printf("sde w:%d, h:%d\n", w, h);
av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1){    MpegEncContext *s= &s1->mpeg_enc_ctx;    int color_description, w, h;    skip_bits(&s->gb, 3); /* video format */    color_description= get_bits1(&s->gb);    if(color_description){        skip_bits(&s->gb, 8); /* color primaries */        skip_bits(&s->gb, 8); /* transfer_characteristics */        skip_bits(&s->gb, 8); /* matrix_coefficients */    }    w= get_bits(&s->gb, 14);    skip_bits(&s->gb, 1); //marker    h= get_bits(&s->gb, 14);    skip_bits(&s->gb, 1); //marker        s1->pan_scan.width= 16*w;    s1->pan_scan.height=16*h;    if(s->aspect_ratio_info > 1)        s->avctx->sample_aspect_ratio=             av_div_q(                mpeg2_aspect[s->aspect_ratio_info],                 (AVRational){w, h}            );        if(s->avctx->debug & FF_DEBUG_PICT_INFO)        printf("sde w:%d, h:%d\n", w, h);}