Only write extradata if it exists

Originally committed as revision 10328 to svn://svn.ffmpeg.org/ffmpeg/trunk
18 years ago · 8bea4aee4f
parent 07918a227a
commit 8bea4aee4f
1 changed files with 1 additions and 1 deletions
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@ -420,7 +420,7 @@ static int mkv_write_tracks(AVFormatContext *s)
            if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA) {
                if (put_xiph_codecpriv(pb, codec) < 0)
                    return -1;
-            } else {
+            } else if (codec->extradata_size) {
                put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codec->extradata, codec->extradata_size);
            }
        }