ffmpeg.c

        MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
        for (i = 0; p; i++) {
            int start, end, q;
            int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
            if (e != 3) {
                av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
                exit_program(1);
            }
            /* FIXME realloc failure */
            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->intra_dc_precision = intra_dc_precision - 8;

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

        /* two pass mode */
        if (do_pass) {
            if (do_pass & 1) {
                video_enc->flags |= CODEC_FLAG_PASS1;
            }
            if (do_pass & 2) {
                video_enc->flags |= CODEC_FLAG_PASS2;
            }
        }

        MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_key_frames, oc, st);
        if (forced_key_frames)
            parse_forced_key_frames(forced_key_frames, ost);

        MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);

        ost->top_field_first = -1;
        MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);

#if CONFIG_AVFILTER
        MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
        if (filters)
            ost->avfilter = av_strdup(filters);
#endif
    } else {
        MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
    }

    return ost;
}

static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
{
    int n;
    AVStream *st;
    OutputStream *ost;
    AVCodecContext *audio_enc;

    ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
    st  = ost->st;

    audio_enc = st->codec;
    audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;

    if (!ost->stream_copy) {
        char *sample_fmt = NULL;

        MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);

        MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
        if (sample_fmt &&
            (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
            av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
            exit_program(1);
        }

        MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);

        ost->rematrix_volume=1.0;
        MATCH_PER_STREAM_OPT(rematrix_volume, f, ost->rematrix_volume, oc, st);
    }

    /* check for channel mapping for this audio stream */
    for (n = 0; n < o->nb_audio_channel_maps; n++) {
        AudioChannelMap *map = &o->audio_channel_maps[n];
        InputStream *ist = &input_streams[ost->source_index];
        if ((map->channel_idx == -1 || (ist->file_index == map->file_idx && ist->st->index == map->stream_idx)) &&
            (map->ofile_idx   == -1 || ost->file_index == map->ofile_idx) &&
            (map->ostream_idx == -1 || ost->st->index  == map->ostream_idx)) {
            if (ost->audio_channels_mapped < FF_ARRAY_ELEMS(ost->audio_channels_map))
                ost->audio_channels_map[ost->audio_channels_mapped++] = map->channel_idx;
            else
                av_log(NULL, AV_LOG_FATAL, "Max channel mapping for output %d.%d reached\n",
                       ost->file_index, ost->st->index);
        }
    }

    return ost;
}

static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
{
    OutputStream *ost;

    ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
    if (!ost->stream_copy) {
        av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
        exit_program(1);
    }

    return ost;
}

static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
{
    OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
    ost->stream_copy = 1;
    return ost;
}

static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
{
    AVStream *st;
    OutputStream *ost;
    AVCodecContext *subtitle_enc;

    ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
    st  = ost->st;
    subtitle_enc = st->codec;

    subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;

    return ost;
}

/* arg format is "output-stream-index:streamid-value". */
static int opt_streamid(OptionsContext *o, const char *opt, const char *arg)
{
    int idx;
    char *p;
    char idx_str[16];

    av_strlcpy(idx_str, arg, sizeof(idx_str));
    p = strchr(idx_str, ':');
    if (!p) {
        av_log(NULL, AV_LOG_FATAL,
               "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
               arg, opt);
        exit_program(1);
    }
    *p++ = '\0';
    idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
    o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
    o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
    return 0;
}

static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
{
    AVFormatContext *is = ifile->ctx;
    AVFormatContext *os = ofile->ctx;
    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(ofile->start_time - ifile->ts_offset,
                                       AV_TIME_BASE_Q, in_ch->time_base);
        int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
                           av_rescale_q(ofile->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 (copy_metadata)
            av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);

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

static int read_ffserver_streams(OptionsContext *o, AVFormatContext *s, const char *filename)
{
    int i, err;
    AVFormatContext *ic = avformat_alloc_context();

    ic->interrupt_callback = int_cb;
    err = avformat_open_input(&ic, filename, NULL, NULL);
    if (err < 0)
        return err;
    /* copy stream format */
    for(i=0;i<ic->nb_streams;i++) {
        AVStream *st;
        OutputStream *ost;
        AVCodec *codec;
        AVCodecContext *avctx;

        codec = avcodec_find_encoder(ic->streams[i]->codec->codec_id);
        ost   = new_output_stream(o, s, codec->type);
        st    = ost->st;
        avctx = st->codec;
        ost->enc = codec;

        // FIXME: a more elegant solution is needed
        memcpy(st, ic->streams[i], sizeof(AVStream));
        st->info = av_malloc(sizeof(*st->info));
        memcpy(st->info, ic->streams[i]->info, sizeof(*st->info));
        st->codec= avctx;
        avcodec_copy_context(st->codec, ic->streams[i]->codec);

        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && !ost->stream_copy)
            choose_sample_fmt(st, codec);
        else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && !ost->stream_copy)
            choose_pixel_fmt(st, codec);
    }

    avformat_close_input(&ic);
    return 0;
}

static void opt_output_file(void *optctx, const char *filename)
{
    OptionsContext *o = optctx;
    AVFormatContext *oc;
    int i, err;
    AVOutputFormat *file_oformat;
    OutputStream *ost;
    InputStream  *ist;

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

    err = avformat_alloc_output_context2(&oc, NULL, o->format, filename);
    if (!oc) {
        print_error(filename, err);
        exit_program(1);
    }
    file_oformat= oc->oformat;
    oc->interrupt_callback = int_cb;

    if (!strcmp(file_oformat->name, "ffm") &&
        av_strstart(filename, "http:", NULL)) {
        int j;
        /* special case for files sent to ffserver: we get the stream
           parameters from ffserver */
        int err = read_ffserver_streams(o, oc, filename);
        if (err < 0) {
            print_error(filename, err);
            exit_program(1);
        }
        for(j = nb_output_streams - oc->nb_streams; j < nb_output_streams; j++) {
            ost = &output_streams[j];
            for (i = 0; i < nb_input_streams; i++) {
                ist = &input_streams[i];
                if(ist->st->codec->codec_type == ost->st->codec->codec_type){
                    ost->sync_ist= ist;
                    ost->source_index= i;
                    ist->discard = 0;
                    break;
                }
            }
            if(!ost->sync_ist){
                av_log(NULL, AV_LOG_FATAL, "Missing %s stream which is required by this ffm\n", av_get_media_type_string(ost->st->codec->codec_type));
                exit_program(1);
            }
        }
    } else if (!o->nb_stream_maps) {
        /* pick the "best" stream of each type */
#define NEW_STREAM(type, index)\
        if (index >= 0) {\
            ost = new_ ## type ## _stream(o, oc);\
            ost->source_index = index;\
            ost->sync_ist     = &input_streams[index];\
            input_streams[index].discard = 0;\
        }

        /* video: highest resolution */
        if (!o->video_disable && oc->oformat->video_codec != CODEC_ID_NONE) {
            int area = 0, idx = -1;
            for (i = 0; i < nb_input_streams; i++) {
                ist = &input_streams[i];
                if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
                    ist->st->codec->width * ist->st->codec->height > area) {
                    area = ist->st->codec->width * ist->st->codec->height;
                    idx = i;
                }
            }
            NEW_STREAM(video, idx);
        }

        /* audio: most channels */
        if (!o->audio_disable && oc->oformat->audio_codec != CODEC_ID_NONE) {
            int channels = 0, idx = -1;
            for (i = 0; i < nb_input_streams; i++) {
                ist = &input_streams[i];
                if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
                    ist->st->codec->channels > channels) {
                    channels = ist->st->codec->channels;
                    idx = i;
                }
            }
            NEW_STREAM(audio, idx);
        }

        /* subtitles: pick first */
        if (!o->subtitle_disable && (oc->oformat->subtitle_codec != CODEC_ID_NONE || subtitle_codec_name)) {
            for (i = 0; i < nb_input_streams; i++)
                if (input_streams[i].st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
                    NEW_STREAM(subtitle, i);
                    break;
                }
        }
        /* do something with data? */
    } else {
        for (i = 0; i < o->nb_stream_maps; i++) {
            StreamMap *map = &o->stream_maps[i];

            if (map->disabled)
                continue;

            ist = &input_streams[input_files[map->file_index].ist_index + map->stream_index];
            if(o->subtitle_disable && ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
                continue;
            if(o->   audio_disable && ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
                continue;
            if(o->   video_disable && ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
                continue;
            if(o->    data_disable && ist->st->codec->codec_type == AVMEDIA_TYPE_DATA)
                continue;

            switch (ist->st->codec->codec_type) {
            case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
            case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
            case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
            case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
            case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
            default:
                av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
                       map->file_index, map->stream_index);
                exit_program(1);
            }

            ost->source_index = input_files[map->file_index].ist_index + map->stream_index;
            ost->sync_ist     = &input_streams[input_files[map->sync_file_index].ist_index +
                                           map->sync_stream_index];
            ist->discard = 0;
        }
    }

    /* handle attached files */
    for (i = 0; i < o->nb_attachments; i++) {
        AVIOContext *pb;
        uint8_t *attachment;
        const char *p;
        int64_t len;

        if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
            av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",
                   o->attachments[i]);
            exit_program(1);
        }
        if ((len = avio_size(pb)) <= 0) {
            av_log(NULL, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
                   o->attachments[i]);
            exit_program(1);
        }
        if (!(attachment = av_malloc(len))) {
            av_log(NULL, AV_LOG_FATAL, "Attachment %s too large to fit into memory.\n",
                   o->attachments[i]);
            exit_program(1);
        }
        avio_read(pb, attachment, len);

        ost = new_attachment_stream(o, oc);
        ost->stream_copy               = 0;
        ost->source_index              = -1;
        ost->attachment_filename       = o->attachments[i];
        ost->st->codec->extradata      = attachment;
        ost->st->codec->extradata_size = len;

        p = strrchr(o->attachments[i], '/');
        av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
        avio_close(pb);
    }

    output_files = grow_array(output_files, sizeof(*output_files), &nb_output_files, nb_output_files + 1);
    output_files[nb_output_files - 1].ctx       = oc;
    output_files[nb_output_files - 1].ost_index = nb_output_streams - oc->nb_streams;
    output_files[nb_output_files - 1].recording_time = o->recording_time;
    output_files[nb_output_files - 1].start_time     = o->start_time;
    output_files[nb_output_files - 1].limit_filesize = o->limit_filesize;
    av_dict_copy(&output_files[nb_output_files - 1].opts, format_opts, 0);

    /* check filename in case of an image number is expected */
    if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
        if (!av_filename_number_test(oc->filename)) {
            print_error(oc->filename, AVERROR(EINVAL));
            exit_program(1);
        }
    }

    if (!(oc->oformat->flags & AVFMT_NOFILE)) {
        /* test if it already exists to avoid losing precious files */
        assert_file_overwrite(filename);

        /* open the file */
        if ((err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
                              &oc->interrupt_callback,
                              &output_files[nb_output_files - 1].opts)) < 0) {
            print_error(filename, err);
            exit_program(1);
        }
    }

    if (o->mux_preload) {
        uint8_t buf[64];
        snprintf(buf, sizeof(buf), "%d", (int)(o->mux_preload*AV_TIME_BASE));
        av_dict_set(&output_files[nb_output_files - 1].opts, "preload", buf, 0);
    }
    oc->max_delay = (int)(o->mux_max_delay * AV_TIME_BASE);

    /* copy metadata */
    for (i = 0; i < o->nb_metadata_map; i++) {
        char *p;
        int in_file_index = strtol(o->metadata_map[i].u.str, &p, 0);

        if (in_file_index < 0)
            continue;
        if (in_file_index >= nb_input_files) {
            av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d while processing metadata maps\n", in_file_index);
            exit_program(1);
        }
        copy_metadata(o->metadata_map[i].specifier, *p ? p + 1 : p, oc, input_files[in_file_index].ctx, o);
    }

    /* copy chapters */
    if (o->chapters_input_file >= nb_input_files) {
        if (o->chapters_input_file == INT_MAX) {
            /* copy chapters from the first input file that has them*/
            o->chapters_input_file = -1;
            for (i = 0; i < nb_input_files; i++)
                if (input_files[i].ctx->nb_chapters) {
                    o->chapters_input_file = i;
                    break;
                }
        } else {
            av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d in chapter mapping.\n",
                   o->chapters_input_file);
            exit_program(1);
        }
    }
    if (o->chapters_input_file >= 0)
        copy_chapters(&input_files[o->chapters_input_file], &output_files[nb_output_files - 1],
                      !o->metadata_chapters_manual);

    /* copy global metadata by default */
    if (!o->metadata_global_manual && nb_input_files){
        av_dict_copy(&oc->metadata, input_files[0].ctx->metadata,
                     AV_DICT_DONT_OVERWRITE);
        if(o->recording_time != INT64_MAX)
            av_dict_set(&oc->metadata, "duration", NULL, 0);
    }
    if (!o->metadata_streams_manual)
        for (i = output_files[nb_output_files - 1].ost_index; i < nb_output_streams; i++) {
            InputStream *ist;
            if (output_streams[i].source_index < 0)         /* this is true e.g. for attached files */
                continue;
            ist = &input_streams[output_streams[i].source_index];
            av_dict_copy(&output_streams[i].st->metadata, ist->st->metadata, AV_DICT_DONT_OVERWRITE);
        }

    /* process manually set metadata */
    for (i = 0; i < o->nb_metadata; i++) {
        AVDictionary **m;
        char type, *val;
        const char *stream_spec;
        int index = 0, j, ret = 0;

        val = strchr(o->metadata[i].u.str, '=');
        if (!val) {
            av_log(NULL, AV_LOG_FATAL, "No '=' character in metadata string %s.\n",
                   o->metadata[i].u.str);
            exit_program(1);
        }
        *val++ = 0;

        parse_meta_type(o->metadata[i].specifier, &type, &index, &stream_spec);
        if (type == 's') {
            for (j = 0; j < oc->nb_streams; j++) {
                if ((ret = check_stream_specifier(oc, oc->streams[j], stream_spec)) > 0) {
                    av_dict_set(&oc->streams[j]->metadata, o->metadata[i].u.str, *val ? val : NULL, 0);
                } else if (ret < 0)
                    exit_program(1);
            }
            printf("ret %d, stream_spec %s\n", ret, stream_spec);
        }
        else {
            switch (type) {
            case 'g':
                m = &oc->metadata;
                break;
            case 'c':
                if (index < 0 || index >= oc->nb_chapters) {
                    av_log(NULL, AV_LOG_FATAL, "Invalid chapter index %d in metadata specifier.\n", index);
                    exit_program(1);
                }
                m = &oc->chapters[index]->metadata;
                break;
            default:
                av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", o->metadata[i].specifier);
                exit_program(1);
            }
            av_dict_set(m, o->metadata[i].u.str, *val ? val : NULL, 0);
        }
    }

    reset_options(o, 0);
}

/* same option as mencoder */
static int opt_pass(const char *opt, const char *arg)
{
    do_pass = parse_number_or_die(opt, arg, OPT_INT, 1, 3);
    return 0;
}

static int64_t getutime(void)
{
#if HAVE_GETRUSAGE
    struct rusage rusage;

    getrusage(RUSAGE_SELF, &rusage);
    return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
#elif HAVE_GETPROCESSTIMES
    HANDLE proc;
    FILETIME c, e, k, u;
    proc = GetCurrentProcess();
    GetProcessTimes(proc, &c, &e, &k, &u);
    return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
#else
    return av_gettime();
#endif
}

static int64_t getmaxrss(void)
{
#if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
    struct rusage rusage;
    getrusage(RUSAGE_SELF, &rusage);
    return (int64_t)rusage.ru_maxrss * 1024;
#elif HAVE_GETPROCESSMEMORYINFO
    HANDLE proc;
    PROCESS_MEMORY_COUNTERS memcounters;
    proc = GetCurrentProcess();
    memcounters.cb = sizeof(memcounters);
    GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
    return memcounters.PeakPagefileUsage;
#else
    return 0;
#endif
}

static int opt_audio_qscale(OptionsContext *o, const char *opt, const char *arg)
{
    return parse_option(o, "q:a", arg, options);
}

static void show_usage(void)
{
    av_log(NULL, AV_LOG_INFO, "Hyper fast Audio and Video encoder\n");
    av_log(NULL, AV_LOG_INFO, "usage: %s [options] [[infile options] -i infile]... {[outfile options] outfile}...\n", program_name);
    av_log(NULL, AV_LOG_INFO, "\n");
}

static int opt_help(const char *opt, const char *arg)
{
    int flags = AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM;
    av_log_set_callback(log_callback_help);
    show_usage();
    show_help_options(options, "Main options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE | OPT_GRAB, 0);
    show_help_options(options, "\nAdvanced options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE | OPT_GRAB,
                      OPT_EXPERT);
    show_help_options(options, "\nVideo options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_VIDEO);
    show_help_options(options, "\nAdvanced Video options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_VIDEO | OPT_EXPERT);
    show_help_options(options, "\nAudio options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_AUDIO);
    show_help_options(options, "\nAdvanced Audio options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_AUDIO | OPT_EXPERT);
    show_help_options(options, "\nSubtitle options:\n",
                      OPT_SUBTITLE | OPT_GRAB,
                      OPT_SUBTITLE);
    show_help_options(options, "\nAudio/Video grab options:\n",
                      OPT_GRAB,
                      OPT_GRAB);
    printf("\n");
    show_help_children(avcodec_get_class(), flags);
    show_help_children(avformat_get_class(), flags);
    show_help_children(sws_get_class(), flags);

    return 0;
}

static int opt_target(OptionsContext *o, const char *opt, const char *arg)
{
    enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
    static const char *const frame_rates[] = { "25", "30000/1001", "24000/1001" };

    if (!strncmp(arg, "pal-", 4)) {
        norm = PAL;
        arg += 4;
    } else if (!strncmp(arg, "ntsc-", 5)) {
        norm = NTSC;
        arg += 5;
    } else if (!strncmp(arg, "film-", 5)) {
        norm = FILM;
        arg += 5;
    } else {
        /* Try to determine PAL/NTSC by peeking in the input files */
        if (nb_input_files) {
            int i, j, fr;
            for (j = 0; j < nb_input_files; j++) {
                for (i = 0; i < input_files[j].nb_streams; i++) {
                    AVCodecContext *c = input_files[j].ctx->streams[i]->codec;
                    if (c->codec_type != AVMEDIA_TYPE_VIDEO)
                        continue;
                    fr = c->time_base.den * 1000 / c->time_base.num;
                    if (fr == 25000) {
                        norm = PAL;
                        break;
                    } else if ((fr == 29970) || (fr == 23976)) {
                        norm = NTSC;
                        break;
                    }
                }
                if (norm != UNKNOWN)
                    break;
            }
        }
        if (norm != UNKNOWN)
            av_log(NULL, AV_LOG_INFO, "Assuming %s for target.\n", norm == PAL ? "PAL" : "NTSC");
    }

    if (norm == UNKNOWN) {
        av_log(NULL, AV_LOG_FATAL, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
        av_log(NULL, AV_LOG_FATAL, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
        av_log(NULL, AV_LOG_FATAL, "or set a framerate with \"-r xxx\".\n");
        exit_program(1);
    }

    if (!strcmp(arg, "vcd")) {
        opt_video_codec(o, "c:v", "mpeg1video");
        opt_audio_codec(o, "c:a", "mp2");
        parse_option(o, "f", "vcd", options);

        parse_option(o, "s", norm == PAL ? "352x288" : "352x240", options);
        parse_option(o, "r", frame_rates[norm], options);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b:v", "1150000");
        opt_default("maxrate", "1150000");
        opt_default("minrate", "1150000");
        opt_default("bufsize", "327680"); // 40*1024*8;

        opt_default("b:a", "224000");
        parse_option(o, "ar", "44100", options);
        parse_option(o, "ac", "2", options);

        opt_default("packetsize", "2324");
        opt_default("muxrate", "1411200"); // 2352 * 75 * 8;

        /* We have to offset the PTS, so that it is consistent with the SCR.
           SCR starts at 36000, but the first two packs contain only padding
           and the first pack from the other stream, respectively, may also have
           been written before.
           So the real data starts at SCR 36000+3*1200. */
        o->mux_preload = (36000 + 3 * 1200) / 90000.0; // 0.44
    } else if (!strcmp(arg, "svcd")) {

        opt_video_codec(o, "c:v", "mpeg2video");
        opt_audio_codec(o, "c:a", "mp2");
        parse_option(o, "f", "svcd", options);

        parse_option(o, "s", norm == PAL ? "480x576" : "480x480", options);
        parse_option(o, "r", frame_rates[norm], options);
        parse_option(o, "pix_fmt", "yuv420p", options);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b:v", "2040000");
        opt_default("maxrate", "2516000");
        opt_default("minrate", "0"); // 1145000;
        opt_default("bufsize", "1835008"); // 224*1024*8;
        opt_default("flags", "+scan_offset");


        opt_default("b:a", "224000");
        parse_option(o, "ar", "44100", options);

        opt_default("packetsize", "2324");

    } else if (!strcmp(arg, "dvd")) {

        opt_video_codec(o, "c:v", "mpeg2video");
        opt_audio_codec(o, "c:a", "ac3");
        parse_option(o, "f", "dvd", options);

        parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
        parse_option(o, "r", frame_rates[norm], options);
        parse_option(o, "pix_fmt", "yuv420p", options);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b:v", "6000000");
        opt_default("maxrate", "9000000");
        opt_default("minrate", "0"); // 1500000;
        opt_default("bufsize", "1835008"); // 224*1024*8;

        opt_default("packetsize", "2048");  // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
        opt_default("muxrate", "10080000"); // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8

        opt_default("b:a", "448000");
        parse_option(o, "ar", "48000", options);

    } else if (!strncmp(arg, "dv", 2)) {

        parse_option(o, "f", "dv", options);

        parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
        parse_option(o, "pix_fmt", !strncmp(arg, "dv50", 4) ? "yuv422p" :
                          norm == PAL ? "yuv420p" : "yuv411p", options);
        parse_option(o, "r", frame_rates[norm], options);

        parse_option(o, "ar", "48000", options);
        parse_option(o, "ac", "2", options);

    } else {
        av_log(NULL, AV_LOG_ERROR, "Unknown target: %s\n", arg);
        return AVERROR(EINVAL);
    }
    return 0;
}

static int opt_vstats_file(const char *opt, const char *arg)
{
    av_free (vstats_filename);
    vstats_filename = av_strdup (arg);
    return 0;
}

static int opt_vstats(const char *opt, const char *arg)
{
    char filename[40];
    time_t today2 = time(NULL);
    struct tm *today = localtime(&today2);

    snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,
             today->tm_sec);
    return opt_vstats_file(opt, filename);
}

static int opt_video_frames(OptionsContext *o, const char *opt, const char *arg)
{
    return parse_option(o, "frames:v", arg, options);
}

static int opt_audio_frames(OptionsContext *o, const char *opt, const char *arg)
{
    return parse_option(o, "frames:a", arg, options);
}

static int opt_data_frames(OptionsContext *o, const char *opt, const char *arg)
{
    return parse_option(o, "frames:d", arg, options);
}

static int opt_preset(OptionsContext *o, const char *opt, const char *arg)
{
    FILE *f=NULL;
    char filename[1000], tmp[1000], tmp2[1000], line[1000];
    const char *codec_name = *opt == 'v' ? video_codec_name :
                             *opt == 'a' ? audio_codec_name :
                                           subtitle_codec_name;

    if (!(f = get_preset_file(filename, sizeof(filename), arg, *opt == 'f', codec_name))) {
        if(!strncmp(arg, "libx264-lossless", strlen("libx264-lossless"))){
            av_log(0, AV_LOG_FATAL, "Please use -preset <speed> -qp 0\n");
        }else
            av_log(0, AV_LOG_FATAL, "File for preset '%s' not found\n", arg);
        exit_program(1);
    }

    while(!feof(f)){
        int e= fscanf(f, "%999[^\n]\n", line) - 1;
        if(line[0] == '#' && !e)
            continue;
        e|= sscanf(line, "%999[^=]=%999[^\n]\n", tmp, tmp2) - 2;
        if(e){
            av_log(0, AV_LOG_FATAL, "%s: Invalid syntax: '%s'\n", filename, line);
            exit_program(1);
        }
        if(!strcmp(tmp, "acodec")){
            opt_audio_codec(o, tmp, tmp2);
        }else if(!strcmp(tmp, "vcodec")){
            opt_video_codec(o, tmp, tmp2);
        }else if(!strcmp(tmp, "scodec")){
            opt_subtitle_codec(o, tmp, tmp2);
        }else if(!strcmp(tmp, "dcodec")){
            opt_data_codec(o, tmp, tmp2);
        }else if(opt_default(tmp, tmp2) < 0){
            av_log(0, AV_LOG_FATAL, "%s: Invalid option or argument: '%s', parsed as '%s' = '%s'\n", filename, line, tmp, tmp2);
            exit_program(1);
        }
    }

    fclose(f);

    return 0;
}

static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
{
}

static int opt_passlogfile(const char *opt, const char *arg)
{
    pass_logfilename_prefix = arg;
#if CONFIG_LIBX264_ENCODER
    return opt_default("passlogfile", arg);
#else
    return 0;
#endif
}

static int opt_old2new(OptionsContext *o, const char *opt, const char *arg)
{
    char *s = av_asprintf("%s:%c", opt + 1, *opt);
    int ret = parse_option(o, s, arg, options);
    av_free(s);
    return ret;
}

static int opt_bitrate(OptionsContext *o, const char *opt, const char *arg)
{
    if(!strcmp(opt, "b")){
        av_log(0,AV_LOG_WARNING, "Please use -b:a or -b:v, -b is ambiguous\n");
        return parse_option(o, "b:v", arg, options);
    }
    return opt_default(opt, arg);
}

static int opt_qscale(OptionsContext *o, const char *opt, const char *arg)
{
    char *s;
    int ret;
    if(!strcmp(opt, "qscale")){
        av_log(0,AV_LOG_WARNING, "Please use -q:a or -q:v, -qscale is ambiguous\n");
        return parse_option(o, "q:v", arg, options);
    }
    s = av_asprintf("q%s", opt + 6);
    ret = parse_option(o, s, arg, options);
    av_free(s);
    return ret;
}

static int opt_video_filters(OptionsContext *o, const char *opt, const char *arg)
{
    return parse_option(o, "filter:v", arg, options);
}

static int opt_vsync(const char *opt, const char *arg)
{
    if      (!av_strcasecmp(arg, "cfr"))         video_sync_method = VSYNC_CFR;
    else if (!av_strcasecmp(arg, "vfr"))         video_sync_method = VSYNC_VFR;
    else if (!av_strcasecmp(arg, "passthrough")) video_sync_method = VSYNC_PASSTHROUGH;
    else if (!av_strcasecmp(arg, "drop"))        video_sync_method = VSYNC_DROP;

    if (video_sync_method == VSYNC_AUTO)
        video_sync_method = parse_number_or_die("vsync", arg, OPT_INT, VSYNC_AUTO, VSYNC_VFR);
    return 0;
}

static int opt_deinterlace(const char *opt, const char *arg)
{
    av_log(NULL, AV_LOG_WARNING, "-%s is deprecated, use -filter:v yadif instead\n", opt);
    do_deinterlace = 1;
    return 0;
}

#define OFFSET(x) offsetof(OptionsContext, x)
static const OptionDef options[] = {
    /* main options */
#include "cmdutils_common_opts.h"
    { "f", HAS_ARG | OPT_STRING | OPT_OFFSET, {.off = OFFSET(format)}, "force format", "fmt" },
    { "i", HAS_ARG | OPT_FUNC2, {(void*)opt_input_file}, "input file name", "filename" },
    { "y", OPT_BOOL, {(void*)&file_overwrite}, "overwrite output files" },
    { "n", OPT_BOOL, {(void*)&no_file_overwrite}, "do not overwrite output files" },
    { "c", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(codec_names)}, "codec name", "codec" },
    { "codec", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(codec_names)}, "codec name", "codec" },
    { "pre", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(presets)}, "preset name", "preset" },
    { "map", HAS_ARG | OPT_EXPERT | OPT_FUNC2, {(void*)opt_map}, "set input stream mapping", "[-]input_file_id[:stream_specifier][,sync_file_id[:stream_specifier]]" },
    { "map_channel", HAS_ARG | OPT_EXPERT | OPT_FUNC2, {(void*)opt_map_channel}, "map an audio channel from one stream to another", "file.stream.channel[:syncfile.syncstream]" },
    { "map_metadata", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(metadata_map)}, "set metadata information of outfile from infile",
      "outfile[,metadata]:infile[,metadata]" },
    { "map_chapters",  OPT_INT | HAS_ARG | OPT_EXPERT | OPT_OFFSET, {.off = OFFSET(chapters_input_file)},  "set chapters mapping", "input_file_index" },
    { "t", HAS_ARG | OPT_TIME | OPT_OFFSET, {.off = OFFSET(recording_time)}, "record or transcode \"duration\" seconds of audio/video", "duration" },
    { "fs", HAS_ARG | OPT_INT64 | OPT_OFFSET, {.off = OFFSET(limit_filesize)}, "set the limit file size in bytes", "limit_size" }, //
    { "ss", HAS_ARG | OPT_TIME | OPT_OFFSET, {.off = OFFSET(start_time)}, "set the start time offset", "time_off" },
    { "itsoffset", HAS_ARG | OPT_TIME | OPT_OFFSET, {.off = OFFSET(input_ts_offset)}, "set the input ts offset", "time_off" },
    { "itsscale", HAS_ARG | OPT_DOUBLE | OPT_SPEC, {.off = OFFSET(ts_scale)}, "set the input ts scale", "scale" },
    { "timestamp", HAS_ARG | OPT_FUNC2, {(void*)opt_recording_timestamp}, "set the recording timestamp ('now' to set the current time)", "time" },
    { "metadata", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(metadata)}, "add metadata", "string=string" },
    { "dframes", HAS_ARG | OPT_FUNC2, {(void*)opt_data_frames}, "set the number of data frames to record", "number" },
    { "benchmark", OPT_BOOL | OPT_EXPERT, {(void*)&do_benchmark},
      "add timings for benchmarking" },
    { "timelimit", HAS_ARG, {(void*)opt_timelimit}, "set max runtime in seconds", "limit" },
    { "dump", OPT_BOOL | OPT_EXPERT, {(void*)&do_pkt_dump},
      "dump each input packet" },
    { "hex", OPT_BOOL | OPT_EXPERT, {(void*)&do_hex_dump},
      "when dumping packets, also dump the payload" },
    { "re", OPT_BOOL | OPT_EXPERT | OPT_OFFSET, {.off = OFFSET(rate_emu)}, "read input at native frame rate", "" },
    { "target", HAS_ARG | OPT_FUNC2, {(void*)opt_target}, "specify target file type (\"vcd\", \"svcd\", \"dvd\", \"dv\", \"dv50\", \"pal-vcd\", \"ntsc-svcd\", ...)", "type" },
    { "vsync", HAS_ARG | OPT_EXPERT, {(void*)opt_vsync}, "video sync method", "" },
    { "async", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&audio_sync_method}, "audio sync method", "" },
    { "adrift_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT, {(void*)&audio_drift_threshold}, "audio drift threshold", "threshold" },
    { "copyts", OPT_BOOL | OPT_EXPERT, {(void*)&copy_ts}, "copy timestamps" },
    { "copytb", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&copy_tb}, "copy input stream time base when stream copying", "source" },
    { "shortest", OPT_BOOL | OPT_EXPERT, {(void*)&opt_shortest}, "finish encoding within shortest input" }, //
    { "dts_delta_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT, {(void*)&dts_delta_threshold}, "timestamp discontinuity delta threshold", "threshold" },
    { "xerror", OPT_BOOL, {(void*)&exit_on_error}, "exit on error", "error" },
    { "copyinkf", OPT_BOOL | OPT_EXPERT | OPT_SPEC, {.off = OFFSET(copy_initial_nonkeyframes)}, "copy initial non-keyframes" },
    { "frames", OPT_INT64 | HAS_ARG | OPT_SPEC, {.off = OFFSET(max_frames)}, "set the number of frames to record", "number" },
    { "tag",   OPT_STRING | HAS_ARG | OPT_SPEC, {.off = OFFSET(codec_tags)}, "force codec tag/fourcc", "fourcc/tag" },
    { "q", HAS_ARG | OPT_EXPERT | OPT_DOUBLE | OPT_SPEC, {.off = OFFSET(qscale)}, "use fixed quality scale (VBR)", "q" },
    { "qscale", HAS_ARG | OPT_EXPERT | OPT_FUNC2, {(void*)opt_qscale}, "use fixed quality scale (VBR)", "q" },
#if CONFIG_AVFILTER
    { "filter", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(filters)}, "set stream filterchain", "filter_list" },
#endif
    { "stats", OPT_BOOL, {&print_stats}, "print progress report during encoding", },
    { "attach", HAS_ARG | OPT_FUNC2, {(void*)opt_attach}, "add an attachment to the output file", "filename" },
    { "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(dump_attachment)}, "extract an attachment into a file", "filename" },

    /* video options */
    { "vframes", HAS_ARG | OPT_VIDEO | OPT_FUNC2, {(void*)opt_video_frames}, "set the number of video frames to record", "number" },
    { "r", HAS_ARG | OPT_VIDEO | OPT_STRING | OPT_SPEC, {.off = OFFSET(frame_rates)}, "set frame rate (Hz value, fraction or abbreviation)", "rate" },
    { "s", HAS_ARG | OPT_VIDEO | OPT_STRING | OPT_SPEC, {.off = OFFSET(frame_sizes)}, "set frame size (WxH or abbreviation)", "size" },
    { "aspect", HAS_ARG | OPT_VIDEO | OPT_STRING | OPT_SPEC, {.off = OFFSET(frame_aspect_ratios)}, "set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)", "aspect" },
    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_STRING | OPT_SPEC, {.off = OFFSET(frame_pix_fmts)}, "set pixel format", "format" },
    { "bits_per_raw_sample", OPT_INT | HAS_ARG | OPT_VIDEO, {(void*)&frame_bits_per_raw_sample}, "set the number of bits per raw sample", "number" },
    { "croptop",  HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropbottom", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropleft", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropright", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "padtop", HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padbottom", HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padleft", HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padright", HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padcolor", HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "color" },
    { "intra", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&intra_only}, "use only intra frames"},
    { "vn", OPT_BOOL | OPT_VIDEO | OPT_OFFSET, {.off = OFFSET(video_disable)}, "disable video" },
    { "vdt", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)&video_discard}, "discard threshold", "n" },
    { "rc_override", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_STRING | OPT_SPEC, {.off = OFFSET(rc_overrides)}, "rate control override for specific intervals", "override" },
    { "vcodec", HAS_ARG | OPT_VIDEO | OPT_FUNC2, {(void*)opt_video_codec}, "force video codec ('copy' to copy stream)", "codec" },
    { "sameq", OPT_BOOL | OPT_VIDEO, {(void*)&same_quant}, "use same quantizer as source (implies VBR)" },
    { "same_quant", OPT_BOOL | OPT_VIDEO, {(void*)&same_quant},