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. The "-x" option of sox only swaps bytes if nessasary. I started my first test with just cutting of the wav header with dd. The resulting NAME.lpcm was the same. It is also the same if I don't use the "-x" option.
Yesterday I started to look closer on the NAME.mpg. I wrote a script that prints out the bytes after "00 00 01 BD" in hex. How many bytes after "00 00 01 BD" are important? Is the information on http://dvd.sourceforge.net/dvdinfo/lpcm.html correct? To make more test I need a fast command line hexeditor to change hex bytes. (p.e. from 0a0a0a to 020202) Does anybody know a fast one? I will post my results soon. Am I the only one with this problem? > What exactly is the noise you are hearing? Is it constant noise, or > does it fade in and out? It's sounds exactly the same as if you burn a audio cd with swapped bytes. I can put a sample of it on a webserver if this helps. Greatings Oliver ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
