reducing divx avi bitrate

[Batman]

Is it possible to reduce the bitrate of a divx avi file (encoded using divx 4.12 codec). For example, can I reduce the bitrate from 1000kbps to say 500 kbps? How would I do it? CompressAVI is supposed to be able to do this, however I am unaware of how to use it? Any other software such as Virtualdub?

Thanks

[khp]

Yes the best tool for this is virtualdub.

To reencode the video select 'full processing mode' in the video menu, then select video->compression, select the divx codec and click configure...(I hope you know the drill from here) and remember to select direct stream copy in the audio menu.

For large reductions in filesize I also recommend that u lower the resulution accordingly, you can do this in virtualdub video->filters.

For minor filesize reductions I prefer to just cut off the endcredits and/or reencodeing the audio, to do this just select to select direct stream copy in the video menu. Usually you can reduce filesize by 5-10% this way.

[Batman]

Thanks.

I'm having an AV sync problem. The video seems fine, however the audio is out of place. How should I fix that? I used the Divx 4.12 codec @ 450 kbps. I appreciate your help.

[khp]

Sorry I don't have a lot of experience with sync problems, I suggest u read this thread

http://forum.digital-digest.com/showthread.php?s=&threadid=3116

[Batman]

Should I try Virtual Dub. According to Nicky's guides, under "framerate" I should select the option "change framerate so that audio and video durations match" However, when I try to save the file as an avi I get the message that the file is uncompressed and is too large. Should I just ignore it and click ok?

In your previous post you recommended that when lowering the bitrate the audio should remain a "direct stream copy" I guess I could try "full processing mode". Then again, I have no idea how that would turn out.

[khp]

Originally posted by Batman
[B]Should I try Virtual Dub. According to Nicky's guides, under "framerate" I should select the option "change framerate so that audio and video durations match" However, when I try to save the file as an avi I get the message that the file is uncompressed and is too large. Should I just ignore it and click ok?

No, the reason you get this is that you have selected 'full proxessing mode' in the audio menu, but you have'nt set any compression.
You should try to solve your problems with audio displacement using 'direct stream copy' as per nicky's guide.
If u have to stretch the audio you have to use full processing mode in that case u must select a compression codec using the audio->compression menu. I usually use mp3 at 128kbits, but you will have to figure out how many bits you can afford for audio.

[Batman]

Thanks for your reply. When I change the 'framerate' so that 'audio and video durations match' I select 'full processing mode' in the video, and 'direct stream copy' in the audio. I guess I must be doing something wrong?


I get the error that the file will be large and that this is an uncompressed avi.

[khp]

When fixing audio sync problems u should always be using 'direct stream copy' for video.

[Batman]

Thanks a lot KHP. It solved my problem.