Is there a good way to control a video (comes via FileStream - VideoTexture - Quad) dynamically with vvvv?
In detail, I want to control the speed and the direction (forward or backwards) of the video and change it at runtime.
I tried several approaches so far which didn’t really satisfy my needs:
played around with the “speed” pin of the FileStream-node but it seems like the speed cannot be increased over a certain level (values higher than about 10 didn’t bring differences any more)
set the speed to minus-values but the video doesn’t play in reverse…?
exported the whole video as image sequence, but loading the single jpgs as frames is way too slow (about 3 images in 2 sec on my MacBook Pro)
Any suggestions, hints, whatever? Is it even possible to do what I want with vvvv?
I’ve done it by setting the doseek pin to 1 and then using a LFO and map node to step through the frames, not ideal but it works, you need as fast a drive as you can get to do multiple layers
- exported the whole video as image sequence, but loading the single jpgs as frames is way too slow (about 3 images in 2 sec on my MacBook Pro)
if you stick with this technique i can highly recommend to convert your JPGs to DDL-texture files first. results in faster loading times although the file sizes will be bigger.
regarding reading image sequences:
- make them multiples of 2, preferably 512x256 or so
- in the filetexture node set the desired size to the same value,
set format to R8G8B8, set mipmap count to FromFile (which means no mip maps in case u r reading jpg-s)
now u should be able to read jpgs with 25-60 fps from a 5400 rpm laptop hard drive