mkvmerge apparrently uses it for mpeg1/2 video, but it contains the same
information as CodecPrivate, so it can be ignored.
---
libavformat/matroska.h | 1 +
libavformat/matroskadec.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/libavformat/matroska.h b/libavformat/matroska.h
index b1f7ae4..0dbc724 100644
--- a/libavformat/matroska.h
+++ b/libavformat/matroska.h
@@ -176,6 +176,7 @@
#define MATROSKA_ID_BLOCK 0xA1
#define MATROSKA_ID_BLOCKDURATION 0x9B
#define MATROSKA_ID_BLOCKREFERENCE 0xFB
+#define MATROSKA_ID_CODECSTATE 0xA4
/* IDs in the attachments master */
#define MATROSKA_ID_ATTACHEDFILE 0x61A7
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 744f7c0..3b801e0 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -500,6 +500,7 @@ static EbmlSyntax matroska_blockgroup[] = {
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0,
offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
{ MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0,
offsetof(MatroskaBlock,reference) },
+ { MATROSKA_ID_CODECSTATE, EBML_NONE },
{ 1, EBML_UINT, 0,
offsetof(MatroskaBlock,non_simple), {.u=1} },
{ 0 }
};
--
1.7.10.4
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