I am starting out preforming these types of rips. I understand that there are sometimes delays in the Dolby and/or DTS audio files.
Should / how do I correct this? Should I correct before converting the audio first before converting to wma?
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For the love of God, use hub/core labels on your Recordable Discs!
Eac3to handles any delays etc. automatically when you extract & encode from m2ts. Could read the details here:
Edit: Sync problems could also happen because of improper video stream encoding, not necessarily because of audio stream demuxing/encoding. Try eac3to and if still have sync issues, look into the video part...
I have also frequently faced the same problem and after some try and error time, I understood that the problem was coming from the video frame rate. My re-encoding software was setting 25 fps by default while the movie was using something like 28.97fps. Setting fps to 25 will add almost 2 frames per second but will use the same audio file. The immediate consequence is that the audio goes completely out of sync after a few minutes. So depending on what you are using to re-encode your files, you should check if your software allows to set manually fps.