Can fixing truncated .mp4 mess up with a/v sync. ?

[mobbdeep55]

Can fixing truncated .mp4 -with untrunc- mess up with a/v sync. ? I'm sure if there is any asynchronization, it would not be significant because i can't tell if there is by just watching and listening.

Video:AVC
Audio:AAC LC
Source: OTT TV captured by ffmpeg

[johns0]

There's a good chance there will be sync problems cause sometimes the audio or video will not match after being fixed,you will need to resync it if they are still out of sync.

[mobbdeep55]

if its a show and it got the same starting/finishing credits thing, how can i do anythng to check - and fix - asynchronization if i have a reference episode.