how to determine timeshift if audio out of sync

[kinematic]

well,the thread title says it all.
i want to convert a dvd to xvid with mp3 sound but the sound is out of sync and i'm wondering how i can determine how much the timeshift should be.....does anybody know how to do this on linux?

tia :)

[setarip_old]

Hi!

Watch the video, look at your watch...

[kinematic]

lol...i was expecting an answer like that.
bit hard to do...watch the video and my watch at the same time :rolleyes:
but i figured it the delay would probably be about half a second so it set the time shift to 650ms just to try and guess what...it's in perfect sync.

[setarip_old]

Sometimes the simplest concepts are the best ;>}

[kinematic]

but it becomes harder to estimate if it's out of sync by a fraction of a second...with a 650ms delay it's pretty obvious.
that's why i was wondering if there is some kind of utility(wich may be able to run with wine on linux)wich can report exactly how much it's out of sync?

[setarip_old]

but it becomes harder to estimate if it's out of sync by a fraction of a second...with a 650ms delay it's pretty obvious.But 650 milleseconds IS a fraction of a second (65/100ths of one second) ;>}

It actually becomes quite easy to estimate down to aboit 1/4th of a second - Anything shorter than that probably isn't noticeable anyway...

[foxyshadis]

Simple free software just plain isn't very good at correlating audio and video, especially given that sound can be delayed by a few frames naturally depending on how far from the boom the action is, and the tastes of the audio engineer.

Many pro audio softwares will let you import a video for manual timesyncing, usually supporting slowdowns too. Subtitling software (like Aegisub) can do this as well.

[phædrus]

But 650 milleseconds IS a fraction of a second (65/100ths of one second) ;>}

It actually becomes quite easy to estimate down to aboit 1/4th of a second - Anything shorter than that probably isn't noticeable anyway...

When the sound is two frames off, it is disconcerting to me. Two frames 81ms or less than 1/10th of a second. Yes, I know there is the occasional bad looping where the sync is worse than this, but in modern film, usually the live sound is good, and should be in perfect sync.

Of course, your mileage may vary. I think I'm exceptionally sensitive.