mp4 import problem

i'm trying edit few mp4 files in premiere audio comes in out of whack: in 1 file, audio started off fine , in sync video sometime between mins 2/3 audio's off, , gets worse video progresses; in video, timing's off start.  thing is, running either video through player produces no problems.

 

so far, i've been manually cutting audio , video , relinking them clips need, it's pain.  i'm new program i'm not familiar nuances , features, if it's possible "shift" audio track.  that, though, might not work considering issue of increasing audio delay video progresses (by end there's 30sec of delay, video coming first).

 

the files encoded h264 , aac; resoultion's 1280x720.  suggestions?  i'd prefer not have re-encode them, if so, suggestions on front?

 

thanks!

hmmm.

 

the aac encoding makes me think not camera original media, should using, type of tv broadcast or blu-ray rip, you're not allowed reedit.

 

if that's case, solution stick camera original media.

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