Sync Problems GALORE!

[Bravoxena]

I have some divx video files that I got off p2p (obviously crappy). I scanned the video stream for errors, and no errors . But when I try encoding to SVCD, the files get out of sync. I am encoding to the same frame rate as my files (usually 23.975 or whatever that decimal is)

[Treebeard]

what format is the audio in? mp3, ac3?

[Bravoxena]

it's in mp3

[narked]

OK, Maybe the problem is:
SVCD is 29.97fps for NTSC film and NTSC, but NTSC film for vcd is 23.976fps where NTSC for vcd is 29.97fps. A lot of movies on net are 23.976 so when converting to everything but NTSC vcd your doing a framerate conversion....(even more confusingly I use PAL 25fps).

TMPGenc is not brilliant at sorting out the sound syncing when converting framerates so you may consider saving out the wave sound with virtualdub and interleaving it again with the avi before conversion.
Virtualdub - audio - full processing mode. File - save wave. Then audio - wave audio, load wave sound. Then file - save as avi. New avi has wave sound interleaved with avi. Check sound sync and send to TMPGenc (or miss saving interleaved and frameserve if your up to it).

Virtualdub 1.5.1 is slow at converting wave sounds so you might need to backdate to aversion such as 1.4.13

[ZippyP.]

narked, Do you really need to interleave the wav back into the Avi? Can't you just use the wav file as the audio source for TMPGenc? Just an idea.

Use Vdub-MP3 if you get the VBR warning.

Also, for sound quality reasons, you should install an external sound encoder like Toolame. It's in the Tools section along with how to install instructions.

8)

[Bravoxena]

Did you want me to save as an UMCOMPRESSED avi? (i dont have 100bg free space)

How do I "install" tooLame?

[ZippyP.]

Both Audio and Video Direct Stream Copy to save the Avi.

D/L Toolame and unzip to a folder. Within TMPGEnc, as follows:

"tooLAME is an optimized MPEG-1/2 Layer II audio encoder and You can easily use it with TMPGEnc just goto Options->Environmental Settings >External tool and change Layer2 to tooLame."

Hope that works! 8)

[narked]

Zippy P, not sure about having to interleave sound with avi but have been doing it as standard for 12months now since nightmare period of learning to convert (especially since I always go to PAL format).

Bravoxena, no!!! video direct stream copy (sorry!!)......

[Bravoxena]

well i assumed it should be direct stream so i did that. the file's in sync when i saw it, i hope it's like that when i encode.

[Bravoxena]

UGH! It's still out of sync!!!
Damn crappy p2p divx's. Any other suggestions? Maybe I'm forgetting really simple steps?

My source framerate is 23.975 (or whatever that decimal is) and I convert it to a NTSC film svcd with inverse telecine. Am I doing anything wrong??? I just don't get it! I don't think this file's audio has a VBR (because I got no warning in VDub). Hmm....

[Mr Grumpy]

My source framerate is 23.975 (or whatever that decimal is)

This may be the problem - I once got a film that was 23.978fps and took me a while to get sorted out.

I *think* I saved the audio out to a wav using vdub. Then I noted the video length at 23.978fps, before changing the frame rate to 23.976. Then I noted the video length and used Goldwave to shorten the Audio accordingly. Then I used the shortened WAV as the audi input in VDUb and checked the sync. After many attempts of adjusting the length of the audio, I did finally get it in sync and used the result to frameserve to CCE.

[Bravoxena]

This is really confusing and I know I'm gonna encounter these files all the time. What should I do with my divx file so that it doesn't become out of sync when I encode it? The file plays fine before being encoded.

[Gazorgan]

My source framerate is 23.975 (or whatever that decimal is) and I convert it to a NTSC film svcd with inverse telecine

Why? If it's 23.976, then leave it 23.976!! That's perfectly fine for SVCD (non PAL, but it's a standard conversion framerate for FILM2PAL). If you are converting it to 29.97, then that's probably what's causing the error?

And what framerate is it really? A lot of P2P movies are crap, and I've seen some 29.00, 24.00 and 30.00 fps movies (plays fine as a DivX, but just try and convert them).

Are we talking slightly out of sync, gradually out of sync, or fixed out of sync?

[Bravoxena]

the actual fps is 23.976. it gradually gets out of sync.

[Laddydaddy]

Im not sure if this is your problem but you don't need to use inverse telecine in TPMG. Inverse telecine converts a 29.97 frame rate to a 23.97 frame rate. Since your film is already 23.97 fps, simply use the svcd film template. Also you say the film is in sync when you play it. Are you playing it in windows mediaplayer or are you playing it in Virtual Dub?

[Bravoxena]

when it play it (the original file) in ANYTHING the file will be in sync. im gonna try not using inverse telecine tonight but any other suggestions are needed. Thank you all!

[Bravoxena]

Still out of sync!!!

[Laddydaddy]

If you are still having galores of sync problems check out my post at this thread.https://www.videohelp.com/forum/viewtopic.php?t=151110. It is rather lengthy but maybe it will help. If you can pinpoint where the audio and video go astray you may still be able to fix it. Also you say that the film is in sync no matter what you play it in. Have you watched the whole movie to make sure it stays in sync for the entire film?

[ZippyP.]

If it is gradually going out of sync, then you can use "Time Warp" within Goldwave to get the audio and video durations to match. You can check the video duration in Vdub then load the wav file into Goldwave to alter it. If they are out of sync from the start, then Goldwave can insert silence or clip a portion off the start as required. As well, TMPGEnc has an audio delay function at the Source Range screen. Positive numbers start the audio sooner and negative numbers delay it.

It's a real pain but once you've done it a few times it gets easier. Good Luck! 8)

[Bravoxena]

Also you say that the film is in sync no matter what you play it in. Have you watched the whole movie to make sure it stays in sync for the entire film?

The file play's perfectly in sync BEFORE it is encoded. The encoded version is f***ed up.

[Laddydaddy]

The only other suggestion I can make is to strip the audio to a wav file via virtual dub, and strip the avi file to a new compressed avi file without an audio file associated with it. Convert the wav file to an mp2 file in goldwave, and convert the video file to an m1v file in TMPG. Use bbmpg to mux the two together. bbmpg is very good at keeping videos in sync. If your are positive the file plays from start to finish in perfect sync before it is encoded, this should may work.

[Bravoxena]

So I should direct stream the audio, but recompress the video with virtualdub?

[Laddydaddy]

No. Strip the audio file the way you normally would to get a wav file. Then click on audio and choose "no audio." Select direct stream copy under video and then save the avi file. You will now get an avi video file that is the same as your original video except that it will have no audio file associated with it. If this doesn't work I'm fresh out of ideas. Good luck.

[Bravoxena]

when you say "strip" the audio, do you mean "direct stream copy" the audio and save as wav?

[Laddydaddy]

No. Use the full processing mode to get the wav file. This will convert the audio file to a wav file. By using select stream copy for the video and choosing no audio at the same time, you get an exact copy of the video without the audio.

[Bravoxena]

Okay. I see. Now I'm in goldwave, but I can't convert to mp2. i only see mp3.

???

(Thank you so much for your assistance!)

[Laddydaddy]

You're right, goldwave will not do the trick. I was in a rush and typed in the wrong program. It is BeSweet that will convert your audio to mp2. I apologize for the error. I'll have to proof read my posts the next time.

[narked]

UGH! It's still out of sync!!!
Damn crappy p2p divx's. Any other suggestions? Maybe I'm forgetting really simple steps?

My source framerate is 23.975 (or whatever that decimal is) and I convert it to a NTSC film svcd with inverse telecine. Am I doing anything wrong??? I just don't get it! I don't think this file's audio has a VBR (because I got no warning in VDub). Hmm....

NTSC Film SVCD is 29.97fps, YOU ARE DOING A FRAMERATE CONVERSION, and a very large one at that. Try NTSC Film VCD which does not need a framerate conversion (23.976fps). Otherwise you will get a very choppy film (adding 6 duplicate frames a second) Or if you do it with a prog that doesnt add frames you will speed the movie up quite considerably and it will look... well silly really.....

But it can be done. Open movie in virtualdub, save out wave. Go to audio - no audio, then video direct stream copy. Then video - framerate, change to 29.97fps. Save as avi.
Now get Wavworks (on this site) and use stretch compression to change wave from 23.976 to 29.97 fps.
Open new avi in virtualdub. Go to audio - wave audio and open new wave. Preview this and you will probably not go any further (speeded up lots, voices high pitched)..... The framerate conversion you are trying to do is too large. Stick with NTSC Film VCD for movies of this framerate (but you could go to PAL SVCD, but it's European Format - 25fps)

[Laddydaddy]

The NTSC film frame rate is 23.97fps not 29.97fps. He is not doing a frame rate conversion.

[Bravoxena]

I now seem to have trouble transcoding my wav to mp2. It "trancodes" for 3 seconds and closes.

??? hmm ???

i just dont get this!

:'-(