if (!st->r_frame_rate.num) {
if ( avctx->time_base.den * (int64_t) st->time_base.num
<= avctx->time_base.num * avctx->ticks_per_frame * (int64_t) st->time_base.den) {
- st->r_frame_rate.num = avctx->time_base.den;
- st->r_frame_rate.den = avctx->time_base.num * avctx->ticks_per_frame;
+ av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
+ avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
} else {
st->r_frame_rate.num = st->time_base.den;
st->r_frame_rate.den = st->time_base.num;