Synchronizing Sounds with Video

[jarko]

Hello.

I have a standalone divx player but when i try playing an AVI file the player doesnt support the sound file and it doesnt play.

When i have avi file i have to change the codec of the audio file so that it can play on my standalone divx player, but sometimes i have to change codec of this file and sometimes problems start to happen. When i change codec for divx or xvid sound starts to pass the picture. It grows, later on it gets even more unsynchronized.

Can anyone help me and tell me step by step how i could fix this??

[Kunta Kinte]

It might help if you stated what program you used, along with the settings.

[jarko]

VirtualDub

[Kunta Kinte]

1. Load the video into VDub.

2. Select File=>Save Wav. Name the wave file and save.

3. Select Audio=>Avi File. Load the new wave file.

4. Select Video Compression and your XviD codec.

5. Select File Save As... and name your new file, then save.

Your new file should now have the proper audio.

[mats.hogberg]

It could also be, that the AVI has errors to begin with. As you can't tell until you've managed to get both audio and video in a format your player handles, it sems like the problem is with your conversion, rather than the source.

/Mats

[jarko]

Hi

I have to tell you everything from beginning:

I wanted to change codec (video compression) for avi file because my standalone divx,mpeg4 player didn't play this one which avi file was compress.
Everything with synchronizing was ok but when I tried to open in Virtualdub I've got message:

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 compability. This may introduce up to 2975 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: 129,0 7,4 kbps)

After this message I press ok button and I started to change video compression. When it finished audio was not synchronized with video.
I did this what you tell me: I save wav file and later I connected this to avi file but still is not synchronized. In this message which I've got on the beginning it said something about bitrate but I don't know how to set up this.
I do know some things about video file processing but really I don't know more that I know.
Can someone help me with this problem because long time I've tried to solve this but I never succeeded
Already few time I started to resolve this problem and I never was able to finish with good score.
I'll aprecciated if you explain everything step by step.
Thanks in advance

[jarko]

Can someone help me ?

[mats.hogberg]

Load original AVI in VDub. Don't let VDub change audio header.
Save mp3 audio direct stream
Decode mp3 to wav (CDEx).
Load AVI in VDub again, select wav audio and your new wav.
Encode.

/Mats

[jarko]

Thx ! I'll try tomorrow.

[jarko]

Hi

Maybe for you this question will be stupid but I don't know how to save mp3 audio direct stream in VirtualDub. Can you tell me step by step.
Thx !!!!

[mats.hogberg]

Load AVI. Don't let VDub do anything with the audio.
Select Direct Stream Copy under the audio menu.
Select Save WAV... under file menu.
The audio from the AVI will be saved as a separate file to disc. It will end in ".wav" no matter what codec is used, but since you know it's MP3, just rename xyz.wav to xyz.mp3
Decode to wav.

/Mats

[jarko]

Hi

Thank you very much for ur help. I did everything like u tell me.I fix one file and looks Ok. I have few more because this movie has few parts but I hope that everything will be the same way.

[jarko]

I fix few files but now I have the same problem with another avi file and I'm not able to synchronize sound with video. I did everything like before but it doesn't work. There is another way to fix symilar problem.