www.makemkv.com

Title says it all. I've been ripping quite a few Blu-rays from my hard drive, converting them to MKVs. Every single main movie file has the message "AV synchronization issues were found in file [filename.mkv]."

The movies all play correctly, BTW. I don't know if the error message occurrence is new to 1.15.3, or if I just recently noticed it.

viewtopic.php?f=1&t=23347

Plus tons of other topics.

Short version, some of those messages appear mistakenly when there’s no forced subtitles, while the messages that display offset information are genuine but in general MakeMKV works to fix the issues and it shouldn’t be a problem for the end result.