Re: [dvd::rip] troubleshooting audio sync problems

Yes, do try 0 and 3 (all the options apply to all video sources, though
2 and 4 are more beneficial for NTSC streams), and they do go in the
transcode options box. I have had luck with those.

On Sat, 2004-11-13 at 10:56 -0800, synaptical wrote:
> i tried -M 4 once because it seemed like "turbo" -M2. i don't think i saw 
> much difference, but maybe i need to try -M 2 (just so i'm sure, it goes in 
> the transcode options on the Transcode tab, correct?). and i never considered 
> option 3 because the other two specifically mentioned NTSC, but maybe i 
> should not have assumed that? i.e., can i use -M 3 on NTSC dvds? 
> 
> in the meantime i'll try it again with -M 2 and see what happens. it could 
> take a few hours. :p
> 
> thx 
> 
> --- Mark Rose <shifted@xxxxxxxxxx> wrote:
> 
> From: Mark Rose <shifted@xxxxxxxxxx>
> Date: Sat, 13 Nov 2004 11:15:44 -0700
> To: dvdrip-users@xxxxxxxxx
> Subject: Re: [dvd::rip] troubleshooting audio sync problems
> 
> Two things to be sure to try:
> 
> Have you tried *all* the settings for transcode's -M flag? This has
> fixed every audio sync issue i have ever encountered. From transcode's
> man page:
> 
> The  demuxer  takes care that the right video frames go together
> with the right audio frame. This can sometimes be a complex task
> and transcode tries to aid you as much as possible.
> WARNING: It does make a difference if you (the user) specifies a
> demuxer to use or if transcode resp. tcprobe(1) chooses the  one
> which it thinks is right for your material.
> This  is  done on purpose to avoid mystic side-effects. So think
> twice, wether you specify a demuxer or let transcode choose  one
> or you might end up with an off-sync result.
> 
> 0   Pass-through.   Do  not mess with the stream, switch off any
>     synchronization/demuxing process.
> 
> 1   PTS only (default) Synchronize video and audio by inspecting
>     PTS/DTS  time  stamps of audio and video. Preferred mode for
>     PAL VOB streams and DVDs.
> 
> 2   NTSC VOB stream synchronization feature.  This  mode  gener-
>     ates  synchronization information for transcode by analyzing
>     the frame display time.
> 
> 3   (like  -M 1):  sync  AV  at  initial   PTS,   but   invokes
>     "-D/--av_fine_ms"  options internally based on "tcprobe" PTS
>     analysis. PTS stands for Presentation Time Stamp.
> 
> 4   (like -M 2): initial PTS / enforce frame  rate,  with  addi-
>     tional frame rate enforcement (for NTSC).
> 
> 
> 
> Also, avoid using divx -- use xvid instead. Divx is quite buggy (it's
> binary only), whereas xvid is open source and also produces better
> quality output.
> 
> Definitely try all the settings for the -M flag though.
> 
> Mark
> 
> On Sat, 2004-11-13 at 08:12 -0800, synaptical wrote:
> > almost every DVD i backup with dvd::rip comes out with massive audio sync 
> > problems.  i've read the documentation, tried almost every setting, used 
> > PSU core, etc. but nothing seems to fix it. some titles don't use PSU, and 
> > they still come out un-synced. some dvds encode fine without the sync 
> > problem, and i can't see what's different about them to cause the 
> > difference. 
> > 
> > i'm not sure what info to supply that might be relevant. i'm using dvd::rip 
> > over the network with ssh, if that matters. processor is a non-overclocked 
> > xp 1600+ until my P4 gets here next week. OS is arch linux, and i will 
> > probably switch to slackware when i upgrade the motherboard/processor in 
> > case it has something to do with the arch binaries. if that were the case, 
> > though, i wouldn't think some dvds would come out synced. 
> > 
> > dvd::rip seems like a really nice tool, great ease of use, very well laid 
> > out gui, inuitive, etc. and i'd hate to have to ditch it. but if i can't 
> > backup my dvds, it's useless to me. i'll have to learn mencoder/acidrip, 
> > etc. for one last try before it goes, can anyone assist me or possibly walk 
> > me through backing up a dvd with dvd::rip to make sure i am not just 
> > overlooking something really dumb? 
> > 
> > appreciate
> > 
> > _____________________________________________________________
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> > 
> -- 
> Mark Rose <shifted@xxxxxxxxxx>
> 
> ____________________________________________________
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> 
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> 
-- 
Mark Rose <shifted@xxxxxxxxxx>

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