Audio/video sync probs

[Mark F]

A while back I used DVD-shrink to remove all extras (i.e. movie only, no compression) and DVD-RB to encode the movie (Lord of the Rings - Fellowship of the Ring). I got big video/audio sync problems. I noticed that in a later version of DVD-RB the bug had been fixed, so I ran the compression again using version 0.49, although the sync problem is far less noticable it is still there. It's not bad enough to make the film unwatchable but bad enough to be distracting.

I'm not reporting this as a bug (I used DVDshrink so it serves me right :) ), but was wandering if anyone else had found the same problem with my method or this particular movie.

Because the problem is so slight it's dificult to tell exactly, but it seems to be better at some times than others.

I have done the same method with 'LOTR - The Two Towers' and get the same sync problems. My settings are below.

Encoder : CCE SP [ssg] Ver. 2.67.00.23 (upgrade of trial version)
AviSynth 2.54, eclcce 1.81
DVD-RB v 0.49
Batch processed both movies (i.e. one click mode)
mode -> cce mode, verbose status window, dynamically assign cell bitrates
options -> cce options -> cce sp (v2.66+)
advanced (expert) settings -> VBR_Bias 25, Quality_Prec 16, VBR_Passes 3.
setup -> Path to CCE SP (New) : c:\Program Files\Custom Technology\CCE SP Trial Version\EclCCE.exe, Run encoder minimised, all audio channels removed except english (although only movie AC3 channel remaining after DVDshrink)

If the problem is unfixable is there any software that i can use to correct the problem. I know VirtualDub & Nandub can do things like this for AVI's, how about DVD's

[Joergen]

Most importantly: what is your standalone?

[Mark F]

If tried the movie using PowerDVD and Real One Player on the PC and my Toshiba SD220E MR (standalone) and my XBOX. Same problem on all, so i'm guessing it's the files.

[Joergen]

Probably, although PC software and the Xbox are all software players. I'm not familiar with Toshiba players.

You could try 0.50, perhaps the audio sync is bitrate related (though I doubt it). Since you did a movie only, the bitrates might peak with versions before 0.50 (unless the movie is progressive).

[Mark F]

I'll leave v0.50 running tonight and see how that looks.

[writersblock29]

@Mark F

<If tried the movie using PowerDVD and Real One Player on the PC...>

Have you tried playing your original files on your computer? If the problem exists there, it'll just be copied faithfully by Rebuilder. If the originals mess up, you might profit from using DVD Decrypter to put the movie on your hard drive (since Decrypter patches the m2v file's timecode), then use Shrink to reconstruct your project like you did before. It's an extra step, I know... but if it works, it works! The problem you're describing sounds like the starting points of your video and audio streams aren't in line... and it's usually an error in the initial ripping that's caused it whenever I've faced it.

[Mark F]

Sorry, forgot to add that information. I used DVD Decrypter to rip the movie to hard drive b4 using DVDShrink.
The DVDShrink output (aprox 6Gb) has no sync problems and runs perfectly.

[begu]

Well I have used this method too (rip all files with DVDdecrypter and then transcode the menus using DVD shrink). I haven't watched so accurately the rebuilt movies (using 0.49), and I have not noticed any bigger av sync problems. Maybe I will have to watch again more closely, in fact some times it seems that there is a faint av sync issue, but I thought that it was in the original too. Well I have to check it again.

[begu]

I got an idea:
why not use DVDshrink afterwards? Like this:
- first check with shrink the reduction % for the actual movie with correct settings (audio tracks to keep, menu reduction etc.)
- then use the rebuilder to original and do the process (first step)
- then use RBopt to modify the bitrates for the movie (raise the bitrate to the corresponding reductio % checked in the shrink earlier)
- the output is oversized of course, but the movie is correctly encoded
- then using DVD shrink, transcode the menus (and maybe few %) from the extrac etc. to get it to fit in one DVD

Now, the rebuilder gets full original disc, and the actual movie gets encoded in correct size and the shrink is used afterwards to transcode (or strip) the menus and extras.

MarkF: have You tried the rebuilder ONLY for the LOTR? I mean that the rebuilder gets the original (using dvd decrypter)? Does the output of the RB still get av sync problems?

[Mark F]

Nice idea about using DVDshrink last, I'll have to give that a try when I get the time.

I've lent my origional LOTR out, so can't try a full disc backup until I get it back.

I've read on this site that using DVDshrink to make movie only backups is unsuported because it 'butchers' the source. Is there a way of doing it so that it doesn't. I havn't had the time to try RB-OPT yet. Can that do movie only copies?

[daxab]

I had audio/video sync problems earlier (see other posts) and found that the sync problem on playback occurred with one standalone (a Panasonic) but not another (a Philips). This was with an older (pre 0.50) version.

[writersblock29]

@ Mark F

http://www.ifoedit.com/

You can download the newest IFOedit (version .96) and use it to create a movie-only source... but I'm not aware of its being able to join titles (giving you a one-disk copy of a two-disk movie).

Rebuilder hasn't (so far!) complained about any of my IFOedit treatments, and all resulting disks have been perfectly playable.

So while it really doesn't help you in this case, IFOedit may be what you're looking for for creating movie-only projects that work in Rebuilder, otherwise. Doom9's got IFOedit guides that you can read over, if you want to see what it will let you do BEFORE struggling with the learning curve of teaching yourself to use it.