sound problem-need help

[unique77]

Alright, im very new here, so i want to thank you in advance for any help i may recieve. Anyways, I have a mp4 video that the sound is offset with the video. In other words you can watch the video but the sound comes after they say something. I would really appreciate any help on how to fix this or if I can't, how to prevent it.

Thanks, Ryan

[celtic_druid]

Should be able to adjust the delay with mp4box/yamb. As to how to prevent it. How did you create the mp4?

[unique77]

It was a video of a concert a friend of mine sent to me, and the playing is just like a second off. I got the mp4box/yamb thing, but i have no clue on how to use it to fix anything.

[celtic_druid]

Extract audio and video, then remux and use the media delay option for the audio.

[unique77]

Do you know any good programs for converting mp4 into avi, because i can't use those extraction features unless it's an avi

[celtic_druid]

Works fine for mp4 here.