eac3to issue "this track is not clean"

[marcio]

I am trying to downmix this 5.1 ac3 track with

eac3to a.ac3 a.wav -down2 -normalize

but I am getting this

This track is not clean.

and the resulting wave file will play only the first 10 minutes and then stop. (original ac3 was 2 hours long)

Can someone help me? Is there a fix / workarround? If so, what is the correct way to fix this issue?

Thanks.

[Guest]

Did you by chance cut something to make the AC3 track? If so, please describe the source and how you cut it. I ask because a similar issue has been reported for demuxed audio for a project range in DGIndexNV.

[marcio]

No, the ac3 track comes from a retail DVD and it is untouched.
It was demuxed from the DVD with dgmpgdec158.

[Guest]

In a way that's good news, because it means my version of the problem may be in EAC3TO and not my demuxing in DGIndexNV.

I often use DelayCut to test AC3 files. Open it in there and try to process it. See if any errors are reported.

[marcio]

eac3to was using the nero ac3 decoder by default. Looks like the problem was solved by using the libav ac3 decoder. I still got the warning "This track is not clean." with the libav ac3 decoder, but now the resulting wave file plays just fine.

eac3to v3.24
command line: eac3to c:\b\a.ac3 c:\b\a.wav -down2 -normalize -libav
------------------------------------------------------------------------------
AC3, 5.1 channels, 3:53:15, 640kbps, 48kHz
Decoding with libav/ffmpeg...
Remapping channels...
Downmixing multi channel audio to stereo...
Writing WAV...
Creating file "c:\b\a.pass1.wav"...
This track is not clean. <WARNING>
Caution: The WAV file is bigger than 4GB. <WARNING>
Some WAV readers might not be able to handle this file correctly. <WARNING>
Starting 2nd pass...
Reading WAV...
Reducing depth from 64 to 24 bits...
Writing WAV...
Applying 10dB gain...
Creating file "c:\b\a.wav"...
The original audio track has a constant bit depth of 64 bits.
The processed audio track has a constant bit depth of 24 bits.
Caution: The WAV file is bigger than 2GB. <WARNING>
Some WAV readers might not be able to handle this file correctly. <WARNING>
eac3to processing took 29 minutes, 25 seconds.
Done.

Anyway, I still want to know what was the problem with the nero ac3 decoder.

[Guest]

You should ask madshi about it, IMHO.

[tebasuna51]

Please use DelayCut to fix the AC3 file and put here the log like neuron2 say you.

Maybe you can try to rip only the main movie from DVD and use eac3to to extract the ac3 from the VOB.