compress audio to a constant bitrate

[thecrock]

I changed the framerate of a movie using virtualdubmod for video and besweetgui for the audio, then loaded back into vdubmod and get the message that i have to re-compress the audio to a constant bitrate. My aim is to burn the end product to dvd. What would you suggest is the best way to get the audio back in sync-as changing it with vdubmod can be a pain.

[DarrellS]

I changed the framerate of a movie using virtualdubmod for video and besweetgui for the audio, then loaded back into vdubmod and get the message that i have to re-compress the audio to a constant bitrate. My aim is to burn the end product to dvd. What would you suggest is the best way to get the audio back in sync-as changing it with vdubmod can be a pain.

Sounds like besweet turned your wave file into a VBR MP3. It drives me crazy when I hear the experts telling all the newcomers to use these programs but what are you gonna to do? If you want to know the correct way to make AVI files then I would suggest the VirtualDub forum which specializes in AVI and stay away from Doom9 and this site.

My first question is why did you change the framerate? If you change the framerate, then the audio will be out of sync and by using VBR MP3, a video will be out of sync if you edit it or just re-encode it.

I need more information before I can help. Preferably from the original file if you still have it. A screenshot from G-Spot would help. Also, is the original file out of sync?

Fixing VBR MP3 audio is a simple step. You just save the audio as an uncompressed wave file and reinsert in VDub (I would use VirtualDub and not VirtualDubMod unless you do alot of frameserving. VirtualDub MPEG-2 is my new software of choice since it is exactly like VirtualDub with the added feature of editing MPEG-2 files).
Fixing the out of sync problem is a different issue and you need to use a program like Goldwave and timewarp the audio to match the video but if you change the framerate from a DVD compatible framerate to an off the wall one, then you will have an out of sync DVD when you convert the AVI to DVD ( 23.976 will convert correctly in VSO DivXToDVD but a 24.11 file will be out of sync once converted to 29.97 DVD) .

[celtic_druid]

If the end product is DVD I would suggest that you have BeSweet output AC3 or wav for encoding via something else.

[DarrellS]

If the end product is DVD I would suggest that you have BeSweet output AC3 or wav for encoding via something else.

Why is Besweet even needed? VSO DivXToDVD outputs to an MPEG2/AC3 VOB file in a VIDEO_TS folder, ready to burn.

The biggest problem I see right now is changing the framerate. The VBR MP3 audio is easily fixed by saving as an uncompressed Wave file with VirtualDub.

Once again we have a thread where we know absolutely nothing about the file that the poster is working with. Is it an AVI, an MPEG1 or a MPEG2? What is the framerate? All we know so far is that the person changed the framerate of their original video file and it is out of sync. Oh yeah, and that they converted the audio to VBR.

[thecrock]

The file was an avi and i changed the framerate to test whether my standalone would play the movie with less jerkiness. I changed from 23.967 to 25 fps as my dvd player is pal. Just an experiment as ntsc seems really jerky on my dvd player. So will vso divx to dvd change audio and video framerates for me at a flick of a switch?
Thanks for taking an interest guys.

[DarrellS]

So will vso divx to dvd change audio and video framerates for me at a flick of a switch?

Yes. You can take your 23.976 files and under Standard, choose force PAL 25fps and it will convert it to play on your player.

[thecrock]

I will try it out and tell you guys how it worked out.
Peace


EDIT
VSO worked it gave me two vob files for 85 minutes of video, i used vobmerge to join them together and burned with nero.