *reformat_ctx;
    AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
    FILE *logfile;

#if CONFIG_AVFILTER
    AVFilterContext *output_video_filter;
    AVFilterContext *input_video_filter;
    AVFilterBufferRef *picref;
    char *avfilter;
    AVFilterGraph *graph;
#endif

   int sws_flags;
} AVOutputStream;

static AVOutputStream **output_streams_for_file[MAX_FILES] = { NULL };
static int nb_output_streams_for_file[MAX_FILES] = { 0 };

typedef struct AVInputStream {
    int file_index;
    AVStream *st;
    int discard;             /* true if stream data should be discarded */
    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
    int64_t sample_index;      /* current sample */

    int64_t       start;     /* time when read started */
    int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
                                is not defined */
    int64_t       pts;       /* current pts */
    PtsCorrectionContext pts_ctx;
    int is_start;            /* is 1 at the start and after a discontinuity */
    int showed_multi_packet_warning;
    int is_past_recording_time;
#if CONFIG_AVFILTER
    AVFrame *filter_frame;
    int has_filter_frame;
#endif
} AVInputStream;

typedef struct AVInputFile {
    AVFormatContext *ctx;
    int eof_reached;      /* true if eof reached */
    int ist_index;        /* index of first stream in ist_table */
    int buffer_size;      /* current total buffer size */
} AVInputFile;

static AVInputStream *input_streams = NULL;
static int         nb_input_streams = 0;
static AVInputFile   *input_files   = NULL;
static int         nb_input_files   = 0;

#if CONFIG_AVFILTER

static int configure_video_filters(AVInputStream *ist, AVOutputStream *ost)
{
    AVFilterContext *last_filter, *filter;
    /** filter graph containing all filters including input & output */
    AVCodecContext *codec = ost->st->codec;
    AVCodecContext *icodec = ist->st->codec;
    FFSinkContext ffsink_ctx = { .pix_fmt = codec->pix_fmt };
    AVRational sample_aspect_ratio;
    char args[255];
    int ret;

    ost->graph = avfilter_graph_alloc();

    if (ist->st->sample_aspect_ratio.num){
        sample_aspect_ratio = ist->st->sample_aspect_ratio;
    }else
        sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;

    snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
             ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
             sample_aspect_ratio.num, sample_aspect_ratio.den);

    ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
                                       "src", args, NULL, ost->graph);
    if (ret < 0)
        return ret;
    ret = avfilter_graph_create_filter(&ost->output_video_filter, &ffsink,
                                       "out", NULL, &ffsink_ctx, ost->graph);
    if (ret < 0)
        return ret;
    last_filter = ost->input_video_filter;

    if (codec->width  != icodec->width || codec->height != icodec->height) {
        snprintf(args, 255, "%d:%d:flags=0x%X",
                 codec->width,
                 codec->height,
                 ost->sws_flags);
        if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
                                                NULL, args, NULL, ost->graph)) < 0)
            return ret;
        if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
            return ret;
        last_filter = filter;
    }

    snprintf(args, sizeof(args), "flags=0x%X", ost->sws_flags);
    ost->graph->scale_sws_opts = av_strdup(args);

    if (ost->avfilter) {
        AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
        AVFilterInOut *inputs  = av_malloc(sizeof(AVFilterInOut));

        outputs->name    = av_strdup("in");
        outputs->filter_ctx = last_filter;
        outputs->pad_idx = 0;
        outputs->next    = NULL;

        inputs->name    = av_strdup("out");
        inputs->filter_ctx = ost->output_video_filter;
        inputs->pad_idx = 0;
        inputs->next    = NULL;

        if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
            return ret;
        av_freep(&ost->avfilter);
    } else {
        if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
            return ret;
    }

    if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
        return ret;

    codec->width  = ost->output_video_filter->inputs[0]->w;
    codec->height = ost->output_video_filter->inputs[0]->h;
    codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
        ost->frame_aspect_ratio ? // overriden by the -aspect cli option
        av_d2q(ost->frame_aspect_ratio*codec->height/codec->width, 255) :
        ost->output_video_filter->inputs[0]->sample_aspect_ratio;

    return 0;
}
#endif /* CONFIG_AVFILTER */

static void term_exit(void)
{
    av_log(NULL, AV_LOG_QUIET, "");
}

static volatile int received_sigterm = 0;
static volatile int received_nb_signals = 0;

static void
sigterm_handler(int sig)
{
    received_sigterm = sig;
    received_nb_signals++;
    term_exit();
}

static void term_init(void)
{
    signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).  */
    signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
#ifdef SIGXCPU
    signal(SIGXCPU, sigterm_handler);
#endif
}

static int decode_interrupt_cb(void)
{
    return received_nb_signals > 1;
}

static int ffmpeg_exit(int ret)
{
    int i;

    /* close files */
    for(i=0;i<nb_output_files;i++) {
        AVFormatContext *s = output_files[i];
        if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
            avio_close(s->pb);
        avformat_free_context(s);
        av_free(output_streams_for_file[i]);
    }
    for(i=0;i<nb_input_files;i++) {
        av_close_input_file(input_files[i].ctx);
        av_free(input_files_ts_scale[i]);
    }

    av_free(intra_matrix);
    av_free(inter_matrix);

    if (vstats_file)
        fclose(vstats_file);
    av_free(vstats_filename);

    av_free(streamid_map);
    av_free(input_codecs);
    av_free(output_codecs);
    av_free(stream_maps);
    av_free(meta_data_maps);

    av_freep(&input_streams);
    av_freep(&input_files);

    av_free(video_codec_name);
    av_free(audio_codec_name);
    av_free(subtitle_codec_name);
    av_free(data_codec_name);

    av_free(video_standard);

    uninit_opts();
    av_free(audio_buf);
    av_free(audio_out);
    allocated_audio_buf_size= allocated_audio_out_size= 0;
    av_free(samples);

#if CONFIG_AVFILTER
    avfilter_uninit();
#endif

    if (received_sigterm) {
        fprintf(stderr,
            "Received signal %d: terminating.\n",
            (int) received_sigterm);
        exit (255);
    }

    exit(ret); /* not all OS-es handle main() return value */
    return ret;
}

/* similar to ff_dynarray_add() and av_fast_realloc() */
static void *grow_array(void *array, int elem_size, int *size, int new_size)
{
    if (new_size >= INT_MAX / elem_size) {
        fprintf(stderr, "Array too big.\n");
        ffmpeg_exit(1);
    }
    if (*size < new_size) {
        uint8_t *tmp = av_realloc(array, new_size*elem_size);
        if (!tmp) {
            fprintf(stderr, "Could not alloc buffer.\n");
            ffmpeg_exit(1);
        }
        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
        *size = new_size;
        return tmp;
    }
    return array;
}

static void choose_sample_fmt(AVStream *st, AVCodec *codec)
{
    if(codec && codec->sample_fmts){
        const enum AVSampleFormat *p= codec->sample_fmts;
        for(; *p!=-1; p++){
            if(*p == st->codec->sample_fmt)
                break;
        }
        if (*p == -1) {
            av_log(NULL, AV_LOG_WARNING,
                   "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
                   av_get_sample_fmt_name(st->codec->sample_fmt),
                   codec->name,
                   av_get_sample_fmt_name(codec->sample_fmts[0]));
            st->codec->sample_fmt = codec->sample_fmts[0];
        }
    }
}

/**
 * Update the requested input sample format based on the output sample format.
 * This is currently only used to request float output from decoders which
 * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
 * Ideally this will be removed in the future when decoders do not do format
 * conversion and only output in their native format.
 */
static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
                              AVCodecContext *enc)
{
    /* if sample formats match or a decoder sample format has already been
       requested, just return */
    if (enc->sample_fmt == dec->sample_fmt ||
        dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
        return;

    /* if decoder supports more than one output format */
    if (dec_codec && dec_codec->sample_fmts &&
        dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
        dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
        const enum AVSampleFormat *p;
        int min_dec = -1, min_inc = -1;

        /* find a matching sample format in the encoder */
        for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
            if (*p == enc->sample_fmt) {
                dec->request_sample_fmt = *p;
                return;
            } else if (*p > enc->sample_fmt) {
                min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
            } else
                min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
        }

        /* if none match, provide the one that matches quality closest */
        dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
                                  enc->sample_fmt - min_dec;
    }
}

static void choose_sample_rate(AVStream *st, AVCodec *codec)
{
    if(codec && codec->supported_samplerates){
        const int *p= codec->supported_samplerates;
        int best=0;
        int best_dist=INT_MAX;
        for(; *p; p++){
            int dist= abs(st->codec->sample_rate - *p);
            if(dist < best_dist){
                best_dist= dist;
                best= *p;
            }
        }
        if(best_dist){
            av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
        }
        st->codec->sample_rate= best;
    }
}

static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
{
    if(codec && codec->pix_fmts){
        const enum PixelFormat *p= codec->pix_fmts;
        if(st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL){
            if(st->codec->codec_id==CODEC_ID_MJPEG){
                p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE};
            }else if(st->codec->codec_id==CODEC_ID_LJPEG){
                p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE};
            }
        }
        for(; *p!=-1; p++){
            if(*p == st->codec->pix_fmt)
                break;
        }
        if (*p == -1) {
            if(st->codec->pix_fmt != PIX_FMT_NONE)
                av_log(NULL, AV_LOG_WARNING,
                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
                        av_pix_fmt_descriptors[st->codec->pix_fmt].name,
                        codec->name,
                        av_pix_fmt_descriptors[codec->pix_fmts[0]].name);
            st->codec->pix_fmt = codec->pix_fmts[0];
        }
    }
}

static AVOutputStream *new_output_stream(AVFormatContext *oc, int file_idx)
{
    int idx = oc->nb_streams - 1;
    AVOutputStream *ost;

    output_streams_for_file[file_idx] =
        grow_array(output_streams_for_file[file_idx],
                   sizeof(*output_streams_for_file[file_idx]),
                   &nb_output_streams_for_file[file_idx],
                   oc->nb_streams);
    ost = output_streams_for_file[file_idx][idx] =
        av_mallocz(sizeof(AVOutputStream));
    if (!ost) {
        fprintf(stderr, "Could not alloc output stream\n");
        ffmpeg_exit(1);
    }
    ost->file_index = file_idx;
    ost->index = idx;

    ost->sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
    return ost;
}

static int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
    int i, err;
    AVFormatContext *ic;
    int nopts = 0;

    err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
    if (err < 0)
        return err;
    /* copy stream format */
    s->nb_streams = 0;
    s->streams = av_mallocz(sizeof(AVStream *) * ic->nb_streams);
    for(i=0;i<ic->nb_streams;i++) {
        AVStream *st;
        AVCodec *codec;

        s->nb_streams++;

        // FIXME: a more elegant solution is needed
        st = av_mallocz(sizeof(AVStream));
        memcpy(st, ic->streams[i], sizeof(AVStream));
        st->info = NULL;
        st->codec = avcodec_alloc_context();
        if (!st->codec) {
            print_error(filename, AVERROR(ENOMEM));
            ffmpeg_exit(1);
        }
        avcodec_copy_context(st->codec, ic->streams[i]->codec);
        s->streams[i] = st;

        codec = avcodec_find_encoder(st->codec->codec_id);
        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
            if (audio_stream_copy) {
                st->stream_copy = 1;
            } else
                choose_sample_fmt(st, codec);
        } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
            if (video_stream_copy) {
                st->stream_copy = 1;
            } else
                choose_pixel_fmt(st, codec);
        }

        if(st->codec->flags & CODEC_FLAG_BITEXACT)
            nopts = 1;

        new_output_stream(s, nb_output_files);
    }

    if (!nopts)
        s->timestamp = av_gettime();

    av_close_input_file(ic);
    return 0;
}

static double
get_sync_ipts(const AVOutputStream *ost)
{
    const AVInputStream *ist = ost->sync_ist;
    return (double)(ist->pts - start_time)/AV_TIME_BASE;
}

static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
    int ret;

    while(bsfc){
        AVPacket new_pkt= *pkt;
        int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
                                          &new_pkt.data, &new_pkt.size,
                                          pkt->data, pkt->size,
                                          pkt->flags & AV_PKT_FLAG_KEY);
        if(a>0){
            av_free_packet(pkt);
            new_pkt.destruct= av_destruct_packet;
        } else if(a<0){
            fprintf(stderr, "%s failed for stream %d, codec %s",
                    bsfc->filter->name, pkt->stream_index,
                    avctx->codec ? avctx->codec->name : "copy");
            print_error("", a);
            if (exit_on_error)
                ffmpeg_exit(1);
        }
        *pkt= new_pkt;

        bsfc= bsfc->next;
    }

    ret= av_interleaved_write_frame(s, pkt);
    if(ret < 0){
        print_error("av_interleaved_write_frame()", ret);
        ffmpeg_exit(1);
    }
}

#define MAX_AUDIO_PACKET_SIZE (128 * 1024)

static void do_audio_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         unsigned char *buf, int size)
{
    uint8_t *buftmp;
    int64_t audio_out_size, audio_buf_size;
    int64_t allocated_for_size= size;

    int size_out, frame_bytes, ret, resample_changed;
    AVCodecContext *enc= ost->st->codec;
    AVCodecContext *dec= ist->st->codec;
    int osize= av_get_bits_per_sample_fmt(enc->sample_fmt)/8;
    int isize= av_get_bits_per_sample_fmt(dec->sample_fmt)/8;
    const int coded_bps = av_get_bits_per_sample(enc->codec->id);

need_realloc:
    audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);
    audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;
    audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API
    audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);
    audio_buf_size*= osize*enc->channels;

    audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
    if(coded_bps > 8*osize)
        audio_out_size= audio_out_size * coded_bps / (8*osize);
    audio_out_size += FF_MIN_BUFFER_SIZE;

    if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
        fprintf(stderr, "Buffer sizes too large\n");
        ffmpeg_exit(1);
    }

    av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
    av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
    if (!audio_buf || !audio_out){
        fprintf(stderr, "Out of memory in do_audio_out\n");
        ffmpeg_exit(1);
    }

    if (enc->channels != dec->channels || enc->sample_rate != dec->sample_rate)
        ost->audio_resample = 1;

    resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
                       ost->resample_channels    != dec->channels   ||
                       ost->resample_sample_rate != dec->sample_rate;

    if ((ost->audio_resample && !ost->resample) || resample_changed) {
        if (resample_changed) {
            av_log(NULL, AV_LOG_INFO, "Input stream #%d.%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
                   ist->file_index, ist->st->index,
                   ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
                   dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
            ost->resample_sample_fmt  = dec->sample_fmt;
            ost->resample_channels    = dec->channels;
            ost->resample_sample_rate = dec->sample_rate;
            if (ost->resample)
                audio_resample_close(ost->resample);
        }
        /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
        if (audio_sync_method <= 1 &&
            ost->resample_sample_fmt  == enc->sample_fmt &&
            ost->resample_channels    == enc->channels   &&
            ost->resample_sample_rate == enc->sample_rate) {
            ost->resample = NULL;
            ost->audio_resample = 0;
        } else if (ost->audio_resample) {
            if (dec->sample_fmt != AV_SAMPLE_FMT_S16)
                fprintf(stderr, "Warning, using s16 intermediate sample format for resampling\n");
            ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
                                                   enc->sample_rate, dec->sample_rate,
                                                   enc->sample_fmt,  dec->sample_fmt,
                                                   16, 10, 0, 0.8);
            if (!ost->resample) {
                fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
                        dec->channels, dec->sample_rate,
                        enc->channels, enc->sample_rate);
                ffmpeg_exit(1);
            }
        }
    }

#define MAKE_SFMT_PAIR(a,b) ((a)+AV_SAMPLE_FMT_NB*(b))
    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&
        MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
        if (ost->reformat_ctx)
            av_audio_convert_free(ost->reformat_ctx);
        ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
                                                   dec->sample_fmt, 1, NULL, 0);
        if (!ost->reformat_ctx) {
            fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
                av_get_sample_fmt_name(dec->sample_fmt),
                av_get_sample_fmt_name(enc->sample_fmt));
            ffmpeg_exit(1);
        }
        ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
    }

    if(audio_sync_method){
        double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
                - av_fifo_size(ost->fifo)/(enc->channels * 2);
        double idelta= delta*dec->sample_rate / enc->sample_rate;
        int byte_delta= ((int)idelta)*2*dec->channels;

        //FIXME resample delay
        if(fabs(delta) > 50){
            if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
                if(byte_delta < 0){
                    byte_delta= FFMAX(byte_delta, -size);
                    size += byte_delta;
                    buf  -= byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "discarding %d audio samples\n", (int)-delta);
                    if(!size)
                        return;
                    ist->is_start=0;
                }else{
                    static uint8_t *input_tmp= NULL;
                    input_tmp= av_realloc(input_tmp, byte_delta + size);

                    if(byte_delta > allocated_for_size - size){
                        allocated_for_size= byte_delta + (int64_t)size;
                        goto need_realloc;
                    }
                    ist->is_start=0;

                    memset(input_tmp, 0, byte_delta);
                    memcpy(input_tmp + byte_delta, buf, size);
                    buf= input_tmp;
                    size += byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
                }
            }else if(audio_sync_method>1){
                int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
                av_assert0(ost->audio_resample);
                if(verbose > 2)
                    fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);
//                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
                av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
            }
        }
    }else
        ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
                        - av_fifo_size(ost->fifo)/(enc->channels * 2); //FIXME wrong

    if (ost->audio_resample) {
        buftmp = audio_buf;
        size_out = audio_resample(ost->resample,
                                  (short *)buftmp, (short *)buf,
                                  size / (dec->channels * isize));
        size_out = size_out * enc->channels * osize;
    } else {
        buftmp = buf;
        size_out = size;
    }

    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {
        const void *ibuf[6]= {buftmp};
        void *obuf[6]= {audio_buf};
        int istride[6]= {isize};
        int ostride[6]= {osize};
        int len= size_out/istride[0];
        if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
            printf("av_audio_convert() failed\n");
            if (exit_on_error)
                ffmpeg_exit(1);
            return;
        }
        buftmp = audio_buf;
        size_out = len*osize;
    }

    /* now encode as many frames as possible */
    if (enc->frame_size > 1) {
        /* output resampled raw samples */
        if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
            fprintf(stderr, "av_fifo_realloc2() failed\n");
            ffmpeg_exit(1);
        }
        av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);

        frame_bytes = enc->frame_size * osize * enc->channels;

        while (av_fifo_size(ost->fifo) >= frame_bytes) {
            AVPacket pkt;
            av_init_packet(&pkt);

            av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);

            //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()

            ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
                                       (short *)audio_buf);
            if (ret < 0) {
                fprintf(stderr, "Audio encoding failed\n");
                ffmpeg_exit(1);
            }
            audio_size += ret;
            pkt.stream_index= ost->index;
            pkt.data= audio_out;
            pkt.size= ret;
            if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
            pkt.flags |= AV_PKT_FLAG_KEY;
            write_frame(s, &pkt, enc, ost->bitstream_filters);

            ost->sync_opts += enc->frame_size;
        }
    } else {
        AVPacket pkt;
        av_init_packet(&pkt);

        ost->sync_opts += size_out / (osize * enc->channels);

        /* output a pcm frame */
        /* determine the size of the coded buffer */
        size_out /= osize;
        if (coded_bps)
            size_out = size_out*coded_bps/8;

        if(size_out > audio_out_size){
            fprintf(stderr, "Internal error, buffer size too small\n");
            ffmpeg_exit(1);
        }

        //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
        ret = avcodec_encode_audio(enc, audio_out, size_out,
                                   (short *)buftmp);
        if (ret < 0) {
            fprintf(stderr, "Audio encoding failed\n");
            ffmpeg_exit(1);
        }
        audio_size += ret;
        pkt.stream_index= ost->index;
        pkt.data= audio_out;
        pkt.size= ret;
        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
        pkt.flags |= AV_PKT_FLAG_KEY;
        write_frame(s, &pkt, enc, ost->bitstream_filters);
    }
}

static void pre_process_video_frame(AVInputStream *ist, AVPicture *picture, void **bufp)
{
    AVCodecContext *dec;
    AVPicture *picture2;
    AVPicture picture_tmp;
    uint8_t *buf = 0;

    dec = ist->st->codec;

    /* deinterlace : must be done before any resize */
    if (do_deinterlace) {
        int size;

        /* create temporary picture */
        size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
        buf = av_malloc(size);
        if (!buf)
            return;

        picture2 = &picture_tmp;
        avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);

        if(avpicture_deinterlace(picture2, picture,
                                 dec->pix_fmt, dec->width, dec->height) < 0) {
            /* if error, do not deinterlace */
            fprintf(stderr, "Deinterlacing failed\n");
            av_free(buf);
            buf = NULL;
            picture2 = picture;
        }
    } else {
        picture2 = picture;
    }

    if (picture != picture2)
        *picture = *picture2;
    *bufp = buf;
}

/* we begin to correct av delay at this threshold */
#define AV_DELAY_MAX 0.100

static void do_subtitle_out(AVFormatContext *s,
                            AVOutputStream *ost,
                            AVInputStream *ist,
                            AVSubtitle *sub,
                            int64_t pts)
{
    static uint8_t *subtitle_out = NULL;
    int subtitle_out_max_size = 1024 * 1024;
    int subtitle_out_size, nb, i;
    AVCodecContext *enc;
    AVPacket pkt;

    if (pts == AV_NOPTS_VALUE) {
        fprintf(stderr, "Subtitle packets must have a pts\n");
        if (exit_on_error)
            ffmpeg_exit(1);
        return;
    }

    enc = ost->st->codec;

    if (!subtitle_out) {
        subtitle_out = av_malloc(subtitle_out_max_size);
    }

    /* Note: DVB subtitle need one packet to draw them and one other
       packet to clear them */
    /* XXX: signal it in the codec context ? */
    if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
        nb = 2;
    else
        nb = 1;

    for(i = 0; i < nb; i++) {
        sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
        // start_display_time is required to be 0
        sub->pts              += av_rescale_q(sub->start_display_time, (AVRational){1, 1000}, AV_TIME_BASE_Q);
        sub->end_display_time -= sub->start_display_time;
        sub->start_display_time = 0;
        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
                                                    subtitle_out_max_size, sub);
        if (subtitle_out_size < 0) {
            fprintf(stderr, "Subtitle encoding failed\n");
            ffmpeg_exit(1);
        }

        av_init_packet(&pkt);
        pkt.stream_index = ost->index;
        pkt.data = subtitle_out;
        pkt.size = subtitle_out_size;
        pkt.pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
        if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
            /* XXX: the pts correction is handled here. Maybe handling
               it in the codec would be better */
            if (i == 0)
                pkt.pts += 90 * sub->start_display_time;
            else
                pkt.pts += 90 * sub->end_display_time;
        }
        write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
    }
}

static int bit_buffer_size= 1024*256;
static uint8_t *bit_buffer= NULL;

static void do_video_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         AVFrame *in_picture,
                         int *frame_size)
{
    int nb_frames, i, ret, resample_changed;
    AVFrame *final_picture, *formatted_picture;
    AVCodecContext *enc, *dec;
    double sync_ipts;

    enc = ost->st->codec;
    dec = ist->st->codec;

    sync_ipts = get_sync_ipts(ost) / av_q2d(enc->time_base);

    /* by default, we output a single frame */
    nb_frames = 1;

    *frame_size = 0;

    if(video_sync_method){
        double vdelta = sync_ipts - ost->sync_opts;
        //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
        if (vdelta < -1.1)
            nb_frames = 0;
        else if (video_sync_method == 2 || (video_sync_method<0 && (s->oformat->flags & AVFMT_VARIABLE_FPS))){
            if(vdelta<=-0.6){
                nb_frames=0;
            }else if(vdelta>0.6)
                ost->sync_opts= lrintf(sync_ipts);
        }else if (vdelta > 1.1)
            nb_frames = lrintf(vdelta);
//fprintf(stderr, "vdelta:%f, ost->sync_opts:%"PRId64", ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, get_sync_ipts(ost), nb_frames);
        if (nb_frames == 0){
            ++nb_frames_drop;
            if (verbose>2)
                fprintf(stderr, "*** drop!\n");
        }else if (nb_frames > 1) {
            nb_frames_dup += nb_frames - 1;
            if (verbose>2)
                fprintf(stderr, "*** %d dup!\n", nb_frames-1);
        }
    }else
        ost->sync_opts= lrintf(sync_ipts);

    nb_frames= FFMIN(nb_frames, max_frames[AVMEDIA_TYPE_VIDEO] - ost->frame_number);
    if (nb_frames <= 0)
        return;

    formatted_picture = in_picture;
    final_picture = formatted_picture;

    resample_changed = ost->resample_width   != dec->width  ||
                       ost->resample_height  != dec->height ||
                       ost->resample_pix_fmt != dec->pix_fmt;

    if (resample_changed) {
        av_log(NULL, AV_LOG_INFO,
               "Input stream #%d.%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
               ist->file_index, ist->st->index,
               ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
               dec->width         , dec->height         , av_get_pix_fmt_name(dec->pix_fmt));
        if(!ost->video_resample)
            ffmpeg_exit(1);
    }

#if !CONFIG_AVFILTER
    if (ost->video_resample) {
        final_picture = &ost->pict_tmp;
        if (resample_changed) {
            /* initialize a new scaler context */
            sws_freeContext(ost->img_resample_ctx);
            ost->img_resample_ctx = sws_getContext(
                ist->st->codec->width,
                ist->st->codec->height,
                ist->st->codec->pix_fmt,
                ost->st->codec->width,
                ost->st->codec->height,
                ost->st->codec->pix_fmt,
                ost->sws_flags, NULL, NULL, NULL);
            if (ost->img_resample_ctx == NULL) {
                fprintf(stderr, "Cannot get resampling context\n");
                ffmpeg_exit(1);
            }
        }
        sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,
              0, ost->resample_height, final_picture->data, final_picture->linesize);
    }
#endif

    /* duplicates frame if needed */
    for(i=0;i<nb_frames;i++) {
        AVPacket pkt;
        av_init_packet(&pkt);
        pkt.stream_index= ost->index;

        if (s->oformat->flags & AVFMT_RAWPICTURE) {
            /* raw pictures are written as AVPicture structure to
               avoid any copies. We support temorarily the older
               method. */
            AVFrame* old_frame = enc->coded_frame;
            enc->coded_frame = dec->coded_frame; //FIXME/XXX remove this hack
            pkt.data= (uint8_t *)final_picture;
            pkt.size=  sizeof(AVPicture);
            pkt.pts= av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
            pkt.flags |= AV_PKT_FLAG_KEY;

            write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
            enc->coded_frame = old_frame;
        } else {
            AVFrame big_picture;

            big_picture= *final_picture;
            /* better than nothing: use input picture interlaced
               settings */
            big_picture.interlaced_frame = in_picture->interlaced_frame;
            if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
                if(top_field_first == -1)
                    big_picture.top_field_first = in_picture->top_field_first;
                else
                    big_picture.top_field_first = top_field_first;
            }

            /* handles sameq here. This is not correct because it may
               not be a global option */
            big_picture.quality = same_quality ? ist->st->quality : ost->st->quality;
            if(!me_threshold)
                big_picture.pict_type = 0;
//            big_picture.pts = AV_NOPTS_VALUE;
            big_picture.pts= ost->sync_opts;
//            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);
//av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);
            if (ost->forced_kf_index < ost->forced_kf_count &&
                big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
                big_picture.pict_type = AV_PICTURE_TYPE_I;
                ost->forced_kf_index++;
            }
            ret = avcodec_encode_video(enc,
                                       bit_buffer, bit_buffer_size,
                                       &big_picture);
            if (ret < 0) {
                fprintf(stderr, "Video encoding failed\n");
                ffmpeg_exit(1);
            }

            if(ret>0){
                pkt.data= bit_buffer;
                pkt.size= ret;
                if(enc->coded_frame->pts != AV_NOPTS_VALUE)
                    pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
/*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",
   pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
   pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/

                if(enc->coded_frame->key_frame)
                    pkt.flags |= AV_PKT_FLAG_KEY;
                write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
                *frame_size = ret;
                video_size += ret;
                //fprintf(stderr,"\nFrame: %3d size: %5d type: %d",
                //        enc->frame_number-1, ret, enc->pict_type);
                /* if two pass, output log */
                if (ost->logfile && enc->stats_out) {
                    fprintf(ost->logfile, "%s", enc->stats_out);
                }
            }
        }
        ost->sync_opts++;
        ost->frame_number++;
    }
}

static double psnr(double d){
    return -10.0*log(d)/log(10.0);
}

static void do_video_stats(AVFormatContext *os, AVOutputStream *ost,
                           int frame_size)
{
    AVCodecContext *enc;
    int frame_number;
    double ti1, bitrate, avg_bitrate;

    /* this is executed just the first time do_video_stats is called */
    if (!vstats_file) {
        vstats_file = fopen(vstats_filename, "w");
        if (!vstats_file) {
            perror("fopen");
            ffmpeg_exit(1);
        }
    }

    enc = ost->st->codec;
    if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
        frame_number = ost->frame_number;
        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality/(float)FF_QP2LAMBDA);
        if (enc->flags&CODEC_FLAG_PSNR)
            fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0]/(enc->width*enc->height*255.0*255.0)));

        fprintf(vstats_file,"f_size= %6d ", frame_size);
        /* compute pts value */
        ti1 = ost->sync_opts * av_q2d(enc->time_base);
        if (ti1 < 0.01)
            ti1 = 0.01;

        bitrate = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
        avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
        fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
            (double)video_size / 1024, ti1, bitrate, avg_bitrate);
        fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
    }
}

static void print_report(AVFormatContext **output_files,
                         AVOutputStream **ost_table, int nb_ostreams,
                         int is_last_report)
{
    char buf[1024];
    AVOutputStream *ost;
    AVFormatContext *oc;
    int64_t total_size;
    AVCodecContext *enc;
    int frame_number, vid, i;
    double bitrate, ti1, pts;
    static int64_t last_time = -1;
    static int qp_histogram[52];

    if (!is_last_report) {
        int64_t cur_time;
        /* display the report every 0.5 seconds */
        cur_time = av_gettime();
        if (last_time == -1) {
            last_time = cur_time;
            return;
        }
        if ((cur_time - last_time) < 500000)
            return;
        last_time = cur_time;
    }


    oc = output_files[0];

    total_size = avio_size(oc->pb);
    if(total_size<0) // FIXME improve avio_size() so it works with non seekable output too
        total_size= avio_tell(oc->pb);

    buf[0] = '\0';
    ti1 = 1e10;
    vid = 0;
    for(i=0;i<nb_ostreams;i++) {
        float q = -1;
        ost = ost_table[i];
        enc = ost->st->codec;
        if (!ost->st->stream_copy && enc->coded_frame)
            q = enc->coded_frame->quality/(float)FF_QP2LAMBDA;
        if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
        }
        if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
            float t = (av_gettime()-timer_start) / 1000000.0;

            frame_number = ost->frame_number;
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
                     frame_number, (t>1)?(int)(frame_number/t+0.5) : 0, q);
            if(is_last_report)
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
            if(qp_hist){
                int j;
                int qp = lrintf(q);
                if(qp>=0 && qp<FF_ARRAY_ELEMS(qp_histogram))
                    qp_histogram[qp]++;
                for(j=0; j<32; j++)
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j]+1)/log(2)));
            }
            if (enc->flags&CODEC_FLAG_PSNR){
                int j;
                double error, error_sum=0;
                double scale, scale_sum=0;
                char type[3]= {'Y','U','V'};
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
                for(j=0; j<3; j++){
                    if(is_last_report){
                        error= enc->error[j];
                        scale= enc->width*enc->height*255.0*255.0*frame_number;
                    }else{
                        error= enc->coded_frame->error[j];
                        scale= enc->width*enc->height*255.0*255.0;
                    }
                    if(j) scale/=4;
                    error_sum += error;
                    scale_sum += scale;
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error/scale));
                }
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum/scale_sum));
            }
            vid = 1;
        }
        /* compute min output value */
        pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
        if ((pts < ti1) && (pts > 0))
            ti1 = pts;
    }
    if (ti1 < 0.01)
        ti1 = 0.01;

    if (verbose > 0 || is_last_report) {
        bitrate = (double)(total_size * 8) / ti1 / 1000.0;

        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
            "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
            (double)total_size / 1024, ti1, bitrate);

        if (nb_frames_dup || nb_frames_drop)
          snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
                  nb_frames_dup, nb_frames_drop);

        if (verbose >= 0)
            fprintf(stderr, "%s    \r", buf);

        fflush(stderr);
    }

    if (is_last_report && verbose >= 0){
        int64_t raw= audio_size + video_size + extra_size;
        fprintf(stderr, "\n");
        fprintf(stderr, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
                video_size/1024.0,
                audio_size/1024.0,
                extra_size/1024.0,
                100.0*(total_size - raw)/raw
        );
    }
}

static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
{
    int fill_char = 0x00;
    if (sample_fmt == AV_SAMPLE_FMT_U8)
        fill_char = 0x80;
    memset(buf, fill_char, size);
}

/* pkt = NULL means EOF (needed to flush decoder buffers) */
static int output_packet(AVInputStream *ist, int ist_index,
                         AVOutputStream **ost_table, int nb_ostreams,
                         const AVPacket *pkt)
{
    AVFormatContext *os;
    AVOutputStream *ost;
    int ret, i;
    int got_output;
    AVFrame picture;
    void *buffer_to_free = NULL;
    static unsigned int samples_size= 0;
    AVSubtitle subtitle, *subtitle_to_free;
    int64_t pkt_pts = AV_NOPTS_VALUE;
#if CONFIG_AVFILTER
    int frame_available;
#endif

    AVPacket avpkt;
    int bps = av_get_bits_per_sample_fmt(ist->st->codec->sample_fmt)>>3;

    if(ist->next_pts == AV_NOPTS_VALUE)
        ist->next_pts= ist->pts;

    if (pkt == NULL) {
        /* EOF handling */
        av_init_packet(&avpkt);
        avpkt.data = NULL;
        avpkt.size = 0;
        goto handle_eof;
    } else {
        avpkt = *pkt;
    }

    if(pkt->dts != AV_NOPTS_VALUE)
        ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
    if(pkt->pts != AV_NOPTS_VALUE)
        pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);

    //while we have more to decode or while the decoder did output something on EOF
    while (avpkt.size > 0 || (!pkt && got_output)) {
        uint8_t *data_buf, *decoded_data_buf;
        int data_size, decoded_data_size;
    handle_eof:
        ist->pts= ist->next_pts;

        if(avpkt.size && avpkt.size != pkt->size &&
           ((!ist->showed_multi_packet_warning && verbose>0) || verbose>1)){
            fprintf(stderr, "Multiple frames in a packet from stream %d\n", pkt->stream_index);
            ist->showed_multi_packet_warning=1;
        }

        /* decode the packet if needed */
        decoded_data_buf = NULL; /* fail safe */
        decoded_data_size= 0;
        data_buf  = avpkt.data;
        data_size = avpkt.size;
        subtitle_to_free = NULL;
        if (ist->decoding_needed) {
            switch(ist->st->codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:{
                if(pkt && samples_size < FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE)) {
                    samples_size = FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE);
                    av_free(samples);
                    samples= av_malloc(samples_size);
                }
                decoded_data_size= samples_size;
                    /* XXX: could avoid copy if PCM 16 bits with same
                       endianness as CPU */
                ret = avcodec_decode_audio3(ist->st->codec, samples, &decoded_data_size,
                                            &avpkt);
                if (ret < 0)
                    goto fail_decode;
                avpkt.data += ret;
                avpkt.size -= ret;
                data_size   = ret;
                got_output  = decoded_data_size > 0;
                /* Some bug in mpeg audio decoder gives */
                /* decoded_data_size < 0, it seems they are overflows */
                if (!got_output) {
                    /* no audio frame */
                    continue;
                }
                decoded_data_buf = (uint8_t *)samples;
                ist->next_pts += ((int64_t)AV_TIME_BASE/bps * decoded_data_size) /
                    (ist->st->codec->sample_rate * ist->st->codec->channels);
                break;}
            case AVMEDIA_TYPE_VIDEO:
                    decoded_data_size = (ist->st->codec->width * ist->st->codec->height * 3) / 2;
                    /* XXX: allocate picture correctly */
                    avcodec_get_frame_defaults(&picture);
                    avpkt.pts = pkt_pts;
                    avpkt.dts = ist->pts;
                    pkt_pts = AV_NOPTS_VALUE;

                    ret = avcodec_decode_video2(ist->st->codec,
                                                &picture, &got_output, &avpkt);
                    ist->st->quality= picture.quality;
                    if (ret < 0)
                        goto fail_decode;
                    if (!got_output) {
                        /* no picture yet */
                        goto discard_packet;
                    }
                    ist->next_pts = ist->pts = guess_correct_pts(&ist->pts_ctx, picture.pkt_pts, picture.pkt_dts);
                    if (ist->st->codec->time_base.num != 0) {
                        int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                        ist->next_pts += ((int64_t)AV_TIME_BASE *
                                          ist->st->codec->time_base.num * ticks) /
                            ist->st->codec->time_base.den;
                    }
                    avpkt.size = 0;
                    buffer_to_free = NULL;
                    pre_process_video_frame(ist, (AVPicture *)&picture, &buffer_to_free);
                    break;
            case AVMEDIA_TYPE_SUBTITLE:
                ret = avcodec_decode_subtitle2(ist->st->codec,
                                               &subtitle, &got_output, &avpkt);
                if (ret < 0)
                    goto fail_decode;
                if (!got_output) {
                    goto discard_packet;
                }
                subtitle_to_free = &subtitle;
                avpkt.size = 0;
                break;
            default:
                goto fail_decode;
            }
        } else {
            switch(ist->st->codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
                    ist->st->codec->sample_rate;
                break;
            case AVMEDIA_TYPE_VIDEO:
                if (ist->st->codec->time_base.num != 0) {
                    int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                    ist->next_pts += ((int64_t)AV_TIME_BASE *
                                      ist->st->codec->time_base.num * ticks) /
                        ist->st->codec->time_base.den;
                }
                break;
            }
            ret = avpkt.size;
            avpkt.size = 0;
        }

#if CONFIG_AVFILTER
        if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
            for (i = 0; i < nb_ostreams; i++) {
                ost = ost_table[i];
                if (ost->input_video_filter && ost->source_index == ist_index) {
                    AVRational sar;
                    if (ist->st->sample_aspect_ratio.num)
                        sar = ist->st->sample_aspect_ratio;
                    else
                        sar = ist->st->codec->sample_aspect_ratio;
                    // add it to be filtered
                    av_vsrc_buffer_add_frame(ost->input_video_filter, &picture,
                                             ist->pts,
                                             sar);
                }
            }
        }
#endif

        // preprocess audio (volume)
        if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
            if (audio_volume != 256) {
                short *volp;
                volp = samples;
                for(i=0;i<(decoded_data_size / sizeof(short));i++) {
                    int v = ((*volp) * audio_volume + 128) >> 8;
                    if (v < -32768) v = -32768;
                    if (v >  32767) v = 32767;
                    *volp++ = v;
                }
            }
        }

        /* frame rate emulation */
        if (rate_emu) {
            int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);
            int64_t now = av_gettime() - ist->start;
            if (pts > now)
                usleep(pts - now);
        }
        /* if output time reached then transcode raw format,
           encode packets and output them */
        if (start_time == 0 || ist->pts >= start_time)
            for(i=0;i<nb_ostreams;i++) {
                int frame_size;

                ost = ost_table[i];
                if (ost->source_index == ist_index) {
#if CONFIG_AVFILTER
                frame_available = ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
                    !ost->output_video_filter || avfilter_poll_frame(ost->output_video_filter->inputs[0]);
                while (frame_available) {
                    AVRational ist_pts_tb;
                    if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ost->output_video_filter)
                        get_filtered_video_frame(ost->output_video_filter, &picture, &ost->picref, &ist_pts_tb);
                    if (ost->picref)
                        ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
#endif
                    os = output_files[ost->file_index];

                    /* set the input output pts pairs */
                    //ost->sync_ipts = (double)(ist->pts + input_files_ts_offset[ist->file_index] - start_time)/ AV_TIME_BASE;

                    if (ost->encoding_needed) {
                        av_assert0(ist->decoding_needed);
                        switch(ost->st->codec->codec_type) {
                        case AVMEDIA_TYPE_AUDIO:
                            do_audio_out(os, ost, ist, decoded_data_buf, decoded_data_size);
                            break;
                        case AVMEDIA_TYPE_VIDEO:
#if CONFIG_AVFILTER
                            if (ost->picref->video && !ost->frame_aspect_ratio)
                                ost->st->codec->sample_aspect_ratio = ost->picref->video->pixel_aspect;
#endif
                            do_video_out(os, ost, ist, &picture, &frame_size);
                            if (vstats_filename && frame_size)
                                do_video_stats(os, ost, frame_size);
                            break;
                        case AVMEDIA_TYPE_SUBTITLE:
                            do_subtitle_out(os, ost, ist, &subtitle,
                                            pkt->pts);
                            break;
                        default:
                            abort();
                        }
                    } else {
                        AVFrame avframe; //FIXME/XXX remove this
                        AVPacket opkt;
                        int64_t ost_tb_start_time= av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);

                        av_init_packet(&opkt);

                        if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) && !copy_initial_nonkeyframes)
#if !CONFIG_AVFILTER
                            continue;
#else
                            goto cont;
#endif

                        /* no reencoding needed : output the packet directly */
                        /* force the input stream PTS */

                        avcodec_get_frame_defaults(&avframe);
                        ost->st->codec->coded_frame= &avframe;
                        avframe.key_frame = pkt->flags & AV_PKT_FLAG_KEY;

                        if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
                            audio_size += data_size;
                        else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
                            video_size += data_size;
                            ost->sync_opts++;
                        }

                        opkt.stream_index= ost->index;
                        if(pkt->pts != AV_NOPTS_VALUE)
                            opkt.pts= av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
                        else
                            opkt.pts= AV_NOPTS_VALUE;

                        if (pkt->dts == AV_NOPTS_VALUE)
                            opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);
                        else
                            opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
                        opkt.dts -= ost_tb_start_time;

                        opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
                        opkt.flags= pkt->flags;

                        //FIXME remove the following 2 lines they shall be replaced by the bitstream filters
                        if(   ost->st->codec->codec_id != CODEC_ID_H264
                           && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
                           && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
                           ) {
                            if(av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, data_buf, data_size, pkt->flags & AV_PKT_FLAG_KEY))
                                opkt.destruct= av_destruct_packet;
                        } else {
                            opkt.data = data_buf;
                            opkt.size = data_size;
                        }

                        write_frame(os, &opkt, ost->st->codec, ost->bitstream_filters);
                        ost->st->codec->frame_number++;
                        ost->frame_number++;
                        av_free_packet(&opkt);
                    }
#if CONFIG_AVFILTER
                    cont:
                    frame_available = (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) &&
                                       ost->output_video_filter && avfilter_poll_frame(ost->output_video_filter->inputs[0]);
                    if (ost->picref)
                        avfilter_unref_buffer(ost->picref);
                }
#endif
                }
            }

        av_free(buffer_to_free);
        /* XXX: allocate the subtitles in the codec ? */
        if (subtitle_to_free) {
            avsubtitle_free(subtitle_to_free);
            subtitle_to_free = NULL;
        }
    }
 discard_packet:
    if (pkt == NULL) {
        /* EOF handling */

        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            if (ost->source_index == ist_index) {
                AVCodecContext *enc= ost->st->codec;
                os = output_files[ost->file_index];

                if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <=1)
                    continue;
                if(ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE))
                    continue;

                if (ost->encoding_needed) {
                    for(;;) {
                        AVPacket pkt;
                        int fifo_bytes;
                        av_init_packet(&pkt);
                        pkt.stream_index= ost->index;

                        switch(ost->st->codec->codec_type) {
                        case AVMEDIA_TYPE_AUDIO:
                            fifo_bytes = av_fifo_size(ost->fifo);
                            ret = 0;
                            /* encode any samples remaining in fifo */
                            if (fifo_bytes > 0) {
                                int osize = av_get_bits_per_sample_fmt(enc->sample_fmt) >> 3;
                                int fs_tmp = enc->frame_size;

                                av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
                                if (enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
                                    enc->frame_size = fifo_bytes / (osize * enc->channels);
                                } else { /* pad */
                                    int frame_bytes = enc->frame_size*osize*enc->channels;
                                    if (allocated_audio_buf_size < frame_bytes)
                                        ffmpeg_exit(1);
                                    generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
                                }

                                ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, (short *)audio_buf);
                                pkt.duration = av_rescale((int64_t)enc->frame_size*ost->st->time_base.den,
                                                          ost->st->time_base.num, enc->sample_rate);
                                enc->frame_size = fs_tmp;
                            }
                            if(ret <= 0) {
                                ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
                            }
                            if (ret < 0) {
                                fprintf(stderr, "Audio encoding failed\n");
                                ffmpeg_exit(1);
                            }
                            audio_size += ret;
                            pkt.flags |= AV_PKT_FLAG_KEY;
                            break;
                        case AVMEDIA_TYPE_VIDEO:
                            ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
                            if (ret < 0) {
                                fprintf(stderr, "Video encoding failed\n");
                                ffmpeg_exit(1);
                            }
                            video_size += ret;
                            if(enc->coded_frame && enc->coded_frame->key_frame)
                                pkt.flags |= AV_PKT_FLAG_KEY;
                            if (ost->logfile && enc->stats_out) {
                                fprintf(ost->logfile, "%s", enc->stats_out);
                            }
                            break;
                        default:
                            ret=-1;
                        }

                        if(ret<=0)
                            break;
                        pkt.data= bit_buffer;
                        pkt.size= ret;
                        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
                        write_frame(os, &pkt, ost->st->codec, ost->bitstream_filters);
                    }
                }
            }
        }
    }

    return 0;
 fail_decode:
    return -1;
}

static void print_sdp(AVFormatContext **avc, int n)
{
    char sdp[2048];

    av_sdp_create(avc, n, sdp, sizeof(sdp));
    printf("SDP:\n%s\n", sdp);
    fflush(stdout);
}

static int copy_chapters(int infile, int outfile)
{
    AVFormatContext *is = input_files[infile].ctx;
    AVFormatContext *os = output_files[outfile];
    int i;

    for (i = 0; i < is->nb_chapters; i++) {
        AVChapter *in_ch = is->chapters[i], *out_ch;
        int64_t ts_off   = av_rescale_q(start_time - input_files_ts_offset[infile],
                                      AV_TIME_BASE_Q, in_ch->time_base);
        int64_t rt       = (recording_time == INT64_MAX) ? INT64_MAX :
                           av_rescale_q(recording_time, AV_TIME_BASE_Q, in_ch->time_base);


        if (in_ch->end < ts_off)
            continue;
        if (rt != INT64_MAX && in_ch->start > rt + ts_off)
            break;

        out_ch = av_mallocz(sizeof(AVChapter));
        if (!out_ch)
            return AVERROR(ENOMEM);

        out_ch->id        = in_ch->id;
        out_ch->time_base = in_ch->time_base;
        out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
        out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);

        if (metadata_chapters_autocopy)
            av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);

        os->nb_chapters++;
        os->chapters = av_realloc(os->chapters, sizeof(AVChapter)*os->nb_chapters);
        if (!os->chapters)
            return AVERROR(ENOMEM);
        os->chapters[os->nb_chapters - 1] = out_ch;
    }
    return 0;
}

static void parse_forced_key_frames(char *kf, AVOutputStream *ost,
                                    AVCodecContext *avctx)
{
    char *p;
    int n = 1, i;
    int64_t t;

    for (p = kf; *p; p++)
        if (*p == ',')
            n++;
    ost->forced_kf_count = n;
    ost->forced_kf_pts = av_malloc(sizeof(*ost->forced_kf_pts) * n);
    if (!ost->forced_kf_pts) {
        av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
        ffmpeg_exit(1);
    }
    for (i = 0; i < n; i++) {
        p = i ? strchr(p, ',') + 1 : kf;
        t = parse_time_or_die("force_key_frames", p, 1);
        ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
    }
}

/*
 * The following code is the main loop of the file converter
 */
static int transcode(AVFormatContext **output_files,
                     int nb_output_files,
                     AVInputFile *input_files,
                     int nb_input_files,
                     AVStreamMap *stream_maps, int nb_stream_maps)
{
    int ret = 0, i, j, k, n, nb_ostreams = 0;
    AVFormatContext *is, *os;
    AVCodecContext *codec, *icodec;
    AVOutputStream *ost, **ost_table = NULL;
    AVInputStream *ist;
    char error[1024];
    int want_sdp = 1;
    uint8_t no_packet[MAX_FILES]={0};
    int no_packet_count=0;

    if (rate_emu)
        for (i = 0; i < nb_input_streams; i++)
            input_streams[i].start = av_gettime();

    /* output stream init */
    nb_ostreams = 0;
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        if (!os->nb_streams && !(os->oformat->flags & AVFMT_NOSTREAMS)) {
            av_dump_format(output_files[i], i, output_files[i]->filename, 1);
            fprintf(stderr, "Output file #%d does not contain any stream\n", i);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        nb_ostreams += os->nb_streams;
    }
    if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
        fprintf(stderr, "Number of stream maps must match number of output streams\n");
        ret = AVERROR(EINVAL);
        goto fail;
    }

    /* Sanity check the mapping args -- do the input files & streams exist? */
    for(i=0;i<nb_stream_maps;i++) {
        int fi = stream_maps[i].file_index;
        int si = stream_maps[i].stream_index;

        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > input_files[fi].ctx->nb_streams - 1) {
            fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        fi = stream_maps[i].sync_file_index;
        si = stream_maps[i].sync_stream_index;
        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > input_files[fi].ctx->nb_streams - 1) {
            fprintf(stderr,"Could not find sync stream #%d.%d\n", fi, si);
            ret = AVERROR(EINVAL);
            goto fail;
        }
    }

    ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
    if (!ost_table)
        goto fail;
    n = 0;
    for(k=0;k<nb_output_files;k++) {
        os = output_files[k];
        for(i=0;i<os->nb_streams;i++,n++) {
            int found;
            ost = ost_table[n] = output_streams_for_file[k][i];
            ost->st = os->streams[i];
            if (nb_stream_maps > 0) {
                ost->source_index = input_files[stream_maps[n].file_index].ist_index +
                    stream_maps[n].stream_index;

                /* Sanity check that the stream types match */
                if (input_streams[ost->source_index].st->codec->codec_type != ost->st->codec->codec_type) {
                    int i= ost->file_index;
                    av_dump_format(output_files[i], i, output_files[i]->filename, 1);
                    fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n",
                        stream_maps[n].file_index, stream_maps[n].stream_index,
                        ost->file_index, ost->index);
                    ffmpeg_exit(1);
                }

            } else {
                int best_nb_frames=-1;
                /* get corresponding input stream index : we select the first one with the right type */
                found = 0;
                for (j = 0; j < nb_input_streams; j++) {
                    int skip=0;
                    ist = &input_streams[j];
                    if(opt_programid){
                        int pi,si;
                        AVFormatContext *f = input_files[ist->file_index].ctx;
                        skip=1;
                        for(pi=0; pi<f->nb_programs; pi++){
                            AVProgram *p= f->programs[pi];
                            if(p->id == opt_programid)
                                for(si=0; si<p->nb_stream_indexes; si++){
                                    if(f->streams[ p->stream_index[si] ] == ist->st)
                                        skip=0;
                                }
                        }
                    }
                    if (ist->discard && ist->st->discard != AVDISCARD_ALL && !skip &&
                        ist->st->codec->codec_type == ost->st->codec->codec_type) {
                        if(best_nb_frames < ist->st->codec_info_nb_frames){
                            best_nb_frames= ist->st->codec_info_nb_frames;
                            ost->source_index = j;
                            found = 1;
                        }
                    }
                }

                if (!found) {
                    if(! opt_programid) {
                        /* try again and reuse existing stream */
                        for (j = 0; j < nb_input_streams; j++) {
                            ist = &input_streams[j];
                            if (   ist->st->codec->codec_type == ost->st->codec->codec_type
                                && ist->st->discard != AVDISCARD_ALL) {
                                ost->source_index = j;
                                found = 1;
                            }
                        }
                    }
                    if (!found) {
                        int i= ost->file_index;
                        av_dump_format(output_files[i], i, output_files[i]->filename, 1);
                        fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
                                ost->file_index, ost->index);
                        ffmpeg_exit(1);
                    }
                }
            }
            ist = &input_streams[ost->source_index];
            ist->discard = 0;
            ost->sync_ist = (nb_stream_maps > 0) ?
                &input_streams[input_files[stream_maps[n].sync_file_index].ist_index +
                         stream_maps[n].sync_stream_index] : ist;
        }
    }

    /* for each output stream, we compute the right encoding parameters */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        os = output_files[ost->file_index];
        ist = &input_streams[ost->source_index];

        codec = ost->st->codec;
        icodec = ist->st->codec;

        if (metadata_streams_autocopy)
            av_dict_copy(&ost->st->metadata, ist->st->metadata,
                         AV_DICT_DONT_OVERWRITE);

        ost->st->disposition = ist->st->disposition;
        codec->bits_per_raw_sample= icodec->bits_per_raw_sample;
        codec->chroma_sample_location = icodec->chroma_sample_location;

        if (ost->st->stream_copy) {
            uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;

            if (extra_size > INT_MAX)
                goto fail;

            /* if stream_copy is selected, no need to decode or encode */
            codec->codec_id = icodec->codec_id;
            codec->codec_type = icodec->codec_type;

            if(!codec->codec_tag){
                if(   !os->oformat->codec_tag
                   || av_codec_get_id (os->oformat->codec_tag, icodec->codec_tag) == codec->codec_id
                   || av_codec_get_tag(os->oformat->codec_tag, icodec->codec_id) <= 0)
                    codec->codec_tag = icodec->codec_tag;
            }

            codec->bit_rate = icodec->bit_rate;
            codec->rc_max_rate    = icodec->rc_max_rate;
            codec->rc_buffer_size = icodec->rc_buffer_size;
            codec->extradata= av_mallocz(extra_size);
            if (!codec->extradata)
                goto fail;
            memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
            codec->extradata_size= icodec->extradata_size;
            if(!copy_tb && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/500){
                codec->time_base = icodec->time_base;
                codec->time_base.num *= icodec->ticks_per_frame;
                av_reduce(&codec->time_base.num, &codec->time_base.den,
                          codec->time_base.num, codec->time_base.den, INT_MAX);
            }else
                codec->time_base = ist->st->time_base;
            switch(codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                if(audio_volume != 256) {
                    fprintf(stderr,"-acodec copy and -vol are incompatible (frames are not decoded)\n");
                    ffmpeg_exit(1);
                }
                codec->channel_layout = icodec->channel_layout;
                codec->sample_rate = icodec->sample_rate;
                codec->channels = icodec->channels;
                codec->frame_size = icodec->frame_size;
                codec->audio_service_type = icodec->audio_service_type;
                codec->block_align= icodec->block_align;
                if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
                    codec->block_align= 0;
                if(codec->codec_id == CODEC_ID_AC3)
                    codec->block_align= 0;
                break;
            case AVMEDIA_TYPE_VIDEO:
                codec->pix_fmt = icodec->pix_fmt;
                codec->width = icodec->width;
                codec->height = icodec->height;
                codec->has_b_frames = icodec->has_b_frames;
                if (!codec->sample_aspect_ratio.num) {
                    codec->sample_aspect_ratio =
                    ost->st->sample_aspect_ratio =
                        ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
                        ist->st->codec->sample_aspect_ratio.num ?
                        ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
                }
                break;
            case AVMEDIA_TYPE_SUBTITLE:
                codec->width = icodec->width;
                codec->height = icodec->height;
                break;
            case AVMEDIA_TYPE_DATA:
                break;
            default:
                abort();
            }
        } else {
            switch(codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                ost->fifo= av_fifo_alloc(1024);
                if(!ost->fifo)
                    goto fail;
                ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);
                if (!codec->sample_rate) {
                    codec->sample_rate = icodec->sample_rate;
                    if (icodec->lowres)
                        codec->sample_rate >>= icodec->lowres;
                }
                choose_sample_rate(ost->st, codec->codec);
                codec->time_base = (AVRational){1, codec->sample_rate};
                if (!codec->channels)
                    codec->channels = icodec->channels;
                if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
                    codec->channel_layout = 0;
                ost->audio_resample = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
                icodec->request_channels = codec->channels;
                ist->decoding_needed = 1;
                ost->encoding_needed = 1;
                ost->resample_sample_fmt  = icodec->sample_fmt;
                ost->resample_sample_rate = icodec->sample_rate;
                ost->resample_channels    = icodec->channels;
                break;
            case AVMEDIA_TYPE_VIDEO:
                if (ost->st->codec->pix_fmt == PIX_FMT_NONE) {
                    fprintf(stderr, "Video pixel format is unknown, stream cannot be encoded\n");
                    ffmpeg_exit(1);
                }
                ost->video_resample = codec->width   != icodec->width  ||
                                      codec->height  != icodec->height ||
                                      codec->pix_fmt != icodec->pix_fmt;