search for real extradata start instead of always skipping one byte.
Patch by Andrew Dennison gmailify(${name}d, lists)
Thread: [PATCH] Fix VC1 "Incomplete extradata" for mkv files generated by eac3to
Originally committed as revision 20178 to svn://svn.ffmpeg.org/ffmpeg/trunk
}
buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- if(start[0]) start++; // in WVC1 extradata first byte is its size
+ start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
next = start;
for(; next < end; start = next){
next = find_next_marker(start + 4, end);