On Wed, 29 Jun 2005, Dave Chapman wrote: > [EMAIL PROTECTED] wrote: > > >On Wed, 29 Jun 2005, Dave Chapman wrote: > > > > > > > >>[EMAIL PROTECTED] wrote: > >> > >> > >>>Hallo, > >>> > >>>I think there has to be a bug in the mplex tool with lpcm. That is what > >>>I have > >>>done: > >>> > >>>1. sox NAME.wav -t raw -x -s -w -c2 -r48000 NAME.lpcm > >>>2. mplex -S 0 -f 8 -V -o NAME.mpg NAME.lpcm NAME.m2v > >>> It make no different if I also use "-L 48000:2:16" > >>>3. Try to play this file with mplayer and xine. Video is OK, but Sound > >>> make just a noise. > >>> > >>> > >>If you compare the bytes in NAME.wav and NAME.lpcm, are they > >>byte-swapped? (They should be). If not, then you should remove the -x > >>option to sox. > >> > >> > >No the bytes are not swapped. The "-x" option swaps the bytes only if it > >is nessasary. So you get the same NAME.lpcm file without the "-x". I > >started my test with just cutting of the wav header with dd and the > >NAME.lpcm was even then the same. > > > > > That's the cause of your problem. WAV data is always little-endian, and > LPCM files for DVDs must be big-endian. > > If you can't get sox to do that conversion, then you may like to try the > "wav2lpcm" program which does this conversion (and the necessary byte > re-packing for 24-bit audio). It's only available via CVS (as part of > my dvd-audio project at Sourceforge). You can browse it here: > > http://cvs.sourceforge.net/viewcvs.py/dvd-audio/tools/ Ok I will try it. Thanks for your help. I tried also another program to convert from wave to pcm and this one also do NOT swap the bytes. Is the byte swapping only nessary for "lpcm"?
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