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[Help] Demux audio from m2ts not the same using diff app
post Dec 17 2011, 21:24
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I have a m2ts file with video and LCPM audio.
I tried to demux the LPCM audio stream using TsMuxer, VLC & Audacity (open m2ts and export as wave).
I notice that all the 3 app give me wave file that are slightly different from one another.
(but all 3 apps give me 16bit 48kHz wave)

For a start, file size are slight different.
When i open the wave file in Audacity, the waveform are slightly different as well.
If i perform a binary compare, the whole files are totally different.
(if its a offset issue, i normally only see differences at the start or end of the file)

Any possibility of the above apps processing the raw audio differently ?

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post Mar 10 2012, 15:25
Post #2

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Use http://hank315.nl/ DGMPGDecode package. DGDecode should demux to a .pcm file for you. You can then convert that using SoX, NicLPCMSource() + SoundOut() in Avisynth, etc.
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