Having problems to sync video with audio

[synnchan]

So... I have an .avi here that's on 60.100/60.102 fps, as it can be seen here:



and I want to make it go down from 60.100/60.102 to 60 fps. So I tried to do this:



then I saved my video but the audio went out of sync. Even after doing frame rate conversion to 60 fps. Like this:



So... basically, I want to do what I said previously. I want to make my video go down to 60 fps but at the same time, I want the audio to be synced with the video.

I was wondering if it's possible to do something on the window below to fix this issue:



But I don't know exactly what to do. Can someone help me please...?

[El Heggunte]

60/60.1 = 0.99833610648918469217970049916805

So you'll need to multiply the audio playback speed by 0.99833610648918469217970049916805,
and then resample the result to a "well-known" sample rate (44.1KHz, 48kHz, 32kHz, whatever).

Easily doable in Avisynth, not sure how I would do that with VirtualDub only

[synnchan]

Oh geez... I suck at avisynth. I always have trouble to write the scripts properly...

So... can you show me how the script is supposed to look like? I mean, the format.

[sambat]

I know there's a 'time stretch' filter under Audio > Use Advanced filtering - might work.
Click on the 'time stretch' box to set the value.

[synnchan]

Three questions:

1) On "video frame rate control", should I check only "change frame rate to (fps)" and set the value 60 or do I need to "convert to fps" as well?

2) Seems like I need to compress the audio to make the filters work. What compression method should I select on the window below?



3) I can see you have "stretch" highlighted on your bottom pic and it confused me. Should I select "stretch" or "time stretch" ?

[davexnet]

Use Time Stretch. Also, the number to put in the box should be
the result of old frame rate/new frame rate.

For example, 60.1/60 = ~ 1.00167

Set the video to direct stream copy/change frame rate to...

If your existing audio is 2-channel, install Lame ACM and use that for the new audio.

[sambat]

'Time stretch' to keep the pitch the same.
You still have to recompress the audio whichever one you use.

Thanks davexnet.