Conversion from mpeg to mov: the sound is unsynchronized with video

[rikintosh]

Hello everybody, sorry for my english, I have a very big problem with ffmpeg software.
I want to convert an mpeg video to mov, I think to set all parameters well but the result is a video with the audio unsynchronized with the images. I put some screenshot of control panel for better comprension.
Can you help me? Is very important. Thank you very much

[Baldrick]

Is the source 25fps? Check with mediainfo.

You could also try mpeg streamclip.

[rikintosh]

Yes 25 fps

[Case]

Is the sync off by the same amount throughout the movie? Or does it get progressively worse?

[rikintosh]

Is the sync off by the same amount throughout the movie? Or does it get progressively worse?

No, the sync off is random. Most of the times the sound come before the respect sequence of movie but a time the delay is 2.5 seconds, an other time 7 seconds, 5 seconds and so on. I remarked that often there are short parts of video that are accelerated respect the normal, in fact the original video is 54.46 minutes and the version in mov is 52.38