HowTo Convert WMV 5.1 audio to ac3 5.1 audio

[john blox]

Hi hope someone can help. I've spent > 8 hours trying to do this and have failed. I've tried foobar2000, vegas, besweet + many others as suggested by various howto's on doom9 and via google but for me nothing works. I've spent years writing video software myself, so am no newbie but can make no progress with this. My goal is to create a matroska file containing the original wmv video but with the wma audio within the wmv file re-encoded audio as a 5.1 ac3 stream that can be decoded via ac3 pass through by my amp.

foobar seems to 'claim' its stereo audio but I know it's 100% definately 5.1 audio. I may just wipe the file and avoid wmv's in future if there's no workable solution, it's very frustrating.

Cheers

[tebasuna51]

I can transcode the 5.1 audio from wmv using DirectShowSource() method from AviSynth and after SoundOut/BeHappy/Wavi to output multichannel wav or ac3 with Aften.

But DirectShow can work or not in your machine. Good luck.

[john blox]

DirectShowSource() method from AviSynth didn't work on 1 pc I tried another pc where it worked BUT gave me a stereo audio file not 5.1. File properties tells me it's 5.1 so it's as if whatever it's going through is auto-downsampling it to stereo, which is the whole reason for wishing to escape from wma format in the first place.

[patul]

Render it in Graphedit and dump out the audio stream to WAV using WavDest and File Writer filters?


P.S. Haven't try with 5.1 WMV though.

[tebasuna51]

Render it in Graphedit and dump out the audio stream to WAV using WavDest and File Writer filters?

Is equivalent to DirectShowSource() in AviSynth.

With Graphedit we can select the filters instead let do the job automatically, but here don't have to much filters to decode WMV audio to select.

[ACrowley]

I pers use Steinberg Nuendo 3 to decode WMA to 6 mono waves. Then i use directly the build in Steinberg DD Encoder for AC3 Export, works perfect in maximal Quality

[Usa1955]

I've also tried it in GraphEdit. This worked only so far, that I'm having a stereo WAV file instead of a multichannel one.