The problem mostly occurs with integrated webcams (likely related to pci-e webcams in recent Macs, which driver won't provide a suitable QuickTime interface, since the old library has been deprecated in 10.9 Mavericks...). Macam is a driver for external USB webcams, and may have its own problems with recent versions of Mac OS...
2015-03-18 17:05 GMT+01:00 Jaime E Oliver jaime.oliver2@gmail.com:
Macam wasn't mentioned, but although it is not currently maintained, it is also free and supports several cameras still.
best,
J