Syncing Issues

[qshartle]

Well I gave up on DivX so i went back to SVCD. I am trying to rip a 24 min. long Cowboy Bebop episode. I have encoded the movie 4 times at 4 different framerates. 23.976, 29.97, 25, and the new one on mediapipe natural film. None of them match the audio and video length.
please help me.

Qshartle

[squeed]

No solution is available other than QT Mutilator which works "sort of". When ffMPEG 0.0.4b comes out there may be a solution.

Welcome to the club. I have been trying to make an insync SVCD since November 2001.

-S

[qshartle]

Thanx

Should i just change the *.mpv to*.mov to trick OS X?
then add in my aduio and qt mutate it?

Qshartle

[DRfrankenpimp]

you need to extract the audio as a wav file load into a sound program such as sound forge and use the time warp function to give the wav file the same length as the video file.if your source is a avi load into virtual dub and select change frame rate so audio and video match,it may change the frame rate say from 29.970 to 29.966 but when you load into tmpgenc the audio should stay in sync after that,works for me every time.also you can get sync problems if the audio of the avi is compressed.

[Macnewbie]

you need to extract the audio as a wav file load into a sound program such as sound forge and use the time warp function to give the wav file the same length as the video file.if your source is a avi load into virtual dub and select change frame rate so audio and video match,it may change the frame rate say from 29.970 to 29.966 but when you load into tmpgenc the audio should stay in sync after that,works for me every time.also you can get sync problems if the audio of the avi is compressed.

Since he posted this in the mac forum, VirtualDub (a PC app) won't help him.

[DRfrankenpimp]

oops,i did not realize that

[bilestyle]

*note: you NEED the mpeg-2 decoder and encoder component for quicktime for this process to fully work.

i admit, this process is pretty longwinded if you arent just downsampling the source of the video for use dvd->dvd, but has worked flawlessy for me each time i have done it so it is a solution that works... First rip your vob file from the DVD with OSeX, after this demux JUST the ac3 file out of the VOB using extractor (http://denisx.dyndns.org/extractor/) and then convert the ac3 to aiff using bd4go ( http://denisx.dyndns.org/bd4go/)


1. open the vob in quicktime
2. open the aiff in quicktime and select it all and copy it
3. add (NOT add scaled) the aiff to the vob file
4.export to quicktime movie format using either DV or MJPEG-A compression at whichever settings you desire. make CERTAIN to leave the framerate space blank because it is very likely that the framerate jumps around throughout the episode/movie. also be sure to select options and make sure the audio box is checked at the settings are to your liking, the default audio compression is usually pretty crappy so u should need to change it.
5. wait... depending on the speed of your computer this process can be VERY longwinded... for me it decodes faster than realtime (on a DP 800 G4)
6. open the video in quicktime and export to mpeg-2 according to whichever settings you desire (note: there MAY be a better way to encode this mov file to mpeg-2 without having to use the componet, but so far its the only thing i have found to properly change the framerate to 29.97 and keep the vid/aud in PERFECT sync)
7. wait.. this process is longer than the decoding and takes me about an hour or so for 20 minutes of source video.
8. after that i assume you want to convert the video to SVCD compliant mpeg-2, so use mediapipe with the following pipelines


1. file browser (Select your m2v file)
2. file streamer
3. mpeg decoder
4. scaler 480x480
5. color conversion
6. mpeg encoder

mpeg2enc arguments: -v 0 -f 4 -F 4 -n n -a 2 -b 2500 -I 1 -r 16 -M 2
ppmtoy4m arguments: -v 0 -S 420_mpeg2 -L -I t -F 120000:4004 -A 4:3

*NOTE: the –M 2 argument for mpeg2enc is ONLY if you have dual processors. (if you don’t know whether or not you do, then you don’t and leave the argument out)


9. press start and wait… this process takes about 2 or so hours with a source video of 22 minutes on my G4 DP 800.



10. re-encode ac3 or aiff to mp2 using mediapipe

(ac3)

file browser (Select your ac3 file)
file streamer
ac3 decoder
mp2 encoder

(aiff)
file browser (select you aiff file)
Quicktime audio decoder
mp2 encoder

11. remux the resulting streams with missingmpegtools.

i know this process is long and ardous, but in the end it SHOULD always yield a svcd stream that is in sync with the audio in practically lossless quality.

im doing some tests on this process that totally skips the m2v process in quicktime for those who want SVCD and not DVD video, hopefully my tests go through alright and ill post an addendum to this post, or a revised version of it.

[qshartle]

K
I will try that.

Qshartle

[bilestyle]

Okay here is the revision, the m2v step in quicktime is TOTALLY unessesary, I skipped the step and went straight to mpeg-2 from the DV file.... i edited a few things on this version, cut out that one step and i've tested it several times and its worked like a charm each time

---
*note: you for the following process you NEED the mpeg-2 decoder component for quicktime.

I admit, this process is pretty lengthy, but has worked flawlessly for me each time I have done it so it is a solution that works...

First rip your VOB file from the DVD with OSeX, after this demux JUST the ac3 file out of the VOB using extractor (http://denisx.dyndns.org/extractor/) and then convert the ac3 to aiff using bd4go ( http://denisx.dyndns.org/bd4go/)


1. open the VOB in QuickTime
2. open the aiff in quicktime and select it all and copy it
3. add (NOT add scaled) the aiff to the vob file
4.export to DV Stream
5. wait... depending on the speed of your computer this process can be VERY longwinded... for me it decodes faster than realtime (on a DP 800 G4) - you need ALOT of space for this step (upwards 20-30 gigs sometimes )
6. after that i assume you want to convert the video to SVCD compliant mpeg-2, use mediapipe 0.8.9 with the following pipelines

1. file browser (Select your .dv file)
3. quicktime decoder
4. scaler 480x480
5. mpeg encoder


ppmtoy4m arguments: -v 0 -S 420_mpeg2 -L -I t -F 600:20 -A 4:3
mpeg2enc arguments: -v 0 -f 4 -F 4 -n n -a 2 -b 2500 -I 1 -r 16 -M 2

NOTE: the –M 2 argument for mpeg2enc is ONLY if you have dual processors, leave it out if you don’t.

NOTE2: These settings are for NTSC only, you PAL bastards dont have it hard like us, so if you cant figure it out, tough!!!!

6. press start and wait, this process takes about 1.5-2 hours for 22 mins of video on my DP 800 G4


7. re-encode ac3 or aiff to mp2 using mediapipe

(ac3)
file browser (Select your ac3 file)
File streamer
ac3 decoder
mp2 encoder

(aiff)
file browser (select you aiff file)
Quicktime audio decoder
mp2 encoder

8. remux the resulting streams with missingmpegtools.

i know this process is long and ardous, but in the end it SHOULD always yield a svcd video stream that is in sync with the audio in practically lossless quality.

--
that is my revised version, its the quickest method i have personally found,
the one big downside which we constantly face is that u need damn near need a hard drive solely dedicated for converting video since SO much space is necessary to decode to DV, there are no quality settings so you are pretty much stuck with what quicktime gives you, and you cant do DVCPRO - NTSC compression in quicktime because it doesnt yield the same output, you would need to still do the dv->m2v step in quicktime for that method to work, so this method needs alot of space but effectively cuts out one time wasting step.

addendum:

NOTE: sometimes it appears quicktime will only open 1 minute or so of your VOB file, if that happens on a regular basis then you will need to change the osex step to rip into elementary streams and then remux them as a DVD in missingmpegtools and then start from there...

[Benoit36]

Should I follow most of these steps for DVD to DVD-r?

[bilestyle]

Here is the process you would use to downsample DVD instead of DVD->SVCD


*note: you NEED the mpeg-2 decoder and encoder component for quicktime for this process to fully work.



1. rip your vob file from the DVD with OSeX
2. demux JUST the ac3 file out of the VOB using extractor (http://denisx.dyndns.org/extractor/)
3. and then convert the ac3 to aiff using bd4go ( http://denisx.dyndns.org/bd4go/)

NOTE: sometimes it appears quicktime will only open 1 minute or so of your VOB file, if that happens on a regular basis then you will need to change the osex step to rip into elementary streams and then remux them as a DVD in missingmpegtools and then start from there...

4. open the vob in quicktime
5. open the aiff in quicktime and select it all and copy it
6. add (NOT add scaled) the aiff to the vob file
7. export to DV stream
8. wait... depending on the speed of your computer this process can be VERY longwinded... for me it decodes faster than realtime (on a DP 800 G4)
6. open the video in quicktime and export to mpeg-2 according to whichever settings you desire
7. wait.. this process is longer than the decoding and takes me about an hour or so for 20 minutes of source video.
8. drop your new m2v and original ac3 file as assets into DVD Studio pro.
(Im going to assume you know how to use DVD studio pro, so obviously after you drop in the assets you need to do some additional steps which i dont feel like outlining here)
9. build your disc from the file menu
10. make a new dvd in toast
11. drop in the video_TS folder and burn

[Benoit36]

Thank You, I will try that. When I rip with Osex should I select prog stream instead of elem stream? And I believe Osex creates a VOB and an Ac3 file. Do I disregard the Ac3 file that osex just made and demux thde vob through extractor? Oh, I have encountered the 1st minute thing with quicktime a few times.

Thanks for the help

[bilestyle]

if you select prog streams it will ONLY give you a vob, if you select elem. streams you will get a ac3 and m2v, so even though its a slightly longer process it may be more effective to rip to elem. streams and then just remux in mmt. its kind of a pain to remux a file that big and takes some time... but for some reason vob files dont come out right all the time...

[Benoit36]

Ok, so i select elem stream and demux the VOB file through mmt. Cool. Lets say this works, is it possible to run it through iDVD instead of toast? I would like to put together a quick menu and dress it up a little.

[bilestyle]

you really have no advantage by using IDVD it doesnt accept mpeg-1 or 2 files so you would have to have a huge file for idvd to accept it and you would lose alot of the time that u want for it that u could have using dvd studio pro, you can make MUCH nicer menus in flash and photoshop for dvd studio pro than crappy idvd. and your mixing up the steps. when u rip it as elementary streams in osex it gives u the demuxed streams. missingmpegtools is where u remux (join) the streams into a single mpeg-2 file. THAT is the file u add the audio to as aiff in quicktime and then export to a DV stream.

[Benoit36]

Well, I tried everything I could last night and nothing worked. I tried ripping the movie with Osex using elem streams and converting the ac3 to aiff and then proceeding to QT6 for pasting of the audio to video and using add & add scale function still produced an out of sync movie, and the audio & the video were the same length. I then tried to rip the movie using Osex selecting prog stream which produced 1 big VOB file. The next step was to demux the VOB in extractor to produce and ac3 file. I then proceeded to MMT to remux (join) the vob & ac3 files. This produced a qt file (.mov) that was about 120mb. Needless to say this did not work! I am now using bbdemux to extract the audio from the vob right now maybe this will yield a usable audio file that syncs with the video.

[bilestyle]

you've got it all wrong, you rip to elementary streams and then remux the audio and video and THEN you add (NEVER ADD SCALED) the aiff in qt.. if you do this step properly you will get them in sync

[Benoit36]

im sorry if im not conveying the info properly but, I did rip to es streams and tried to remux them in mmt, but it produced a 120mb qt file. This file is about 1 min from the movie. What am i missing?? I cant get to the QT steps using this method. I tried it the other way just for kicks. How can i be doing it all wrong if mmt gives me 120mb file to work with???????

[bilestyle]

you are probably only ripping one chapter or something like that... are you making sure to rip in title mode, or that you have all your chapters selected? your not trying to join an vob and ac3 file are you? a m2v and ac3 right? download my pdf file, maybe that will help.

homepage.mac.com/comfortableliar

[Benoit36]

Yes, im in title mode all chaps are selected and if you select elem stream you get a an m2v ac3 output. It looks like the latest ver of Osex, and by the way there is a quicktime choice along with title, chapter, etc. Maybe I'll try a different movie.

Thanks for your help, I'll take a look at your pdf and double-check my procedures.

[Benoit36]

I got the mmt re-mux to work!! It was my fault, I didnt let the program run its course. As it turns out I was shutting the program down before it was done, thus creating a small file. After the mmt was finished I then added the aiff to the video and had perfect sync!!!!! However, when I save to DV stream quicktime crashes when it nears the end of the save. I tried to save it twice, and twice it crashed. It did create a big file 3.4gb and when I double-clicked it the movie did play in Quicktime but there was no sound. Is this normal??

[bilestyle]

im surprised the file even played.. usually quicktime has to run its full course... and yes i cant believe u were not letting mmt run its course!!! of course you wont get a file in sync heh... well im not quite certain why quicktime would crash eaCh time... do you have enough space to accomodate it? if itS a tv show ep itll probably take up about 4.5 gigs or so.. if its a full movie it could take up 20-30 gigs....

[Benoit36]

It's a movie and the file is 19gb or so. I have 5 gb or so to spare. Do I need more? If so I can make room. One more question, I think I turned the virtual memory off when I installed FCP 1.0 for OS 9. Is this a problem?

[Benoit36]

Got it!!! Everything works, I'm very pleased with the results.

Thanks bile

[bilestyle]

no problem i aim to please.. there is a MUCH better method available now and im working on making a new tutorial for it.. doesnt require the space hungry m2v->DV step... and still gets perfeCt sync everytime.. in between doing work today ill try and piece it all together for a good tutorial, hopefully my lazy ass will stop bein lazy and put together a video conversion webpage that i've been planning on.