muxavformat: Inform muxer of encoder delay

initial_padding is used to inform libav muxers of initial encoder delay
duration.  When set for mkv it can be used to remove the silence samples
during playback since the delay value gets stored in the mkv CodecDelay
element.

1 files changed, 2 insertions, 0 deletions

diff --git a/libhb/muxavformat.c b/libhb/muxavformat.c
index 729e6c672..6c56f8a5f 100644
--- a/libhb/muxavformat.c
+++ b/libhb/muxavformat.c
@@ -401,6 +401,8 @@ static int avformatInit( hb_mux_object_t * m )
         }
 
         track->st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+        track->st->codecpar->initial_padding = audio->priv.config.init_delay *
+                                        audio->config.out.samplerate / 90000;
         if (job->mux == HB_MUX_AV_MP4)
         {
             track->st->time_base.num = 1;