krosullivan@gmail.com

I came across this problem working on a video a couple of months ago. I don't use jitter that often but I made a couple a FX including a relatively simple motion blur that I wanted to use on footage for a movie. The video played perfectly but when I went to render it so that I could use it in Final Cut it had totally slowed down. It seemed like the system just couldn't handle it (even on a new Mac pro). What is the best way of rendering footage in jitter? I think I was using [jit.qt.record] at the time.

rendering-2

I am a total "jitter virgin" but people have suggested to me that the most reliable way to "render" video out from Jitter is to use a FW output and to record with an external DV device (like a DV cam or a recorder). If I understood correctly, dumping the AV output into FW takes a lot less CPU than both generating the AV feed and recording it to disk in realtime..

You can use jit.dx.videoout (Windows)/ jit.qt.videoout (Mac) modules to handle the FW output.

depends on what you're doing in your patch.

if it's just quicktime movie through some matrix processing the best way is probably with qt.record in non-realtime mode. you send the framedump message to your qt.movie, which spits out all the frames of the movie as fast as it can. each frame goes through your processing chain, and gets recorded as a single frame by the qt.record object.

however this prevents user interaction during the recording process, however the solution is creating a simple gesture recording system, and playing it back during the framedump.

other possibilities are softwares such as fraps or iShowU, which work great.

i've never tried firewire video out, but seems like a good solution as well.

Rendering