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Digital Audio/Video => Movie/Multichannel audio => Topic started by: ZinCh on 2008-02-02 12:46:42

Title: How to replace 1 channel in 5:1 AC3?
Post by: ZinCh on 2008-02-02 12:46:42
Is it possible to replace one channel of 5:1 AC3 file without re-encoding its other channels?

Is it even possible to work with AC3 channels without re-encoding?
Title: How to replace 1 channel in 5:1 AC3?
Post by: Brother John on 2008-02-02 21:46:20
Since AC3 makes heavy use of channel coupling this might only be possible under very specific circumstances, if at all. At least you need an in depth analysis of your file to find out which channels are coupled. I’m not aware of any software tools though.
Title: How to replace 1 channel in 5:1 AC3?
Post by: mcbear on 2008-02-12 09:49:05
I'd guess that would mean something like bitstream-editing, and you  need to provide that channel that you would like to replace in exactly the format that it fits in. And there is, as already mentioned, the channel coupling, and last but not least the CRC checksums. So, in short terms: it is not really possible ! Decoding, replacing one channel and re-encoding is what you will have to do.
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