Video and audio not together

[arido]

Hello

I have this problem, when I try to play my divx (xvid) on a stand alone dvd player I see that the video doesn't go with the audio, there is some delay in the audio, so the film is not watchable any one has a solution or knows the problem?

Thanx

Take care
Ari

[guns1inger]

At a guess, the audio is VBR MP3. You can try extracting it as a CBR MP3 from virtualdub (or as uncompressed wav and then converting afterwards), then adding it back to replace the original audio.

[arido]

Thank u for the answer, but the audio of those files is MPEG Layer-3 and not MP3, is the solution u mentioned is usable for this one as well?

Thankx again

Ari

[guns1inger]

MPeg layer 3 = MP3. MP3 comes in two varieties - Constant BitRate (CBR) and Variable BitRate (VBR). Many players and converters have problems with VBR MP3 audio.

Use G-spot or avicodec to determine if your audio is VBR. If you can't work it, take a screen shot of the output and post it here. Instructions on posting images can be found in this post https://forum.videohelp.com/viewtopic.php?p=1322414#1322414

[arido]

Yes u r right it is VBR, could u tell me in steps what do I have to do, I already extracted the audio to WAV, but I didn't know what to do after that, I did try but no success, the video has to be Direct stream, isn't it?

Thanx
Ari

[guns1inger]

This process uses Virtualdubmod, just because it's stream handling is easier to work with.

Load up the avi file. If it is VBR MP3 you will get a warning diaglogue and an offer to re-write the stream header. Click Yes.

Streams->Stream List. Right-click on the stream and select Full Processing Mode. Righ-click again, and select Compression. You now have two choices

1. If you have the right codecs installed, you can select MP3 and a decent bitrate (at least 128kbps).

2. If you can't get a bitrate above 56kbps, select Uncompressed PCM.

Click OK, then click on Save WAV and save the audio to a new file.

If you saved the wav as uncompressed audio, you willhave to open it in an audio app that can save CBR MP3 and create a new audio file. If you saved a CBR MP3 file, or have created one with an audio app, while still in the streams list, click Add and find your file. High-light the VBR audio stream and click Disable. Right-click the streams list and click on Direct Stream Copy. Click OK.

Finally, File -> Save avi and create a new file. Confirm that the new audio track is in place, and is CBR.

Try playing this back in your player.

There are times when trying to convert the VBR audio does result in sync issues that come and go throughout the length of the track. There is no easy solution to this, and for my money, it simply isn't worth trying to fix these situations. However this process works most of the time for me.

[arido]

Thank u very much for the information, but unfortunetly it doesn't work, I have tried several bitrates, like 128, 160 and others but the result is the same. I have tried also the Interleaving function, this work beter, it is not perfect but I get some thing that I almost can wach I think that it has to do with the timing of the audio, it begin some seconds before the movie, but I can't know how many seconds or ms before. Do u have any idea for this?

Thanks again

Take care
Ari

[guns1inger]

Under Interleaving there is a skew field. You can use this to make the audio start earlier or later. The actual numbers will be trial and error to a degree.

[arido]

Yes, I thought so, so I will use the interleaving function, but I didn't use the skew, I disabled it actually and used the function below of Delay if u know it . But sure the first part of the solution is very good, how to rip the audio and to put it back.

Thank u very much for all the help

Take care
Ari