Ac3 23976 to 29970 please help

[Dj_Rainaldo]

I have a ac3 file but doens match the movie cause the movie converted from 23976 to 29970

My question is is it possible to covert ac3 23976 to ac3 29970
and how.

i tried besweet but the out come is small file coverted to 1.1 instead of 5.1

[adam]

A conversion from 23.976fps to 29.97fps doesn't actually change the playback speed of the movie. Rather than physically speed up the speed of the frames, new frames are either added or removed. Of course this is done by repeating fields, not frames, and per a specific pattern, so you don't notice the change. My point is that after converting 23.976fps to 29.97fps, or vice versa, the audio should still sync perfectly regardless. Most NTSC commercial DVDs are in fact encoded at 23.976fps and converted to 29.97fps on the fly by the DVD player.

So my question to you is how did you convert the framerate of the video? If there are any sync problems its probably because of the way the video was encoded, not how the audio is going to be encoded.

[Skynet107]

Adam is right any encoder worth its salt will keep the total playing time the same when coverting from 23.976fps to 29.97fps. The question is why do this? 23.976fps is compatible with any NTSC DVD player as long as the video has the 3:2 pulldown flag embeded in the file. If it does not, use pulldown.exe to inject the file with the pulldown flag. The file size will be exactly the same but it will be DVD compatible.

Converting from PAL to NTSC DOES change the playback speed but that is another story.

http://www.digital-digest.com/dvd/downloads/pulldown_gui.html

[Dj_Rainaldo]

thanks guys for you reply