av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
framerate.num, framerate.den);
av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
framerate.num, framerate.den);