ffmpeg.c

    return ret;
 fail:
    ret = AVERROR(ENOMEM);
    goto fail1;
}

#if 0
int file_read(const char *filename)
{
    URLContext *h;
    unsigned char buffer[1024];
    int len, i;

    if (url_open(&h, filename, O_RDONLY) < 0) {
        printf("could not open '%s'\n", filename);
        return -1;
    }
    for(;;) {
        len = url_read(h, buffer, sizeof(buffer));
        if (len <= 0)
            break;
        for(i=0;i<len;i++) putchar(buffer[i]);
    }
    url_close(h);
    return 0;
}
#endif

static void opt_format(const char *arg)
{
    /* compatibility stuff for pgmyuv */
    if (!strcmp(arg, "pgmyuv")) {
        pgmyuv_compatibility_hack=1;
//        opt_image_format(arg);
        arg = "image2";
        fprintf(stderr, "pgmyuv format is deprecated, use image2\n");
    }

    file_iformat = av_find_input_format(arg);
    file_oformat = guess_format(arg, NULL, NULL);
    if (!file_iformat && !file_oformat) {
        fprintf(stderr, "Unknown input or output format: %s\n", arg);
        exit(1);
    }
}

static void opt_video_rc_eq(char *arg)
{
    video_rc_eq = arg;
}

static void opt_video_rc_override_string(char *arg)
{
    video_rc_override_string = arg;
}

static void opt_me_threshold(const char *arg)
{
    me_threshold = atoi(arg);
}

static void opt_verbose(const char *arg)
{
    verbose = atoi(arg);
    av_log_level = atoi(arg);
}

static void opt_frame_rate(const char *arg)
{
    if (av_parse_video_frame_rate(&frame_rate, arg) < 0) {
        fprintf(stderr, "Incorrect frame rate\n");
        exit(1);
    }
}

static void opt_frame_crop_top(const char *arg)
{
    frame_topBand = atoi(arg);
    if (frame_topBand < 0) {
        fprintf(stderr, "Incorrect top crop size\n");
        exit(1);
    }
    if ((frame_topBand % 2) != 0) {
        fprintf(stderr, "Top crop size must be a multiple of 2\n");
        exit(1);
    }
    if ((frame_topBand) >= frame_height){
        fprintf(stderr, "Vertical crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        exit(1);
    }
    frame_height -= frame_topBand;
}

static void opt_frame_crop_bottom(const char *arg)
{
    frame_bottomBand = atoi(arg);
    if (frame_bottomBand < 0) {
        fprintf(stderr, "Incorrect bottom crop size\n");
        exit(1);
    }
    if ((frame_bottomBand % 2) != 0) {
        fprintf(stderr, "Bottom crop size must be a multiple of 2\n");
        exit(1);
    }
    if ((frame_bottomBand) >= frame_height){
        fprintf(stderr, "Vertical crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        exit(1);
    }
    frame_height -= frame_bottomBand;
}

static void opt_frame_crop_left(const char *arg)
{
    frame_leftBand = atoi(arg);
    if (frame_leftBand < 0) {
        fprintf(stderr, "Incorrect left crop size\n");
        exit(1);
    }
    if ((frame_leftBand % 2) != 0) {
        fprintf(stderr, "Left crop size must be a multiple of 2\n");
        exit(1);
    }
    if ((frame_leftBand) >= frame_width){
        fprintf(stderr, "Horizontal crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        exit(1);
    }
    frame_width -= frame_leftBand;
}

static void opt_frame_crop_right(const char *arg)
{
    frame_rightBand = atoi(arg);
    if (frame_rightBand < 0) {
        fprintf(stderr, "Incorrect right crop size\n");
        exit(1);
    }
    if ((frame_rightBand % 2) != 0) {
        fprintf(stderr, "Right crop size must be a multiple of 2\n");
        exit(1);
    }
    if ((frame_rightBand) >= frame_width){
        fprintf(stderr, "Horizontal crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        exit(1);
    }
    frame_width -= frame_rightBand;
}

static void opt_frame_size(const char *arg)
{
    if (av_parse_video_frame_size(&frame_width, &frame_height, arg) < 0) {
        fprintf(stderr, "Incorrect frame size\n");
        exit(1);
    }
    if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
        fprintf(stderr, "Frame size must be a multiple of 2\n");
        exit(1);
    }
}


#define SCALEBITS 10
#define ONE_HALF  (1 << (SCALEBITS - 1))
#define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))

#define RGB_TO_Y(r, g, b) \
((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \
  FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)

#define RGB_TO_U(r1, g1, b1, shift)\
(((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +         \
     FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

#define RGB_TO_V(r1, g1, b1, shift)\
(((FIX(0.50000) * r1 - FIX(0.41869) * g1 -           \
   FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

static void opt_pad_color(const char *arg) {
    /* Input is expected to be six hex digits similar to
       how colors are expressed in html tags (but without the #) */
    int rgb = strtol(arg, NULL, 16);
    int r,g,b;

    r = (rgb >> 16);
    g = ((rgb >> 8) & 255);
    b = (rgb & 255);

    padcolor[0] = RGB_TO_Y(r,g,b);
    padcolor[1] = RGB_TO_U(r,g,b,0);
    padcolor[2] = RGB_TO_V(r,g,b,0);
}

static void opt_frame_pad_top(const char *arg)
{
    frame_padtop = atoi(arg);
    if (frame_padtop < 0) {
        fprintf(stderr, "Incorrect top pad size\n");
        exit(1);
    }
    if ((frame_padtop % 2) != 0) {
        fprintf(stderr, "Top pad size must be a multiple of 2\n");
        exit(1);
    }
}

static void opt_frame_pad_bottom(const char *arg)
{
    frame_padbottom = atoi(arg);
    if (frame_padbottom < 0) {
        fprintf(stderr, "Incorrect bottom pad size\n");
        exit(1);
    }
    if ((frame_padbottom % 2) != 0) {
        fprintf(stderr, "Bottom pad size must be a multiple of 2\n");
        exit(1);
    }
}


static void opt_frame_pad_left(const char *arg)
{
    frame_padleft = atoi(arg);
    if (frame_padleft < 0) {
        fprintf(stderr, "Incorrect left pad size\n");
        exit(1);
    }
    if ((frame_padleft % 2) != 0) {
        fprintf(stderr, "Left pad size must be a multiple of 2\n");
        exit(1);
    }
}


static void opt_frame_pad_right(const char *arg)
{
    frame_padright = atoi(arg);
    if (frame_padright < 0) {
        fprintf(stderr, "Incorrect right pad size\n");
        exit(1);
    }
    if ((frame_padright % 2) != 0) {
        fprintf(stderr, "Right pad size must be a multiple of 2\n");
        exit(1);
    }
}

void list_pix_fmts(void)
{
    int i;
    char pix_fmt_str[128];
    for (i=-1; i < PIX_FMT_NB; i++) {
        avcodec_pix_fmt_string (pix_fmt_str, sizeof(pix_fmt_str), i);
        fprintf(stdout, "%s\n", pix_fmt_str);
    }
}

static void opt_frame_pix_fmt(const char *arg)
{
    if (strcmp(arg, "list"))
        frame_pix_fmt = avcodec_get_pix_fmt(arg);
    else {
        list_pix_fmts();
        exit(0);
    }
}

static void opt_frame_aspect_ratio(const char *arg)
{
    int x = 0, y = 0;
    double ar = 0;
    const char *p;

    p = strchr(arg, ':');
    if (p) {
        x = strtol(arg, (char **)&arg, 10);
        if (arg == p)
            y = strtol(arg+1, (char **)&arg, 10);
        if (x > 0 && y > 0)
            ar = (double)x / (double)y;
    } else
        ar = strtod(arg, (char **)&arg);

    if (!ar) {
        fprintf(stderr, "Incorrect aspect ratio specification.\n");
        exit(1);
    }
    frame_aspect_ratio = ar;
}

static void opt_qscale(const char *arg)
{
    video_qscale = atof(arg);
    if (video_qscale <= 0 ||
        video_qscale > 255) {
        fprintf(stderr, "qscale must be > 0.0 and <= 255\n");
        exit(1);
    }
}

static void opt_qdiff(const char *arg)
{
    video_qdiff = atoi(arg);
    if (video_qdiff < 0 ||
        video_qdiff > 31) {
        fprintf(stderr, "qdiff must be >= 1 and <= 31\n");
        exit(1);
    }
}

static void opt_strict(const char *arg)
{
    strict= atoi(arg);
}

static void opt_top_field_first(const char *arg)
{
    top_field_first= atoi(arg);
}

static void opt_thread_count(const char *arg)
{
    thread_count= atoi(arg);
#if !defined(HAVE_THREADS)
    if (verbose >= 0)
        fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
#endif
}

static void opt_audio_rate(const char *arg)
{
    audio_sample_rate = atoi(arg);
}

static void opt_audio_channels(const char *arg)
{
    audio_channels = atoi(arg);
}

static void opt_video_channel(const char *arg)
{
    video_channel = strtol(arg, NULL, 0);
}

static void opt_video_standard(const char *arg)
{
    video_standard = av_strdup(arg);
}

static void opt_codec(int *pstream_copy, int *pcodec_id,
                      int codec_type, const char *arg)
{
    AVCodec *p;

    if (!strcmp(arg, "copy")) {
        *pstream_copy = 1;
    } else {
        p = first_avcodec;
        while (p) {
            if (!strcmp(p->name, arg) && p->type == codec_type)
                break;
            p = p->next;
        }
        if (p == NULL) {
            fprintf(stderr, "Unknown codec '%s'\n", arg);
            exit(1);
        } else {
            *pcodec_id = p->id;
        }
    }
}

static void opt_audio_codec(const char *arg)
{
    opt_codec(&audio_stream_copy, &audio_codec_id, CODEC_TYPE_AUDIO, arg);
}

static void opt_audio_tag(const char *arg)
{
    char *tail;
    audio_codec_tag= strtol(arg, &tail, 0);

    if(!tail || *tail)
        audio_codec_tag= arg[0] + (arg[1]<<8) + (arg[2]<<16) + (arg[3]<<24);
}

static void opt_video_tag(const char *arg)
{
    char *tail;
    video_codec_tag= strtol(arg, &tail, 0);

    if(!tail || *tail)
        video_codec_tag= arg[0] + (arg[1]<<8) + (arg[2]<<16) + (arg[3]<<24);
}

static void add_frame_hooker(const char *arg)
{
    int argc = 0;
    char *argv[64];
    int i;
    char *args = av_strdup(arg);

    using_vhook = 1;

    argv[0] = strtok(args, " ");
    while (argc < 62 && (argv[++argc] = strtok(NULL, " "))) {
    }

    i = frame_hook_add(argc, argv);

    if (i != 0) {
        fprintf(stderr, "Failed to add video hook function: %s\n", arg);
        exit(1);
    }
}

const char *motion_str[] = {
    "zero",
    "full",
    "log",
    "phods",
    "epzs",
    "x1",
    "hex",
    "umh",
    "iter",
    NULL,
};

static void opt_motion_estimation(const char *arg)
{
    const char **p;
    p = motion_str;
    for(;;) {
        if (!*p) {
            fprintf(stderr, "Unknown motion estimation method '%s'\n", arg);
            exit(1);
        }
        if (!strcmp(*p, arg))
            break;
        p++;
    }
    me_method = (p - motion_str) + 1;
}

static void opt_video_codec(const char *arg)
{
    opt_codec(&video_stream_copy, &video_codec_id, CODEC_TYPE_VIDEO, arg);
}

static void opt_subtitle_codec(const char *arg)
{
    opt_codec(&subtitle_stream_copy, &subtitle_codec_id, CODEC_TYPE_SUBTITLE, arg);
}

static void opt_map(const char *arg)
{
    AVStreamMap *m;
    const char *p;

    p = arg;
    m = &stream_maps[nb_stream_maps++];

    m->file_index = strtol(arg, (char **)&p, 0);
    if (*p)
        p++;

    m->stream_index = strtol(p, (char **)&p, 0);
    if (*p) {
        p++;
        m->sync_file_index = strtol(p, (char **)&p, 0);
        if (*p)
            p++;
        m->sync_stream_index = strtol(p, (char **)&p, 0);
    } else {
        m->sync_file_index = m->file_index;
        m->sync_stream_index = m->stream_index;
    }
}

static void opt_map_meta_data(const char *arg)
{
    AVMetaDataMap *m;
    const char *p;

    p = arg;
    m = &meta_data_maps[nb_meta_data_maps++];

    m->out_file = strtol(arg, (char **)&p, 0);
    if (*p)
        p++;

    m->in_file = strtol(p, (char **)&p, 0);
}

static void opt_recording_time(const char *arg)
{
    recording_time = parse_date(arg, 1);
}

static void opt_start_time(const char *arg)
{
    start_time = parse_date(arg, 1);
}

static void opt_rec_timestamp(const char *arg)
{
    rec_timestamp = parse_date(arg, 0) / 1000000;
}

static void opt_input_ts_offset(const char *arg)
{
    input_ts_offset = parse_date(arg, 1);
}

static void opt_input_file(const char *filename)
{
    AVFormatContext *ic;
    AVFormatParameters params, *ap = &params;
    int err, i, ret, rfps, rfps_base;
    int64_t timestamp;

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    using_stdin |= !strncmp(filename, "pipe:", 5) ||
                   !strcmp( filename, "/dev/stdin" );

    /* get default parameters from command line */
    ic = av_alloc_format_context();

    memset(ap, 0, sizeof(*ap));
    ap->prealloced_context = 1;
    ap->sample_rate = audio_sample_rate;
    ap->channels = audio_channels;
    ap->time_base.den = frame_rate.num;
    ap->time_base.num = frame_rate.den;
    ap->width = frame_width + frame_padleft + frame_padright;
    ap->height = frame_height + frame_padtop + frame_padbottom;
    ap->pix_fmt = frame_pix_fmt;
    ap->channel = video_channel;
    ap->standard = video_standard;
    ap->video_codec_id = video_codec_id;
    ap->audio_codec_id = audio_codec_id;
    if(pgmyuv_compatibility_hack)
        ap->video_codec_id= CODEC_ID_PGMYUV;

    for(i=0; i<opt_name_count; i++){
        const AVOption *opt;
        double d= av_get_double(avformat_opts, opt_names[i], &opt);
        if(d==d && (opt->flags&AV_OPT_FLAG_DECODING_PARAM))
            av_set_double(ic, opt_names[i], d);
    }
    /* open the input file with generic libav function */
    err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
    if (err < 0) {
        print_error(filename, err);
        exit(1);
    }

    ic->loop_input = loop_input;

    /* If not enough info to get the stream parameters, we decode the
       first frames to get it. (used in mpeg case for example) */
    ret = av_find_stream_info(ic);
    if (ret < 0 && verbose >= 0) {
        fprintf(stderr, "%s: could not find codec parameters\n", filename);
        exit(1);
    }

    timestamp = start_time;
    /* add the stream start time */
    if (ic->start_time != AV_NOPTS_VALUE)
        timestamp += ic->start_time;

    /* if seeking requested, we execute it */
    if (start_time != 0) {
        ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
        if (ret < 0) {
            fprintf(stderr, "%s: could not seek to position %0.3f\n",
                    filename, (double)timestamp / AV_TIME_BASE);
        }
        /* reset seek info */
        start_time = 0;
    }

    /* update the current parameters so that they match the one of the input stream */
    for(i=0;i<ic->nb_streams;i++) {
        int j;
        AVCodecContext *enc = ic->streams[i]->codec;
        if(thread_count>1)
            avcodec_thread_init(enc, thread_count);
        enc->thread_count= thread_count;
        switch(enc->codec_type) {
        case CODEC_TYPE_AUDIO:
            for(j=0; j<opt_name_count; j++){
                const AVOption *opt;
                double d= av_get_double(avctx_opts[CODEC_TYPE_AUDIO], opt_names[j], &opt);
                if(d==d && (opt->flags&AV_OPT_FLAG_AUDIO_PARAM) && (opt->flags&AV_OPT_FLAG_DECODING_PARAM))
                    av_set_double(enc, opt_names[j], d);
            }
            //fprintf(stderr, "\nInput Audio channels: %d", enc->channels);
            audio_channels = enc->channels;
            audio_sample_rate = enc->sample_rate;
            if(audio_disable)
                ic->streams[i]->discard= AVDISCARD_ALL;
            break;
        case CODEC_TYPE_VIDEO:
            for(j=0; j<opt_name_count; j++){
                const AVOption *opt;
                double d= av_get_double(avctx_opts[CODEC_TYPE_VIDEO], opt_names[j], &opt);
                if(d==d && (opt->flags&AV_OPT_FLAG_VIDEO_PARAM) && (opt->flags&AV_OPT_FLAG_DECODING_PARAM))
                    av_set_double(enc, opt_names[j], d);
            }
            frame_height = enc->height;
            frame_width = enc->width;
            frame_aspect_ratio = av_q2d(enc->sample_aspect_ratio) * enc->width / enc->height;
            frame_pix_fmt = enc->pix_fmt;
            rfps      = ic->streams[i]->r_frame_rate.num;
            rfps_base = ic->streams[i]->r_frame_rate.den;
            if(enc->lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
            if(me_threshold)
                enc->debug |= FF_DEBUG_MV;

            if (enc->time_base.den != rfps || enc->time_base.num != rfps_base) {

                if (verbose >= 0)
                    fprintf(stderr,"\nSeems stream %d codec frame rate differs from container frame rate: %2.2f (%d/%d) -> %2.2f (%d/%d)\n",
                            i, (float)enc->time_base.den / enc->time_base.num, enc->time_base.den, enc->time_base.num,

                    (float)rfps / rfps_base, rfps, rfps_base);
            }
            /* update the current frame rate to match the stream frame rate */
            frame_rate.num = rfps;
            frame_rate.den = rfps_base;

            enc->rate_emu = rate_emu;
            if(video_disable)
                ic->streams[i]->discard= AVDISCARD_ALL;
            else if(video_discard)
                ic->streams[i]->discard= video_discard;
            break;
        case CODEC_TYPE_DATA:
            break;
        case CODEC_TYPE_SUBTITLE:
            break;
        case CODEC_TYPE_UNKNOWN:
            break;
        default:
            av_abort();
        }
    }

    input_files[nb_input_files] = ic;
    input_files_ts_offset[nb_input_files] = input_ts_offset - (copy_ts ? 0 : timestamp);
    /* dump the file content */
    if (verbose >= 0)
        dump_format(ic, nb_input_files, filename, 0);

    nb_input_files++;
    file_iformat = NULL;
    file_oformat = NULL;

    video_channel = 0;

    rate_emu = 0;
}

static void check_audio_video_inputs(int *has_video_ptr, int *has_audio_ptr)
{
    int has_video, has_audio, i, j;
    AVFormatContext *ic;

    has_video = 0;
    has_audio = 0;
    for(j=0;j<nb_input_files;j++) {
        ic = input_files[j];
        for(i=0;i<ic->nb_streams;i++) {
            AVCodecContext *enc = ic->streams[i]->codec;
            switch(enc->codec_type) {
            case CODEC_TYPE_AUDIO:
                has_audio = 1;
                break;
            case CODEC_TYPE_VIDEO:
                has_video = 1;
                break;
            case CODEC_TYPE_DATA:
            case CODEC_TYPE_UNKNOWN:
            case CODEC_TYPE_SUBTITLE:
                break;
            default:
                av_abort();
            }
        }
    }
    *has_video_ptr = has_video;
    *has_audio_ptr = has_audio;
}

static void new_video_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *video_enc;
    int codec_id;

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);
    bitstream_filters[nb_output_files][oc->nb_streams - 1]= video_bitstream_filters;
    video_bitstream_filters= NULL;

    if(thread_count>1)
        avcodec_thread_init(st->codec, thread_count);

    video_enc = st->codec;

    if(video_codec_tag)
        video_enc->codec_tag= video_codec_tag;

    if(   (video_global_header&1)
       || (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))){
        video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avctx_opts[CODEC_TYPE_VIDEO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if(video_global_header&2){
        video_enc->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
        avctx_opts[CODEC_TYPE_VIDEO]->flags2|= CODEC_FLAG2_LOCAL_HEADER;
    }

    if (video_stream_copy) {
        st->stream_copy = 1;
        video_enc->codec_type = CODEC_TYPE_VIDEO;
    } else {
        char *p;
        int i;
        AVCodec *codec;

        codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_VIDEO);
        if (video_codec_id != CODEC_ID_NONE)
            codec_id = video_codec_id;

        video_enc->codec_id = codec_id;
        codec = avcodec_find_encoder(codec_id);

        for(i=0; i<opt_name_count; i++){
             const AVOption *opt;
             double d= av_get_double(avctx_opts[CODEC_TYPE_VIDEO], opt_names[i], &opt);
             if(d==d && (opt->flags&AV_OPT_FLAG_VIDEO_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                 av_set_double(video_enc, opt_names[i], d);
        }

        video_enc->time_base.den = frame_rate.num;
        video_enc->time_base.num = frame_rate.den;
        if(codec && codec->supported_framerates){
            const AVRational *p= codec->supported_framerates;
            AVRational req= (AVRational){frame_rate.num, frame_rate.den};
            const AVRational *best=NULL;
            AVRational best_error= (AVRational){INT_MAX, 1};
            for(; p->den!=0; p++){
                AVRational error= av_sub_q(req, *p);
                if(error.num <0) error.num *= -1;
                if(av_cmp_q(error, best_error) < 0){
                    best_error= error;
                    best= p;
                }
            }
            video_enc->time_base.den= best->num;
            video_enc->time_base.num= best->den;
        }

        video_enc->width = frame_width + frame_padright + frame_padleft;
        video_enc->height = frame_height + frame_padtop + frame_padbottom;
        video_enc->sample_aspect_ratio = av_d2q(frame_aspect_ratio*video_enc->height/video_enc->width, 255);
        video_enc->pix_fmt = frame_pix_fmt;

        if(codec && codec->pix_fmts){
            const enum PixelFormat *p= codec->pix_fmts;
            for(; *p!=-1; p++){
                if(*p == video_enc->pix_fmt)
                    break;
            }
            if(*p == -1)
                video_enc->pix_fmt = codec->pix_fmts[0];
        }

        if (intra_only)
            video_enc->gop_size = 0;
        if (video_qscale || same_quality) {
            video_enc->flags |= CODEC_FLAG_QSCALE;
            video_enc->global_quality=
                st->quality = FF_QP2LAMBDA * video_qscale;
        }

        if(intra_matrix)
            video_enc->intra_matrix = intra_matrix;
        if(inter_matrix)
            video_enc->inter_matrix = inter_matrix;

        video_enc->max_qdiff = video_qdiff;
        video_enc->rc_eq = video_rc_eq;
        video_enc->thread_count = thread_count;
        p= video_rc_override_string;
        for(i=0; p; i++){
            int start, end, q;
            int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
            if(e!=3){
                fprintf(stderr, "error parsing rc_override\n");
                exit(1);
            }
            video_enc->rc_override=
                av_realloc(video_enc->rc_override,
                           sizeof(RcOverride)*(i+1));
            video_enc->rc_override[i].start_frame= start;
            video_enc->rc_override[i].end_frame  = end;
            if(q>0){
                video_enc->rc_override[i].qscale= q;
                video_enc->rc_override[i].quality_factor= 1.0;
            }
            else{
                video_enc->rc_override[i].qscale= 0;
                video_enc->rc_override[i].quality_factor= -q/100.0;
            }
            p= strchr(p, '/');
            if(p) p++;
        }
        video_enc->rc_override_count=i;
        if (!video_enc->rc_initial_buffer_occupancy)
            video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size*3/4;
        video_enc->me_threshold= me_threshold;
        video_enc->intra_dc_precision= intra_dc_precision - 8;
        video_enc->strict_std_compliance = strict;

        if (do_psnr)
            video_enc->flags|= CODEC_FLAG_PSNR;

        video_enc->me_method = me_method;

        /* two pass mode */
        if (do_pass) {
            if (do_pass == 1) {
                video_enc->flags |= CODEC_FLAG_PASS1;
            } else {
                video_enc->flags |= CODEC_FLAG_PASS2;
            }
        }
    }

    /* reset some key parameters */
    video_disable = 0;
    video_codec_id = CODEC_ID_NONE;
    video_stream_copy = 0;
}

static void new_audio_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *audio_enc;
    int codec_id, i;

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);

    bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
    audio_bitstream_filters= NULL;

    if(thread_count>1)
        avcodec_thread_init(st->codec, thread_count);

    audio_enc = st->codec;
    audio_enc->codec_type = CODEC_TYPE_AUDIO;
    audio_enc->strict_std_compliance = strict;

    if(audio_codec_tag)
        audio_enc->codec_tag= audio_codec_tag;

    if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
        audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avctx_opts[CODEC_TYPE_AUDIO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if (audio_stream_copy) {
        st->stream_copy = 1;
        audio_enc->channels = audio_channels;
    } else {
        codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_AUDIO);

        for(i=0; i<opt_name_count; i++){
            const AVOption *opt;
            double d= av_get_double(avctx_opts[CODEC_TYPE_AUDIO], opt_names[i], &opt);
            if(d==d && (opt->flags&AV_OPT_FLAG_AUDIO_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                av_set_double(audio_enc, opt_names[i], d);
        }

        if (audio_codec_id != CODEC_ID_NONE)
            codec_id = audio_codec_id;
        audio_enc->codec_id = codec_id;

        if (audio_qscale > QSCALE_NONE) {
            audio_enc->flags |= CODEC_FLAG_QSCALE;
            audio_enc->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
        }
        audio_enc->thread_count = thread_count;
        audio_enc->channels = audio_channels;
    }
    audio_enc->sample_rate = audio_sample_rate;
    audio_enc->time_base= (AVRational){1, audio_sample_rate};
    if (audio_language) {
        av_strlcpy(st->language, audio_language, sizeof(st->language));
        av_free(audio_language);
        audio_language = NULL;
    }

    /* reset some key parameters */
    audio_disable = 0;
    audio_codec_id = CODEC_ID_NONE;
    audio_stream_copy = 0;
}

static void opt_new_subtitle_stream(void)
{
    AVFormatContext *oc;
    AVStream *st;
    AVCodecContext *subtitle_enc;
    int i;

    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_SUBTITLE);

    subtitle_enc = st->codec;
    subtitle_enc->codec_type = CODEC_TYPE_SUBTITLE;
    if (subtitle_stream_copy) {
        st->stream_copy = 1;
    } else {
        for(i=0; i<opt_name_count; i++){
             const AVOption *opt;
             double d= av_get_double(avctx_opts[CODEC_TYPE_SUBTITLE], opt_names[i], &opt);
             if(d==d && (opt->flags&AV_OPT_FLAG_SUBTITLE_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                 av_set_double(subtitle_enc, opt_names[i], d);
        }
        subtitle_enc->codec_id = subtitle_codec_id;
    }

    if (subtitle_language) {
        av_strlcpy(st->language, subtitle_language, sizeof(st->language));
        av_free(subtitle_language);
        subtitle_language = NULL;
    }

    subtitle_codec_id = CODEC_ID_NONE;
    subtitle_stream_copy = 0;
}

static void opt_new_audio_stream(void)
{
    AVFormatContext *oc;
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];
    new_audio_stream(oc);
}

static void opt_new_video_stream(void)
{
    AVFormatContext *oc;
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];
    new_video_stream(oc);
}

static void opt_output_file(const char *filename)
{
    AVFormatContext *oc;
    int use_video, use_audio, input_has_video, input_has_audio, i;
    AVFormatParameters params, *ap = &params;

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    oc = av_alloc_format_context();

    if (!file_oformat) {