On occasons some parts of the movie in MP4 format have this issue, is this a player problem (VLC) or a MP4vsoftware problem or maybe hardware problem Dell notebool?
Ewan. Hindi mo dinescribe yung file e.
But it's most likely a file problem.
Madalas yan sa advance release Russian DVD with Russian dub. English audio is muxed from microphone recordings or line recordings from legit movie theaters.
Siyempre out of sync. Pag sobra na ang layo ng ng advance/delay, hahabulin ng adjust, ok na, tapos lalayo na naman ang sync, biglang adjust na naman. That's why the audio goes in and out of sync, magkaiba kasi ang source ng audio and video.
Pag consistenly out of sync throughout, mali ang sync sa encoding. Pag progressively drifting out of sync, magkaiba ang frame rate ng video and audio. Pag drifting in and out of sync, yon ang mahiwaga, magkaiba ang source ng audio and video, hinahabol lang manually ng adjust as the run time progresses.