View Full Version : optical flow
May 9th, 2007, 06:38 PM
Anyone who know how to use optical flow feature?
May 10th, 2007, 03:25 AM
i tested optical flow. I used it. First you have to push the brake button. to hold on the update of your flow. then you connect the footage in your optical flow. after that you can choose, to use rgb rgba or uv or alpha. i tried rgb but everything works........ then you have to fine up the setup.........then you cach out the whole sequence........(it takes long time, sometime, it depends on your settings) after that you can add more motionblur to the scene.........and it works really good.
the other way is to key the lengh of youre footage. you can make longer your footage with that option... and it takes more time to compute.
i hope you understand what i mean. my english not is not the best:)
May 10th, 2007, 06:50 PM
Thansk for your reply but
I didn't understand how to render optical flow cache file. Do i have to use write node to make cache files? or is there the other option?
May 11th, 2007, 05:02 AM
oh sorry, you understand it, a bit wrong. to cache out the simulation you only have to play up the whole sequence one time. you can find the settings for caching and the level of details inside the optical flow node - settings......... their you can choose, if O. Flow has to use forward or backward or bidirectional frames to compute.
short: push play and play through the whole sequence and you got your, cache. but patient, if you edit the settings you have to recompute the whole sequence. try to cache out only one frame and make your settings with that one frame........ it cost alot of time to cach out, and it need a lot of disk space. ......
and dont forget, you can choose your cache savepath in the optical flow node, too. Thats a good way to save your cache on other disks. I use a cache folder in my work, on other disks.
and happy rendering...........