carlitos

hi maxers, my first post, although I've been up and down the forum for a few months now...

I have been making a few players which push out pro.res.422 video and 8 channels of audio, direct to window at 2560px with good results.

I use a max interface with a midi synth to start / stop / go to next clip, in conjunction with showing h264 preview versions of the same clips as the main output.

An editor renders out the big 422 files out of FCP and I use quicktime to make smaller h264 preview clips (at "current" frame rate and key frames set to automatic, same duration)

now, when I do a getduration on both clips (both the 422 and the h264 preview) I sometimes get back different frame counts, whilst quicktime tells me the clips are the same length. the occurring problem does not allow me to scrub through the both the clips using a single slider.

So what could cause discrepancies in frame count between the two video formats whilst quicktime says they are exactly the same length? Anyone have any ideas....???

here is a patch (basically) showing the mechanism I am using:

So what could cause discrepancies in frame count between the two video formats whilst quicktime says they are exactly the same length?  Anyone have any ideas....???

different-getduration-values-for-same-length-movies-h264-and-prores422

my search is moving in the direction of finding a way to standardise the QT timebase across all the qt movies....

either by writing straight to the quicktime movie or... there must be a way to read the timebase of a movie in max, or not??? and then solve the problem with some math operations ???

did no one have these quicktime timebase discrepancies before ??

my search is moving in the direction of finding a way to standardise the QT timebase across all the qt movies.... 

ooof, found it sorry, gettimescale, was unnecessarily delving too deep.

could someone please delete this thread? need to find a better question for my first post, come on....

different getduration values for same length movies h264 and prores422