- } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
- if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
- int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
+ } else if (pkt->pts != AV_NOPTS_VALUE ||
+ pkt->dts != AV_NOPTS_VALUE ||
+ pkt->duration ||
+ st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ int duration = pkt->duration;
+ if (!duration && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ compute_frame_duration(&num, &den, st, pc, pkt);
+ if (den && num) {
+ duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den,
+ den * (int64_t)st->time_base.num,
+ AV_ROUND_DOWN);
+ if (duration != 0 && s->packet_buffer) {
+ update_initial_durations(s, st, pkt->stream_index,
+ duration);
+ }
+ }
+ }
+
+ if(pkt->pts != AV_NOPTS_VALUE && duration){
+ int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);