29,970 fps avi to 25 fps MPEG2 - How?

[greig2000_uk]

I have been trying to convert my avi for burning to DVD which is:
Video - DivX3 fast motion Audio - mpeglayer3 (mp3)
aspect - 680x344(1.977:1) Bitrate - 112kb/s CBR
Bitrate - 711kb/s sample rate - 44Khz
FPS - 29.970
Whatever I do I cant get the audio and video in sync!
Iv tried extracting the audio with virtual dub (saved as mp3) and running it through besweet (output to 48khz wav) with no joy.
also tried using avifrate to change fps to 25 and using V/D and besweet as above, this adds 29 mins to the film length and it plays to slow!
Also various other methods with the mentioned software with no joy.
I want to use V/D as a frameserver to TMP as TMP is crap at framesering so if anyone can give me some details on how to convert this kind of file using this method or even if you know a better method it would be very much appreciated.
cheers.

[digitize]

hmmm, well if the audio & video aren't in sync, you may just have to shift the audio. But trying to convert a ntsc vid, to 25 fps (progessive pal) isn't going to work. Also, you most likely want to do a ivtc, as you said the file plays at 29 fps (29.97 = interlaced ntsc i believe). I use avisynth decomb to ivtc, it's pretty simple. But that's about it, not sure if there is too much else you can really do than shift.

[digitize]

btw, aspect is the aspect ratio (i.e. 4:3 = full screen, 16:9 wide screen), the resolution is 680x344.

[greig2000_uk]

Shifting the audio is simple enough but when shifted and in sync the film plays slow(an extra 19 mins of film). NTSC (23.976) to Pal (25.0)converts fine (maybe only a couple of mins film difference)but 29 fps is a puzzle, I need something that is going to let me convert in real time: i.e - keep the film length as is but reconvert the fps, the way I understand it is if there is a way to do this the software must have to drop frames as it encodes ending in a choppy playing video file but length the same (hope that makes sense) and the same goes for audio. And of course, I could be way off mark, maybe there is some software that will let me do this that I just havent found out about yet? Either way it would be nice to find out, I have encoded my file to 29 fps with Vdub frameserving to TMP, and it is fine in WinDVD, but I dont know if I can Author it and burn it in Ulead DVD Workshop yet(not had time).If it accepts the format then fine (the kids can take it to there own room) if not it will have to be played on my PC to the TV (consistently :( )
BTW digitize, the aspect should have read 680x344 (1.977:1)as reported by gspot 2.0 software, sorry if my post looked lame. Thanks for your help. ;)

Anyone else have any ideas? (please!)

[digitize]

hey, sorry i couldn't help too much, i don't know too much about ulead or anything like that. And im somehwat of a newbie, but I wouldn't think altering the fps would do anything to sync the video/audio. That's just changing the amount of frames per second. And like I said, 29.97 fps is interlaced ntsc, not sure why you'd want to change it to 25 fps (progressive pal). If anything, you'd just want to do a ivtc and get it to play at 23.976 fps (progressive ntsc).

[digitize]

hrrrm, should've put this in the last pst, but if you use avisynth decomb or tmpeg to ivtc, it should not affect the length of the vid, not sure as to why that is happening.

[digitize]

heh, sorry again, but if you for some reason need to convert to pal (from ntsc) here is a guide: http://forum.doom9.org/showthread.php?s=&threadid=30709 hope this helps somewhat.

[kakomu]

First off, just changing from NTSC Framerate (29.97 fps) to Pal framerate (25 Fps) isn't going to help since it's going to retain all the frames and then play them slower. My suggestion would be to IVTC to 23.976, and then speed up the audio and video to 25 fps. This may cause jerky playback depending on the source (progressive 29.97 fps video like from Video Cameras will, Film source from a DVD may not).

I'm no expert since I rarely touch Pal material.

[greig2000_uk]

OK, thnx for the help guys, another question - what is IVTC and where do I get it? Iv never heard of it before.
I will try the IVTC and the guide if I get no joy I will try and burn the NTSC file.
Cheers.

[lipton]

Is the video sync to begin with?
What I would recommend is that you encode the audio and video seperately and then mux them together

[MasterYoshidino]

argh!

ITVC=inverse telecine

its to pull out excess frames in a DVD NTSC movie

it can cause a decrease in file size and processing times but may cause certain scenes to have some erratic jerkiness
(i.e. panning across a field at a specific speed)