Changing mkv track header info result - unplayable

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setarip_old
Posts: 2136
Joined: Wed Dec 09, 2009 1:31 pm

Re: Changing mkv track header info result - unplayable

Post by setarip_old »

Hi!

I don't know if the following is relevant but, I seem to recall that a while back (perhaps several months ago), there was a big brouhaha resulting from "MKVMerge/Toolnix" changing its output from a "full" header" to a "compressed" header that was other than fully compatible with "MKVMerge/Toolnix" files created with "full" headers.

I wonder if this could have anything to do with what you're experiencing...
Chetwood
Posts: 992
Joined: Mon Aug 30, 2010 9:16 am

Re: Changing mkv track header info result - unplayable

Post by Chetwood »

Doubtful. Mosu will make sure that newer versions of MKVToolnix can read all previously authored MKVs.
MultiMakeMKV: MakeMKV batch processing (Win)
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setarip_old
Posts: 2136
Joined: Wed Dec 09, 2009 1:31 pm

Re: Changing mkv track header info result - unplayable

Post by setarip_old »

@Chetwood

Hi!

I believe you'll find posts referring to this situation in "Mosu's" thread at the Doom9 Forums...
Chetwood
Posts: 992
Joined: Mon Aug 30, 2010 9:16 am

Re: Changing mkv track header info result - unplayable

Post by Chetwood »

URL or it didn't happen ;)
MultiMakeMKV: MakeMKV batch processing (Win)
MultiShrink: DVD Shrink batch processing
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DiscoVision
Posts: 3
Joined: Thu Feb 20, 2025 2:56 am

Re: Changing mkv track header info result - unplayable

Post by DiscoVision »

I'm going to resurrect this thread. I have found I can change the name of the audio channels without any problem. However, if I add the 'Commentary Track' element (flag) to ANY track, the resultant MKV file will not play in anything other than VLC. IMO, VLC isn't the end-all player. If none of the built in windows players (including windows explorer) recognize the file as valid.

I have just 'restored' a file which I had flagged 4 separate tracks with the "Commentary Track" flag by simply removing the element. But I had to remove it from all 4 tracks before the file will work in Windows and Plex.
dcoke22
Posts: 3726
Joined: Wed Jul 22, 2020 11:25 pm

Re: Changing mkv track header info result - unplayable

Post by dcoke22 »

DiscoVision wrote:
Thu Jun 12, 2025 9:37 pm
I'm going to resurrect this thread. I have found I can change the name of the audio channels without any problem. However, if I add the 'Commentary Track' element (flag) to ANY track, the resultant MKV file will not play in anything other than VLC. IMO, VLC isn't the end-all player. If none of the built in windows players (including windows explorer) recognize the file as valid.

I have just 'restored' a file which I had flagged 4 separate tracks with the "Commentary Track" flag by simply removing the element. But I had to remove it from all 4 tracks before the file will work in Windows and Plex.
The Commentary Flag is a Matroska v4 element. It could be the case that some players don't know how to correctly parse a v4 file.
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