Im wondering if there is a hidden, magic pin deep inside the videoin.node for faster my Usb2.0 webcam?
One says it can stream up to 25fps/640x480px but in fact it doesnt (in combination with massive other nodes). Some ideas of giving it a little push - like the feeling for it of having priority for me and how can I do it?
Or do you have a link to a side where camowners talk about their worries?
First thing to check - soory to state the obvious here - is: Do you get the full video performance out of any other aplication?
Note that USB cameras will likely auto-degrade their frame rates (without visible error messages) when you use the wrong, or too long, cables. Also, not all ports on a pc need to be equal. Hubs or additional devices can also slow down transfer rates, of course.
back to my webcam topic:
-I use a webcam (Creative Notebook Ultra) that can give me 640x480px at 25fps. Only with 4.5m Usb cable. I tried all Usb-Ports and found a fast one. I set all sttings in porperties manually and switched autostuff off.
-My second videodevice is a DvCam Sony Dsp 150 that gives me 720x576px at 25fps. Connected with 3m Firewire cable.
-Together in a simple patch (only videoin and some shaders and merge the image) both can give me the full 25fps at full res.
-But in my patch, it has got a bunch of textures and nodes, the webcam slows down at 14fps.
I played a little with some values and found an interesting point:
-The slow down of the webcam only occurs if I boost Vvvv (set prog priority to high). I think that reduces the power for the “system” process in taskbar, that obviously control the webcam datastream. Vvvv then runs at 20fps.
-Before boosting Vvvv the Webcam had gave me 20fps (what is quite enough for me), BUT Vvvv runned only at 8-14fps (what is like “Daumenkino”).
-Next step was to split the Cpu-Account. Give Vvvv just one Cpu (I have a 2 Cpu-System). Works better with boost mode: Vvvv 15fps AND Webcam with 20fps. Tada!
-But now the Dvcam has got a delay of 3-5 frames. 8-((((
So is there a way to change priority and Cpu-account of “System”-Process in taskbar? It just says me no way “Zugriff verweigert”.
Sometimes I feel like Indiana Jones in jungle of technics. Solving a quest is start of the next one. I hope I´ll find the lost pyramids :)