Difference between revisions of "Howell-Tempest VC 878B-Q"
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Because each 878a chip is being used to drive 4 inputs, the maximum FPS per input is lower than if there was a 878a chip for each input. | Because each 878a chip is being used to drive 4 inputs, the maximum FPS per input is lower than if there was a 878a chip for each input. | ||
Ubuntu /etc/modprobe.d/bttv.conf contents: | |||
options bttv card=77,77,77,77 | |||
Zoneminder settings: | |||
* Disable V4L_MULTI_BUFFER (found in options >> config) | |||
* Change CAPTURES_PER_FRAME to 2 (found in options >> config) | |||
There are 4 cameras per Device Path (/dev/video0, /dev/video1, /dev/video2, /dev/video3) | |||
The cameras are accessed as Device Channel 0, 1, 2, and 3 on each Device Path. | |||
Revision as of 17:26, 5 October 2014
This PCI card is sold as a generic 16-port Conexant 878a card on EBay. It features 4 Conexant chips and a PLX chip. There are 2 connectors on the outside which resemble VGA ports (DB15). The card is distributed with 2 pigtails (breakout cables) with 8 BNC connectors per input.
Because each 878a chip is being used to drive 4 inputs, the maximum FPS per input is lower than if there was a 878a chip for each input.
Ubuntu /etc/modprobe.d/bttv.conf contents: options bttv card=77,77,77,77
Zoneminder settings:
- Disable V4L_MULTI_BUFFER (found in options >> config)
- Change CAPTURES_PER_FRAME to 2 (found in options >> config)
There are 4 cameras per Device Path (/dev/video0, /dev/video1, /dev/video2, /dev/video3) The cameras are accessed as Device Channel 0, 1, 2, and 3 on each Device Path.
