[MPlayer-users] problems with NTSC

[Dominik Szczerba]

Thanks so much for detailed feedback, it was very helpfull.
I will try without -noskip this night.

Meanwhile 2 questions:

1)  23.976, 29.97 or 25: what do I choose? MPlayer says my vobs are 
29.97... How do I know about NTSC dvds? With European dvds I always used 
25...

2) why do you use lavc and not divx4 501?

thanks!
DS

Green, Shaun wrote:

>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>
>I use mencoder and have never have had good a-v sync when using the -noskip
>option. It only works for me when I don't use this option, but I do use the
>-ofps 23.976 option to get the original film. So here's the very basic 3
>step commands I've been using now for several months;
>
>1) Rip it to the HD
>
>mplayer -dvd 1 -nortc -dumpstream
>
>
>
>2) Rip the subtitles to vobsub format
>
>mencoder -v -vobsubout The_Adventures_Of_Sherlock_Holmes_1 -oac copy -aid
>128 -ovc copy -o /dev/null -ofps 23.976 -vobsuboutindex 0 -sid 0
>./stream.dump
>
>
>3) Encode the video to LAVC (mpeg4), audio AC3 to AC3 (copy)
>
>mencoder -v -o The_Adventures_Of_Sherlock_Holmes_1-200_14_1100ni.avi -oac
>copy -aid 128 -ovc lavc -lavcopts
>vcodec=mpeg4:vbitrate=1100:vhq:vqmin=1:vqmax=4:keyint=500 -ofps 23.976 -ni
>-vop pp=0,crop=636:480:2:0,scale=640:480 -sws 2 ./stream.dump
>
>
>
>This process always creates a file with -200ms uniform desync throughout,
>which you have to correct with AVIdemux afterwards (using 200 however in the
>time offset menu because it's opposite).
>
>Shaun
>                                
>
>-----Original Message-----
>From: Dominik Szczerba [mailto:domi at vision.ee.ethz.ch] 
>Sent: Thursday, October 31, 2002 3:04 PM
>To: mplayer-users at mplayerhq.hu
>
>
>
>Subject: [MPlayer-users] problems with NTSC
>
>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>Hi,
>
>I ma considering switching from Transcode to MPlayer (MEncoder, to be 
>strict). I am trying to mencode NTSC vobs:
>
>cat *.vob | nice -n 19 mencoder -oac mp3lame -lameopts cbr:br=128:q=2 
>-ovc frameno -o frameno.avi -noskip -ofps 25 -
>cat *.vob | nice -n 19 mencoder -oac copy -ovc divx4 -divx4opts br=1600 
>-vop scale=640:360,crop=698:476:12:2 -sws 2 -noskip -ofps 25 -pass 1 -o 
>movie.avi -
>cat *.vob | nice -n 19 mencoder -oac copy -ovc divx4 -divx4opts br=1600 
>-vop scale=640:360,crop=698:476:12:2 -sws 2 -noskip -ofps 25 -pass 2 -o 
>movie.avi -
>
>I am having the following problems:
>1) video file is not in agreement with what I calculate (it's much smaller)
>2) audio is not synchronized.
>
>'Mplayer -v' says my vobs are 29.something fps. I tried without -ofps 
>option as well. I didnt try without -noskip yet, but I believe that 
>leaving out some frames results in slightly shaky video. Or am I wrong?
>My version is MPlayer 0.90pre6-2.95.3. I havent found in CHANGELOG 
>anything that seemed a good reason for an update. Or am I wrong?
>
>Transcode has the same problems, no matter what options I choose.
>
>I would do more debugging but MPlayer lacks a very usefull option 
>-startpos, counterpart of -endpos, which makes it impossible to test 
>critical parts of DVD.
>
>I tried browsing mail archives, but my modem connection is too slow to 
>browse thru everything, and what I found was not conclusioned.
>
>would you please advice?
>thanks
>--d;
>  
>