Codec ID: A_PCM/INT/LIT instead A_MS/ACM

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tebasuna51
Posts: 16
Joined: Fri Oct 10, 2014 9:58 am

Codec ID: A_PCM/INT/LIT instead A_MS/ACM

#1 Post by tebasuna51 » Fri Mar 25, 2022 1:52 pm

Please use the Codec ID: A_PCM/INT/LIT when create mkv tracks from PCM bluray tracks, instead A_MS/ACM.

Many demuxers work fine with A_MS/ACM but MkvExtract reject that Codec ID to extract WAV/W64 files, and I think the reference must be the MkvToolNix tools.

More info and sample.

dcoke22
Posts: 3082
Joined: Wed Jul 22, 2020 11:25 pm

Re: Codec ID: A_PCM/INT/LIT instead A_MS/ACM

#2 Post by dcoke22 » Fri Mar 25, 2022 3:29 pm

I was curious about this, so I searched through all of my rips. Some of them do have the Codec ID: A_PCM/INT/LIT, but others have the A_MS/ACM.

All the rips I have with the Codec ID: A_PCM/INT/LIT all seem to be for audio tracks that are either mono or stereo. The multichannel tracks have the other codec ID.

tebasuna51
Posts: 16
Joined: Fri Oct 10, 2014 9:58 am

Re: Codec ID: A_PCM/INT/LIT instead A_MS/ACM

#3 Post by tebasuna51 » Mon Mar 28, 2022 11:44 am

You are right, with mono or stereo files we don't need know the ChannelMask of the PCM data, with multichannel we need the A_MS/ACM Codec Private data to store that info.

Maybe the correct behaviour is remain using A_MS/ACM and improve other soft begining by mkvmerge and mkvextract.

I write to MKVToolNix developper about this: https://forum.doom9.org/showthread.php? ... ost1966534

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