Jitter Sampler
Hello,
I am working on a video sampler in Jitter and I am not sure whether I am doing something wrong or what I want to do is too demanding for my computer, which is a brand new MacBook Pro Intel Core i7 2.3GHz with 8Go DDR3.
The idea is to be able to play several short non-looped videos (here 6) with great accuracy from the computer's keyboard, a midi controller, or a live.step
I decided to separate the audio from the video since I am not convinced about the ability of spigot~ to read from the hard drive with a great accuracy. So, inside a ploy~ object I have a jit.qt.movie and a sfplay~ running at the same time. Each instance is muted when not used.
Outside of poly~ in the main patcher, there is a single output for the audio, 6 jit.pwindow to display each of the instances and a simple patcher to route keyboard keys to videos.
When I play more than four videos at the same time the videos totally go wild. They are not fluid at all, slow down, it is ugly and sad.
I tried to uncheck overdrive in the DSP Status, I tried the message [loadram 1] to the jit.qt.movie.
I tried to use a playbar instead of a qmetro. I tried to used metro instead of qmetro and I tried them with different rates. I tried with lighter videos.
I tried without a poly~, in bpatchers...
I really need a hand here!!
Thanks a lot,
polytestvideo :
Main Patcher :
In the main patcher, you have a typo in the "target 0, loadram $1" message box. That will mean your computer is trying to read off the HDD, which will bottleneck your system.
I haven't tested this fix, but it should improve matters dramatically. The behaviour you are reporting seems consistent with that problem.
Oh thanks, but even when correcting it and trying loadram 0 or 1 it doesn't solve my problem...
Thanks anyway
So would it mean Jitter // my computer can't handle 6 jit.pwindow and 6 jit.qt.movie at the same time ?
Any idea ?
Should I go for another software like vvvv or modul8 ?
or should I wait 10 years ?
search the forum for "jitter optimizations" or something similar.
the following article should come up, which is still relevant even after 5 years:
http://abstrakt.vade.info/?p=147
the following tutorial goes even further in explaining optimized video playback systems:
https://cycling74.com/tutorials/the-video-processing-system-part-1/
this video will be of interest as well:
https://cycling74.com/tutorials/work-your-framerates/
Thanks a lot Robert, I am looking at these right now.
Robert, I love you!!
These links are very helpful.
Actually a simple qlim after my multiple metro objects, as well as unchecking the onscreen option of the jit.pwindow did the job. I am very happy.
Hope this could help other Jitter newbies like me.