QuickTime Movies

[TAFF]

We are using the FuseX card with ProTools. We are noticing that when we import movie and then import audio from the current movie that the audio is out of sync by about a frame and a quarter. The weird thing though is that the movie and its associated audio is of different lengths. I exported the movie audio in QuickTime Pro and the imported the wav file and they were the same length. We are working in PAL with 6.9.3 cs4 on HD2 Accel . Mac Dual 2,7ghz with 4.5 gb of ram. I just wanted to know if anyone else is getting this weirdness.

Regards

Paul McFadden
Sound Editor
Doctor Who

[TAFF]

I though I'd better clarify that the QuickTime Movie and the QuickTime Pro'd audio were of the same length, but the import from current movie audio was a different length. Both audio files did stay in sync with each other even though the durations of these files were different.

Regards

Paul McFadden
Sound Editor
Doctor Who

[Jon_Atkinson]

Hey Paul,
can't help on the Import Audio from Quicktime question.......

But I just wanted to say how much I enjoyed Saturday's Doctor Who..... My seven year old son and I love the new series!!! Keep up the good work!!

Sorry.... back to the thread.....

[Pythagor]

sounds to me like Pull-down or Pull -up was enabled while importing

Leo

[TAFF]

The audio is in sync once shifted by 1 and a quarter frames. It doesn't drift

[Jon_Atkinson]

Hey Paul,


Does this happen with ALL movie files or just one particular CODEC?

[Jon_Atkinson]

So, just to clarify..... You're saying that PT's function to extract audio from the current movie adds (or subtracts) a header at the start of the audio file of 1.25 frames?

I must admit I usually don't bother with PT's audio extract. PT almost always gives the error message that it can't extract from the current movie with most of the CODEC's I use most (Motion JPEG A, and DV.mov)

I usually export in QT Pro, then import that file to PT.

[Dan Pinder]

I use this all the time without problems. Are you measuring the sync by the pops? I wouldn't read too much into the fact that the audio vs video length is different. Very often I will get a QT running 48/16 that has to be converted to 44.1/24 by importing from current movie, so SRC might alter the length (though it shouldn't).

[minister]

what version of QT? perhaps the problem is there.

[TAFF]

We are measuring the offset against the OMF. We are assuming that this is gospel.