... matroska is based on timestamps and doesnt know any interleaving, so the settings have no meaning when MKV is used as container ....

How much do you want to risk on that I can create a matroska file which is interleaved so crappily that it doesn't play properly, even though it meets the specs?

I know, we really need to add something to the specs specifying a requirement for data to always be interleaved by progressive timestamp.

That would make many older AVI-Mux GUI created files invalid, which are not muxed that way: Older versions created files with about 100ms video blocks (or 120ms for 25 fps) and then added the audio, like video: 0 video: 40 video: 80 video: 120 audio: 0 audio: 32 audio: 64 audio: 96 audio: 128 ... ... The order of audio and video might be vice versa. Also, you would kill the idea of 'native mpeg4' ;)

Yeah, like all files (written with a b0rked version of libebml) containing void elements that were supposed to be 127 bytes :devil:

The p'taghs at ahead have even written invalid ISO file systems in one version, so I'd go for blaming them (and only them....)

I'll tell you if there are any as soon as you get me that file format docu :devil:

Hi Alex, Is there anything (links etc) on these web pages that might help you? Cheers