Usb live feed lag

artoo

hi all, i noticed a strange behaviour since 2.1 with the initialisation of my webcams (logitec c920 and others logitec). at the first launch, the webcam appears but there is always a big lag so that i have to quit isadora, change the usb port and relaunch the app again to make my live feed working as expected. it happens every time when i start up my computer, if it's sleeping, no problem: when i re-launch isadora i can use the webcam normaly but if i shut down the computer i must change the usb port otherwise there will be a lag... it doesn't happen with the thunderbolt connection (BM shuttle). isadora 2.1/2.2/2.3.../2.4b13 mac os 10.9.3 maverick macpro 2013 trashcan i hope i'm clear enough (excuse my english)

DusX

Have you checked the logitec site for an updated driver?

fifou

Hi Artoo,

I have close to the same behaviour with my config.
3x Logitech C920 on a MacBookPro. 1 webcam working, 2 webcams lagging. Sometimes, 1 cam not recognized..
My solution is to boot without usb connected, plug the webcams one after another, and then launch Isadora.

Don't know where it comes from..

Best
Philippe

artoo

editing error.

artoo

@dusX: there is no driver for logitec's webcam under osx... @fifou: yes i used to work with 2 or 3 c920 too and we have apparently the same problem... your path to cut it seems great, i'll try it. anyway it's not a big problem ´cause it works at relauch... thanks guys

Skulpture

I have a Logitech C920 and dont have any problems - yet!

fifou

@ skulpture
Maybe it's because you have only one !