Nero VCD audio/video sinc

[stormy663]

I have been making VCD's from avi files (tv shows) for a few months now using Nero 6 and have not had too many problems. I burn them onto a CD-RW or CD-R, watch the show and go onto the next one. Within the past 2 weeks I cannot seem to get the audio & video in sinc for the whole program. It starts off okay, then about 10-15 min into it, the video and audio do not match. I have updated the codecs (divx & xvid) with no success. I have even tried powerproducer gold.

Any suggestions?
Stormy

[redwudz]

Sure, check the AVI for MP3 VBR audio by dropping the file into VirtualDub, if so, follow the instructions.

[stormy663]

Sorry, I forget to mention that the avi file plays without any audio/video problems on the computer before burning.

[redwudz]

VBR audio plays fine on a computer, it's when you try to use it to encode that the sync problem comes up. Have you checked it?

[stormy663]

No I haven't. I will download virtual dub and check it out. Thanks.

[stormy663]

Okay. Not sure what to do with this info now. VirtualDub is not the most user friendly thing that I have seen. Here is what comes up when I open the .avi file ...

VBR audio stream detected
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VirtualDub has detected an improper VBR audio encoding in the source AVI file and will rewrite the audio header with standard CBR values during processing for better compatibility. This may introduce up to 66342 ms of skew from the video stream. If this is unacceptable, decompress the *entire* audio stream to an uncompressed WAV file and recompress with a constant bitrate encoder. (bitrate: 125.8 ± 27.2 kbps)
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When I go into the program to uncompress and then recompress, I can find no commands/options to do so. If I save the opened file as anything, it uncompresses it into a 9+Gb file that has the audio & video sinc even worse. Next?

[redwudz]

This is a very common problem with Xvids off the web. Follow the directions here for extracting the audio as a WAV file:

https://www.videohelp.com/virtualdubaudio.htm

Then you should be able to encode the resulting WAV audio file along with your original video by selecting each with your encoder. Once you do this a few times, it's easy.

I should mention you don't have to do anything with the video in VD, you are only extracting the audio.

[stormy663]

Figured it out, now I need an encoder. I have Nero6 but I am unsure if I can recode with it. Any suggestions?

[stormy663]

Also, maybe you can help on another semi-related topic. I want to convert a roughly 425mb mpg file to avi. When I use virtualdub, it creates a monster 19gb file. How can I convert it to roughly the same size avi file?

[redwudz]

Have you tried VCDEasy? I don't do VCDs but it's apparently popular. You could also use TMPGEnc encoder. It's freeware for MPEG-1 like VCD. It will also accept elemental streams, (Separate audio and video files) which you will end up with when you take out the audio as a WAV with VD.

When you use VD with full processing, you need to specify a codec under 'Compression' or it will be save as a raw AVI file. Very large. If you have Xvid installed, just select it. Or your codec of choice. And you can further adjust the size/quality through the codec settings.

[stormy663]

Thanks for your help on this one. Everything worked out great.