ac3/m2v sync issue - Can't find post

[trillium]

I had a post bookmarked (I think) on how to fix this issue, but I can't seem to find it...can someone help me?

I have an ac3 file (192 kpbs/48 kHz) that is the sound file for a 6:48 second long VBR Pass2 movie that I have encoded. All the other capture/encodes worked fine out of this series except for one, where I am trying to fix the sync issue.

Unfortunately the originals have been deleted, so I don't have the original avi or the PCM Wav file to go back and look at....

the audio-sync issue is a very minute amount but noticable being that it is animation...

thanks for your help!

[nerdboy69]

I know nothing of the original post, but assuming the sync is out by a fixed amount from the start and does not get progressively worse through time, then have you tried the latest BeSweet (the Beta, not the stable)?

I have not used it myself for this prupose, but I noticed it allows you to insert a lead-in time assuming you can figure out how many fractions of a second it is out.

[trillium]

It is a set amount... thanks for the info on BeSweet (I probably have an older version).

Any idea how I can determine what that offset is?

[nerdboy69]

No not really. This has always been a pain for me.

I try and "best guess" based on a key scene that has something featured that has a distinct sudden sound, but it takes ages to get right because it really is just trial and error. Would be interested to hear if anyone has a better method.

If your video & audio streams are huge you may want to shorten to something small so you can experiement quickly to find the offset before doing on the originals.

Have fun.