Originally posted by Jon55 any way to turn my Pentax KX into a video conferencing cam (Zoom, etc) in Ubuntu?
Simple answer. No.
Any camera of that age is not going to have a digital output, only composite Analog video, and when compared anything current, Analog video does not have the required quality.
If you're doing video conferencing via Zoom (or even -shudders- Skype), you're better off with a USB connected camera, such as the Logitech 920, Brio, or the Mokose C100 (found on Amazon) and a headset boom microphone.
The Mokose is a C/CS mount camera, so Pentax 'Cosmicar' lenses will fit on it.
For any of us thinking of using a newer Pentax with HDMI, the answer is the same, thanks to Pentax bollocksing up that part of the firmware - look for the thread I created years ago after testing the K-3's HDMI output - no "Clean Feed' output option, so it's not usable in a video presentation or for use with external recorder.
ProTip for Video Streaming - get your sound right, then get your lighting right, the source of the vision is less important then getting those two factors sorted.