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Originally Posted by TECK
So if I want to extract a DTS file for example, it is recommended to use ArcSoft with eac3to instead of libav? I guess eac3to downmixes the the 7 channels to 5.1 automatically.
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ArcSoft is a certified decoder and support DTS-HD, libav or NicAudio are free soft, can't decode DTS-HD only the 'core' (standard DTS) and can't be certified.
eac3to need a parameter (-down6) to downmix 6.1/7.1 to 5.1, and for 6.1 have a bug remaping channels and need other remap parameter.
Then for 6.1 input you need type (in '+ Options' column of HD Streams Extractor'):
-0,1,2,3,5,6,4 -down6
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I noticed something weird, tebasuna51. If I have a proper 5.1 channels DTS file and encode it with NicAudio while keeping the same channels etc. but with a constant bitrate, Nero marks the AAC file with a constant bitrate of 640. However, if I use the audio sample, Nero marks the audio file with a variable bitrate.
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But, what is your problem with AAC VBR?
Is better than CBR and supported without problems in mp4/mkv containers.
Now there are other AAC encoders than Nero (QuickTime or Winamp-Fgh) but I never test CBR, I always use VBR.