[issue314] Matroska: missing Codec Private data

Aurelien Jacobs <aurel <at> gnuage.org> added the comment:

I must admit I almost never compile with libx264, so I didn't test this.
I only tested remuxing from a mp4 file to a matroska file, and it seems to work
fine.
(CodecPrivate length is much more reasonable than with libx264)

Could you please try something like this:
ffmpeg -y -i sample.mp4 -an -vcodec copy b.mkv
If this works, then the bug is most probably in libx264 extradata generation.

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