I'm cutting MPEG-TS files and sync their audios.

[lgblublu]

Hello, I need to make sure my steps are correct. Please tell me if I'm wrong at anything.

1) I cut MPEG-TS with Avidemux at i-frame.

2) Check playback on a media player and calculate proper audio delays playing it at slower speed.

3) Sync the audio track with a proper delay using FFmpeg Itsoffset commandline.

4) Try demux it with Eac3to and check the log. In case there's remaining audio gaps, I note opposite values, return to step 3, and add them on it. And repeat Eac3to.

5) In case there's no remaining audio gaps, I merge them into MKV.

Am I doing correctly?

[smrpix]

If it accomplishes what you want, you're doing it correctly.