vd_lavc, ad_lavc: set pkt_timebase, not time_base

These are different AVCodecContext fields. pkt_timebase is the correct
one for identifying the unit of packet/frame timestamps when decoding,
while time_base is for encoding. Some decoders also overwrite the
time_base field with some unrelated codec metadata.

pkt_timebase does not exist in Libav, so an #if is required.

2 files changed, 8 insertions, 2 deletions

diff --git a/audio/decode/ad_lavc.c b/audio/decode/ad_lavc.c
index 78d0cec807..e5c426e912 100644
--- a/audio/decode/ad_lavc.c
+++ b/audio/decode/ad_lavc.c
@@ -103,7 +103,10 @@ static int init(struct dec_audio *da, const char *decoder)
     lavc_context->refcounted_frames = 1;
     lavc_context->codec_type = AVMEDIA_TYPE_AUDIO;
     lavc_context->codec_id = lavc_codec->id;
-    lavc_context->time_base = ctx->codec_timebase;
+
+#if LIBAVCODEC_VERSION_MICRO >= 100
+    lavc_context->pkt_timebase = ctx->codec_timebase;
+#endif
 
     if (opts->downmix && mpopts->audio_output_channels.num_chmaps == 1) {
         lavc_context->request_channel_layout =
diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index 8cc5d4eca4..18cbeda4e9 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -460,7 +460,10 @@ static void init_avctx(struct dec_video *vd, const char *decoder,
     avctx->opaque = vd;
     avctx->codec_type = AVMEDIA_TYPE_VIDEO;
     avctx->codec_id = lavc_codec->id;
-    avctx->time_base = ctx->codec_timebase;
+
+#if LIBAVCODEC_VERSION_MICRO >= 100
+    avctx->pkt_timebase = ctx->codec_timebase;
+#endif
 
     avctx->refcounted_frames = 1;
     ctx->pic = av_frame_alloc();