How to sync DVD audio with BluRay video?

[Batman007]

Hey there,

I have a DVD having English Audio .... DVD's frame rate is 29.970 FPS
And a BluRay having Chinese audio .... Its frame rate is 24.000 FPS

How can I sync the English DVD audio with BluRay video? (I have remuxed the Bluray to .mkv)

Thank you.

[foxyshadis]

I'm moving this out to the newbies forum, because it's more about workflow than audio encoding.

With any luck, you can just start your two audios at the same mark. You probably need to use the video's audio for any preroll, like the studio logo. It should be dirt simple to match up the new audio to the video, one option is to use AviSynth and work with DelayAudio until it's correct, and another is to use Audacity to open the original and import the other, line them up, export and encode.

Unfortunately, it's likely that not every scene will match up. You're going to have to fiddle around in that case, and you'll have to let us know what you're comfortable with before I could recommend specific software.

[Ghitulescu]

Assuming the cuts are the same, one should be able to do this in a multitrack audio editor, synching the movie begin to the movie end, credits, logos, etc being excluded. You can note down the timings and perform the stretching using any audio software that can this (like audacity, eac3to etc.) if that audio software cannot do this.

If the cuts (scenes) are different, then you have a hell of a job :)

[sneaker_ger]

Try eac3to (http://forum.doom9.org/showthread.php?t=125966):
eac3to.exe input.mkv output.ac3 -23.976 -changeTo24.000
Then mux using mkvtoolnix. (Use delay settings if it needs adjustment)

Or: change video fps to 23.976 (24000/1001p) in mkvtoolnix instead of changing the audio.

[manono]

Try eac3to (http://forum.doom9.org/showthread.php?t=125966):
eac3to.exe input.mkv output.ac3 -23.976 -changeTo24.000
Then mux using mkvtoolnix. (Use delay settings if it needs adjustment)

Or: change video fps to 23.976 (24000/1001p) in mkvtoolnix instead of changing the audio.
Except many many Chinese DVDs (if that's what this is) are field-blended from PAL sources. In those cases 23.976 will be the wrong number to use. Without more information there's no easy answer to this one. foxyshadis's Audacity method might work, and even if it doesn't you'll know pretty quickly there's more here than meets the eye.

[AjitK29]

Use MKVExtractGUI and get the video and audio as MPEG and AC3.

[Batman007]

I made .wavs of the DVD audio and .wavs of Chinese audio and then put them in SoundForge and added some cuts and it worked
I see its perfectly synced now

Thank you all!