AC3 track "phases" mid-playback

[Ramscoop]

I am working with a dual audio, subtitle, x.264 matroska file. Both audio tracks "phase" 609ms (too-early) about half-way through playback (@~46min 40s).

I cannot simply place a 609ms delay at the beginning of the track when I initially mux because the first 46min 40s is synched. I considered using a standard audio-editing suite (i.e. Audacity, etc...) to place a 609ms delay at ~46min 40s but, I was concerned about loss of quality when the project was saved.

Then I found BeSplit (http://besplit.doom9.org/), which appears to perform lossless AC3 "surgery."

Am I headed in the right direction? Is it possible to place a delay mid-track w/ this software?

Thanks!

[tebasuna51]

DelayCut can make the job, but more easy try eac3to:

eac3to input.ac3 output.ac3 -edit=0:46:40,+609ms

[Inspector.Gadget]

Sounds like you have a bad rip, since both tracks are buggy. Rip the original disc again with a recently updated ripper and do your process over; if you're not doing some cutting and pasting mid-movie, then you should at worst get a constant delay.

[Ramscoop]

@tebasuna51 - Worked like a charm, thanks!

@Inspector.Gadget - Yes, the disks are not in great physical condition. A second rip produced similar (if not identical) audio problems.