static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov)
static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov, AVFormatContext *s)
static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov){    int pos, i;    pos = url_ftell(pb);    put_be32(pb, 0); /* size placeholder*/    put_tag(pb, "moov");    mov->timescale = globalTimescale;    for (i=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].entry <= 0) continue;        if(mov->tracks[i].enc->codec_type == CODEC_TYPE_VIDEO) {            mov->tracks[i].timescale = mov->tracks[i].enc->frame_rate;            mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_rate_base;        }        else if(mov->tracks[i].enc->codec_type == CODEC_TYPE_AUDIO) {            /* If AMR, track timescale = 8000, AMR_WB = 16000 */            if(mov->tracks[i].enc->codec_id == CODEC_ID_AMR_NB) {                mov->tracks[i].sampleDuration = 160;  // Bytes per chunk                mov->tracks[i].timescale = 8000;            }            else {                mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;                mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;            }        }        mov->tracks[i].trackDuration =             mov->tracks[i].sampleCount * mov->tracks[i].sampleDuration;        mov->tracks[i].time = mov->time;        mov->tracks[i].trackID = i+1;    }    mov_write_mvhd_tag(pb, mov);    //mov_write_iods_tag(pb, mov);    for (i=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].entry > 0) {            mov_write_trak_tag(pb, &(mov->tracks[i]));        }    }    return updateSize(pb, pos);}