Function av_transcode

ffmpeg.c:1749–2500

* The following code is the main loop of the file converter */

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

    file_table= av_mallocz(nb_input_files * sizeof(AVInputFile));
    if (!file_table)
        goto fail;

    /* input stream init */
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        file_table[i].ist_index = j;
        file_table[i].nb_streams = is->nb_streams;
        j += is->nb_streams;
    }
    nb_istreams = j;

    ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
    if (!ist_table)
        goto fail;

    for(i=0;i<nb_istreams;i++) {
        ist = av_mallocz(sizeof(AVInputStream));
        if (!ist)
            goto fail;
        ist_table[i] = ist;
    }
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        for(k=0;k<is->nb_streams;k++) {
            ist = ist_table[j++];
            ist->st = is->streams[k];
            ist->file_index = i;
            ist->index = k;
            ist->discard = 1; /* the stream is discarded by default
                                 (changed later) */

            if (rate_emu) {
                ist->start = av_gettime();
            }
        }
    }