spierala

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?

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.

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.

record-qt-movie-in-realtime-at-25-fps

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 

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.

actually i get enough framerates 25. i can record dv pal at 29 fps.

if I deactivate the realtime option I get a 25 fps movie, but it?s not realtime.

actually i get enough framerates 25. i can record dv pal at 29 fps.
but I want to limit it to 25.

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 

Am 23.06.2006 um 10:27 schrieb flo spier:

> actually i get enough framerates 25. i can record dv pal at 29 fps.

> if I deactivate the realtime option I get a 25 fps movie, but it?s 

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.

>
> Hi!
>
> 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.
>
> cheers
>
> flo


record qt movie in realtime at 25 fps