Converting Xvid 23.976 fps to PAL SVCD - Jerky video problem

[thesicilian]

Hi guys,

When I convert Xvid or Divx files with a 23.976fps to PAL SVCD using tmpgenc I get jerky play back on fast motion scenes. For instance, when the camera is panning left to right. Is it because of the frame rate difference? Or is SVCD always slightly jerky on high motion scenes.

If its because of the frame rate what the best way to change the frame rate?

Please help.

Thanks in advance.

[Baldrick]

try this method
http://www.vcdhelp.com/forum/viewtopic.php?t=138106
should work fine on xvid also.

[thesicilian]

Tried it, but the audio seemed to go out of sync.
Is there another method?

[KingJohn]

Tried it, but the audio seemed to go out of sync.
Is there another method?

Seams too, or it does If your move has bad frames you need to fix them, send me a PM it may need some special work done.

[thesicilian]

It definatly goes out of sync. If I encode the original file the audio stays in sync, but its just slightly jerky. I tried changing the fps & the audio as per guide, but instead of joinging them using vdub I put them directly into TMPGEnc. I found the audio went slightly out of sync agian, but it got worse throughout the film.

[thesicilian]

Is there a way of doing this using adobe premiere?

If there is could someone point me in the direction of a guide?

Thanks in advance.

[KingJohn]

It definatly goes out of sync. If I encode the original file the audio stays in sync, but its just slightly jerky. I tried changing the fps & the audio as per guide, but instead of joinging them using vdub I put them directly into TMPGEnc. I found the audio went slightly out of sync agian, but it got worse throughout the film.

If the audio has been saved to PCM, then it should not gradually get worce, check the guide, you may have missed something

[banjazzer]

It definatly goes out of sync.

If your avi has no bad frames (or you remove them) and the audio and video is in sync to start with and you have uncompressed audio, then altering the framerate and shrinking the audio will yield a result in sync. I've done this dozens of times, and the only time it failed was when I got lazy and didn't check for bad frames.

Before further encoding, check that audio and video are still the same length (to within a fraction of a second). And to re-assure yourself all is well, play in Virtualdub by selecting the altered avi and the altered wav. If so, something is wrong with the subsequent encoding.

By the way, KingJohn's guide is too complicated for me. 8) You could try dealing with the avi as a whole, altering the framerate in Virtualdub, and shrinking the .wav in Soundforge (Time stretch) to 95.9%. Later, cut the mpeg.

[KingJohn]

It definatly goes out of sync.

If your avi has no bad frames (or you remove them) and the audio and video is in sync to start with and you have uncompressed audio, then altering the framerate and shrinking the audio will yield a result in sync. I've done this dozens of times, and the only time it failed was when I got lazy and didn't check for bad frames.

Before further encoding, check that audio and video are still the same length (to within a fraction of a second). And to re-assure yourself all is well, play in Virtualdub by selecting the altered avi and the altered wav. If so, something is wrong with the subsequent encoding.

Have you tried then converting those AVI's to PAL VCD with the new TMPGEnc 2.510 ?

I'm asking this, as a few people are having problems, I have not installed it yet

[thesicilian]

In TMPGEnc the avi's convert perfectly in sync, just slightly jerky on play back on standalone DVD. Is this just a inherent SVCD problem?

[banjazzer]

No, it's not anything to do with SVCD - nor anything to do with correct NTSC(film) to PAL conversion.

[rhegedus]

I get the feeling that sometimes things are not meant to be.

As I've mentioned in a previous post, I've tried to convert About A Boy avi 23.97 fps to 25 fps.

Used virtual dub to check for errors, then got a wav file, then changed frame rate to 25 with direct stream copy. Got the length of the new 25 fps avi exactly and converted the original wav to this length exactly using Gold wave.

I now have an avi and a wav file of exactly the same lengths.

Opened the 25fps avi with virtual dub and opened the new wav, then re-encoded with virtual dub.

Result? Gradually more out of sync as the avi plays.

I cannot find a logical reason for this. Some things are just not ment to be.....

Regards,

Rob

[banjazzer]

Did you check the original?

Did you check the altered avi and wav by playing both together with Virtualdub?

If the answer is yes to both, then you truly have uncovered a mystery, because without uncorrected errors in the avi, or too many corrected errors in the avi, I have never experienced this problem.

[KingJohn]

Used virtual dub to check for errors, then got a wav file, then changed frame rate to 25 with direct stream copy. Got the length of the new 25 fps avi exactly and converted the original wav to this length exactly using Gold wave.

Did you check it with Vdub MP3 ?

Did the original sound have 48Khz, did you leave it like that ? or change it to 44Khz ?

by the way, TMPGEnc 2.510 does cause frame rate errors

[thesicilian]

Does anyone know how to do the above using Adobe premire?