avcodec: for audio encoding, set packet dts to packet pts.

There are no audio encoders which do frame reordering.

avconv.c

@@ -991,6 +991,8 @@ static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
     if (got_packet) {
         if (pkt.pts != AV_NOPTS_VALUE)
             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
+        if (pkt.dts != AV_NOPTS_VALUE)
+            pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
         if (pkt.duration > 0)
             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
 

libavcodec/utils.c

@@ -873,13 +873,15 @@ int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
     if (avctx->codec->encode2) {
         *got_packet_ptr = 0;
         ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
-        if (!ret && *got_packet_ptr &&
-            !(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
+        if (!ret && *got_packet_ptr) {
+            if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
                 avpkt->pts = frame->pts;
                 avpkt->duration = av_rescale_q(frame->nb_samples,
                                                (AVRational){ 1, avctx->sample_rate },
                                                avctx->time_base);
             }
+            avpkt->dts = avpkt->pts;
+        }
     } else {
         /* for compatibility with encoders not supporting encode2(), we need to
            allocate a packet buffer if the user has not provided one or check
@@ -925,7 +927,7 @@ int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
                     av_freep(&avpkt->data);
             } else {
                 if (avctx->coded_frame)
-                    avpkt->pts = avctx->coded_frame->pts;
+                    avpkt->pts = avpkt->dts = avctx->coded_frame->pts;
                 /* Set duration for final small packet. This can be removed
                    once all encoders supporting CODEC_CAP_SMALL_LAST_FRAME use
                    encode2() */