Xvid avi - audio - video

[snappy_carp]

Xvid avi

Am new to video editing and need help.
I have the following programs
-virtual dub
-dvd santa
-tmpgenc
-sound forge 6.0

I have two halves of a avi movie (separate files)
I would like to join them and burn DVD.
There seem to be several problems.
1) audio on 1st file goes out of sync after approx 10 mins.
2) both avi's get an error in virtual dub as follows
- .. detected improper VBR encoding in source avi...may intro 13743 ms skew...decompress to wav
and recompress with constant bitrate encoder...(bitrate 136kps +\- 19.2kps)

My questions are as follows

1- how do i accurately determine where audio goes out of sync and how do I repair it
2- how do i ( recompress with constant bitrate encoder)
3- what is best way to rejoin wav to video file with (tmpgenc or virtualdub) after fixing audio
4- If possible would like to rejoin halves before burning.






Thank you all in advance

[Stormin Norman]

Use VirtualdubMod, join both files. Demux(save .wav) the audio to .wav , then diable your mp3 audio and add your .wav file, set .wav to full processing mode and select your mp3 audio you want, select your video stream to direct stream, then save as.

[Gurm]

I'd actually demux BEFORE joining, but otherwise yeah what SN said.

Here's the situation. The audio doesn't "go out of sync" at one specific spot. It goes out of sync because the monkey that encoded it used a shitty audio compressor. If you're just trying to play that file and let it run from beginning to end, it'll probably stay in sync ok so long as your player is forgiving. But try to do anything with it, convert it, etc... and you discover what you've just learned - that it goes WAY out.

Sadly, the number of monkeys is nearly infinite, so this is something you'll have to get used to doing. Just use VDub to save the audio track off as a WAV and/or convert the audio track to a PROPERLY encoded one. Either way.

[snappy_carp]

thanks guys tried that, doesn't get rid of sync prob
reran video slowly and found that at approx 7:50 goes pixelated very briefly , it is from that point that the audio goes out of sync.
Tried demux, rejoined video to audio was worse.
appears i will have to repair video as well.
Not quite sure what to use and how would appreciate input on that.

Thanks again

[mats.hogberg]

I shouldn't join at all, until authoring. I'd extract the mp3 audio from the AVI (Load the AVI in GoldWave, Save).
Encode AVI video to DVD specs m2v (any mpeg 2 encoder - TMPGEnc?)
Encode wav to AC3 (ffmpeggui).
Repeat for AVI #2
Author as 2 parts of the same title (TMPGEnc DVD Author).
But if the AVI has errors, you might be in for some really hard work, where mostly the easiest way out is to try to find an error free source. (Or go out and buy it, if it's available).

/Mats

[Gurm]

Yeah. There's a tutorial... at Doom9, I think, although my memory might be failing me... on "fixing" your sort of problem, where not only is it a poorly encoded VBR header but the AVI has errors. Check over there and see if you can hunt it up.

[snappy_carp]

Thanks Guys been great help.
There is a post on doom9 that addresses my problems.
First i will try better source.
Will tinker with this one as I have time, looks like it will be ponderous.
I'm up for the challenge tho, am determined to figure this out.
Will post as things progress

I think this is a great forum, am looking forward to learning more.