Sunday, January 6, 2013

LPCM audio in MKVs

Got this from avsforum looking for a solution for LPCM audio tracks in mkv files. Thanks to Lush78 for this post
http://www.avsforum.com/t/1407589/makemkv-and-lpcm-audio 

This post is to share some information and the solution to the problems I was having with MakeMKV and Blu-rays with LPCM audio.

When remuxing Blu-rays containing LPCM audio with MakeMKV, I would not be able to playback the LPCM audio track using anything, including VLC on PC, Popcorn Hour c200, Boxee Box, etc. MakeMKV sets the Codec ID to "A_MS/ACM" which is a very uncommon codec.

  1. To solve this problem, open MKVmerge GUI, and go to File -> Header Editor. 
  2. Then go to File -> Open and browse to your MKV. 
  3. Scroll down to the audio track that contains the LPCM audio and change the Codec ID from "A_MS/ACM" to "A_PCM/INT/LIT". 
  4. Then File -> Save. 


Your MKV will now contain an LPCM audio track that should be compatible with any software or hardware capable of playing MKV files... Hope this helps...

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