record qt movie in realtime at 25 fps
I?m capturing from DV FireWire Cam in MAX.
i use the jit.qt.record object. I use the realtime option. but I have the problem that the framerates of my captured movies are always different depending on how much cpu power is available for max.
but i need every movie at a framerate of 25fps.
i send this message to start the recording in jit.qt.record:
write /Users/spierala/Desktop/clip1.mov 25 dvpal
so why is max ignoring the 25 framerate in this message when I use the realtime option?
What I need is realtime at framerate 25.
I also tried to capture directly from the jit.qt.grab object, but I?m working with more cameras and I want to switch between them while recording… I can?t do that with the grab object.
so who can help me?
What version of Jitter are you using? "realtime" mode has gotten a
rewrite for the next version of Jitter, and should be much more
reliable, FWIW. Note that decompression/recompression from/to DV is
not a cheap operation, and it’s likely that realtime mode is
dropping a lot of frames, in any case. You might consider recording
to a lighter compression format (PJPEG, Animation) and then
recompressing after you’re done.
i?m using jitter 1.2.4
actually i get enough framerates 25. i can record dv pal at 29 fps.
but I want to limit it to 25.
if I deactivate the realtime option I get a 25 fps movie, but it?s not realtime.
Jitter 1.2.x is not going to be updated for the new realtime mode in
Jitter 1.5.3. For Jitter 1.2.4, you may have to use non-realtime
mode, with a timing gate to ensure that only 1 frame every 40ms gets
to the jit.qt.record object.
Am 23.06.2006 um 10:27 schrieb flo spier:
> i?m using jitter 1.2.4
> actually i get enough framerates 25. i can record dv pal at 29 fps.
> but I want to limit it to 25.
> if I deactivate the realtime option I get a 25 fps movie, but it?s
> not realtime.