av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
av_dlog(s, "timescale %d\n", st->time_base.den);
av_dlog(s, "frame rate %d/%d\n",
av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
av_dlog(s, "timescale %d\n", st->time_base.den);
av_dlog(s, "frame rate %d/%d\n",