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Old 17th April 2006, 10:47   #1  |  Link
Eastermeyer
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Channel Mapping in WMEncoder

Hi !

I would like to test Microsoft's WMV-Format.
I am using the Windows Media Encoder.

If I would like to Encode WMA with 5.1 I have to use a Multichannel WAV File.

My source is a AC3-File and so I have to decode it to WAV.
I'm using BeSweet for this. In which order i have to write the WAV's to the .mux-File , to get correct Channel Mapping in the Windows Media Encoder ?

What quality is given by BeSweet ? 16bit ? 24bit ?
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Old 17th April 2006, 15:02   #2  |  Link
dohcmark8
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You have to use seperate mono WAV files for WME... you cannot use one multichannel WAV in WME.

Set BeSweet to convert to six discrete mono WAV files and then fire up WME and choose custom session, then in the sources tab choose 'Multichannel WAV source' for audio and then hit configure... and in there you add the WAVs seperately, as long as you do it in the right order your channels will be in the proper order.
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Old 17th April 2006, 16:02   #3  |  Link
Eastermeyer
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Thanks !

Do you know what resolution AC3 got ?
16bit 24bit or 32bit ?
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Old 17th April 2006, 16:19   #4  |  Link
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AC3 should be 16-bit 48khz most of the time.
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Old 17th April 2006, 16:32   #5  |  Link
Eastermeyer
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Thank you very much !
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Old 17th April 2006, 18:54   #6  |  Link
diogen
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Quote:
Originally Posted by dohcmark8
You have to use seperate mono WAV files for WME....
To encode AC3 into WMA Pro (multichannel) you don't have to feed the encoder 6 mono WAV files -
just put AC3Filter in the graph and use AC3 soundtrack as is.
That is the way it works for me.

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Old 18th April 2006, 01:50   #7  |  Link
zambelli
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Quote:
Originally Posted by diogen
To encode AC3 into WMA Pro (multichannel) you don't have to feed the encoder 6 mono WAV files -
just put AC3Filter in the graph and use AC3 soundtrack as is.
That is the way it works for me.
That will work only if the AC3 decoder is decoding to 6 discrete channels. Not all of them do, certainly not on all setups.
BeSweet to mono .wav files is a fail safe method.
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Old 18th April 2006, 06:16   #8  |  Link
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There is an alternative...

NicAudio avisynth plugin + avs script + Nic's WMEncoder.

Something like that :
Code:
#NicDTSSource("E:\DVDVolume\VIDEO_TS\Sample.dts")
NicAC3Source("E:\Sample_6ch.ac3")
In this case, wav decoding is not needed.

For channels mapping, iirc this is the same pattern as WAV [FL, FR ,C, LFE, SL, SR].
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