Hi again. I already wrote about my audio sync problems when converting a digital television mpeg2 stream to a svcd.
I use mplayer to play the video and encode it then with mpeg2enc. After that I extract the audio (also with mplayer), encode it. After that the result is always out of sync. I was pointed to that sox tool with which I can correct that delay. It gets on the nerve sometimes but works. But now things are getting serious. Two days ago I recorded "Monty Python Life at the Hollywood Bowl" and two people eagerly awayt my SVCD. So I went through my routine: encoding video, encoding audio, correcting audio speed, encode audio again, mux. The problem: The audio delay is not constant. I synced it at the beginning and the end but the *middle* of the film is almost a second off. Needless to say that if I correct the middle the end will be off. This is why I ask myself again how this audio problem is created to begin with. After all, when I play the original video stream there is no sync problem. Why does it go out of sync when I encode it? How can it go out of sync? Can I somehow force synchronicity? (sp?) Here my procedure: Video encoding: Console 1: mknod stream.yuv p mplayer -vo yuv4mpeg -nosound -noframedrop -noaspect -sws 2 -benchmark -vop expand=480:576:16:16,scale=448:544,pp=0x20000 monty.mpg Console 2: cat stream.yuv | nice mpeg2enc -f 4 -I 0 -V 230 -b 2500 -n p -F 3 -a 2 -q 12 -g 6 -G 18 -Q 0.0 -B 130 -S 790 -o svcd.m2v Audio encoding: Console 1: mknod rec.wav p mplayer -vc null -vo null -ao pcm -hardframedrop monty.mpg cat rec.wav | nice mp2enc -b 128 -r 44100 -o svcd_audio.m2a Console 2: sox audiodump.wav rec.wav speed 0.99978 ------------------------------------------------------- This SF.net email is sponsored by:Crypto Challenge is now open! Get cracking and register here for some mind boggling fun and the chance of winning an Apple iPod: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
