static int mov_write_identification(AVIOContext *pb, AVFormatContext *s)
{
    MOVMuxContext *mov = s->priv_data;
    int i;

    mov_write_ftyp_tag(pb,s);
    if (mov->mode == MODE_PSP) {
        int video_streams_nb = 0, audio_streams_nb = 0, other_streams_nb = 0;
        for (i = 0; i < s->nb_streams; i++) {
            AVStream *st = s->streams[i];
            if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
                video_streams_nb++;
            else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
                audio_streams_nb++;
            else
                other_streams_nb++;
            }

        if (video_streams_nb != 1 || audio_streams_nb != 1 || other_streams_nb) {
            av_log(s, AV_LOG_ERROR, "PSP mode need one video and one audio stream\n");
            return AVERROR(EINVAL);
        }
        return mov_write_uuidprof_tag(pb, s);
    }
    return 0;
}
Unknown