Quote:
Originally Posted by foxyshadis
mkvmerge won't enforce an IDR (closed GOP) split.
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That's correct. mkvmerge doesn't distinguish between IDR-type key frames and non IDR-type keyframes outside of the MPEG4 p10 handling code. And the splitting code is a layer or two above that code.
Modifying this to pass extra information up to that layer (e.g. "splitting possible before this frame?") would not be that hard, but I won't spend more time on this until it's been officially accepted into x264. Other things to do as well