How do I convert the framerate in an avi

[LeeBeaumont]

I have an avi file that I want to convert to SVCD, but the framerate is 23.997, which is not a standard framerate, and this is causing the Mpeg to go out of sinc after encoding .
I konw its possible to correct this, and I know theres proberly a guide on this site on how to change framerates in avi's, but I cant seem to find it .
Can someone please point me in the right direction for this guide, or better yet tell me a really easy way to framerate convert an avi

[theDruid]

LeeBeaumont,

Virtualdub has an option to change framerates (Video->Frame Rate)

The framerate you're talking about though is the standard for NTSC film for VCD - and I believe you can use it for SVCD if you use pulldown.

Unfortunately I know absolutely nothing about pulldown, so I can't be much help.

My approach generally is to keep target framerate the same as the source - so if I have an avi with 23.9fps, I'll just make an NTSC film VCD with the same framerate.

cheers,
mcdruid.

[funkguy4]

Yeah just use the 3:2 Pulldown flag and it will be fine.

[FOO]

That rate is off 3 seconds per hour. :P
Probably due to capture syncing to audio

[funkguy4]

That rate is off 3 seconds per hour. :P
Probably due to capture syncing to audio

I think it's a typo. I think he meatn 23.97, which is how Windows displays it in file properties.

[LeeBeaumont]

[I have an avi file that I want to convert to SVCD, but the framerate is 23.997]


No that was'nt a typo, that the exact framerate that VirtualDubMod tells me it is, I think im on top of it now so thanks to you guys for ya help.
I decided to go with "funkguy4" advice, and TMPGEnc is chewing away at this moment.

[funkguy4]

[I have an avi file that I want to convert to SVCD, but the framerate is 23.997]


No that was'nt a typo, that the exact framerate that VirtualDubMod tells me it is, I think im on top of it now so thanks to you guys for ya help.
I decided to go with "funkguy4" advice, and TMPGEnc is chewing away at this moment.

That is one weird-ass framerate.

[FOO]

Not that wierd. It's one dropped frame in every 1200

[funkguy4]

Not that wierd. It's one dropped frame in every 1200

What's the point in that?

[FOO]

Most capture software maintains audio/video sync by
adding or dropping a video frame every once in a while.
If that happens, Vdub will report a sightly non-standard
frame rate.

Lets say you capture 2997 frames in 100 seconds,
and the capture software dropped two. Vdub would report
29.95 fps

[LeeBeaumont]

OK, I've done it !!! . (PLEASE SOMEONE TAKE THE TIME TO READ THIS).
I would like to take the time to tell how I did it, because I would like someone to tell me if this is a practised method of correcting frame rate to match audio when converting to SVCD, as I have'nt seen this method in any of the guides and I really just came across it by accident, but think it could be really usefull to others for correcting this problem, I did try both the methods you guys suggested, but with little success (I put this down to me as I'm still a little of a noob at this).
Anyway, I'm a big fan of "DVD2SVCD" for converting cos it does most of the setting up for you when converting AVI2(S)VCD, and if you use "DiVX (AVI) to (S)VCD using DVD2SVCD - By: LeeBear - ver. 1.0", you can't really go wrong (A really good guide for noobs), and the end results are excellent quality.
The trouble is this guide is of little use if your source avi is of a different framerate to the end product you want (I wanted to convert my avi which was at 23.976fps to PAL SVCD 25fps), my problem was made still worse by the slightly off framerate of my avi (23.9768) .
How I got over this was by using "BeSweetGUI" and "2Lame" software, I knew that the DVD2SVCD bundle used this software, but I have know idea how to edit command lines, I then ran the convertion the way LeeBear's guide tells you to and had the "Movie" folder open in the DVD2SVCD directory so I could see the files that were created by "BeSweet" as it did its job, I was then able to use the GUI to point to the "Input" and "Output" files for BeSweet and "2Lame" to these file that were created, once I had this set up I ran DVD2SVCD's process again and it still seemed to work fine, the only difference was I had managed to get some control over this part of the process.
Then I started playing with the settings in BeSweetGUI, and it only took about 1 hour to become reasonably familier with the settings that really mattered, I noticed while playing about with it that in the "2Lame" section of BeSweet you could make the framerate of the output file different to the input file, so I put in my avi value of 23.9768fps as the input value, and 25fps as the output file rate.
I then ran the whole process from AVI2SVCD, as instructed by LeeBears guide, I did'nt hold much hope out that this would actually as most of what I had done was guess work on my part .
But to my utter astonishment the Mpeg I ended up with was perfectly in sync , so I tried it on another 23.976fps avi I have and that was fine aswell, I know some of you out there proberly have a hundred different ways of doing what I explained above, but I think this method would benifit poeple like me that know a little, but arn't experts at convertion and encoding, and this method can be used alongside LeeBears guide.
Would one of you guys tell me if this method is new and worth attempting to write a more detailed guide for (I may need some help with that if it comes to it ), or have I just stumbled on an already well used method, or worse still, am I making a meal of something that could be done far easier another way .

[LeeBeaumont]

SOMEONE ANSWER ME PLEASE !!

[FOO]

So you used BeSweet to resample your
(out of sync) audio to the correct rate. Good work.
Go have beer.