WMV-HD with WMA5.1 to MPEG2 with AC3?

[mmace]

does anyone know how I can convert the audio within a WMV-HD 1080p file (which has wma 5.1) to AC3 5.1?
I'm pretty certain I know how to convert the video with FFMpeg but I'm still a newbie and have no idea about the audio.

Any help would be very much appreciated

[xxx666yyy777]

1. Extract the audio using the Microsoft Media Stream Editor
2. Use it as a DirectShow input in BeHappy http://forum.doom9.org/showthread.php?t=104686

[mmace]

any idea how to use it?
that page goes right over my head!

I do what I think I should and get the following:

Starting job 4.wma->4.ac3
Found Audio Stream
Channels=6, BitsPerSample=24 int, SampleRate=48000Hz
encoder\ffmpeg.exe -i - -y -acodec ac3 -ab 384 "E:\4.ac3"
Error: System.ApplicationException: Can't start encoder: The system cannot find the file specified ---> System.ComponentModel.Win32Exception: The system cannot find the file specified
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at BeHappy.Encoder.createEncoderProcess(AviSynthClip x)
--- End of inner exception stack trace ---
at BeHappy.Encoder.createEncoderProcess(AviSynthClip x)
at BeHappy.Encoder.encode()

plus, I tried to follow the installation instructions but there's no "NicAudio.dll" in the download!

[tebasuna51]

any idea how to use it?
that page goes right over my head!

I do what I think I should and get the following:

plus, I tried to follow the installation instructions but there's no "NicAudio.dll" in the download!

Use the last shon3i BeHappy package (http://forum.doom9.org/showthread.php?p=758076#post758076) (include Nicaudio.dll, ffmpeg.exe, aften.exe, ...)
The error is because 'The system cannot find...' ffmpeg.exe

You don't need nicaudio.dll (ac3 decoder) for this process. Also ffmpeg is not recommended to encode ac3, use Aften instead.