diff options
Diffstat (limited to 'libavformat/matroskaenc.c')
| -rw-r--r-- | libavformat/matroskaenc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c index 0448253..5e2127d 100644 --- a/libavformat/matroskaenc.c +++ b/libavformat/matroskaenc.c @@ -164,6 +164,9 @@ typedef struct MatroskaMuxContext { int allow_raw_vfw; } MatroskaMuxContext; +/** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint, + * 8 byte for "matroska" doctype string */ +#define MAX_EBML_HEADER_SIZE 35 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit * offset, 4 bytes for target EBML ID */ @@ -1886,7 +1889,7 @@ static int mkv_write_header(AVFormatContext *s) ret = AVERROR(ENOMEM); goto fail; } - ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0); + ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE); put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1); put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1); put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4); |
