Howell-Tempest VC 878B-Q - Revision history

Coryhamma: Minor carriage return

2014-10-05T22:27:17Z

Minor carriage return

← Older revision		Revision as of 18:27, 5 October 2014
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	Ubuntu /etc/modprobe.d/bttv.conf contents:		Ubuntu /etc/modprobe.d/bttv.conf contents:

	options bttv card=77,77,77,77		options bttv card=77,77,77,77

Line 11:		Line 12:

	There are 4 cameras per Device Path (/dev/video0, /dev/video1, /dev/video2, /dev/video3)		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.		The cameras are accessed as Device Channel 0, 1, 2, and 3 on each Device Path.

Coryhamma: Added details

2014-10-05T22:26:25Z

Added details

← Older revision		Revision as of 18:26, 5 October 2014
Line 2:		Line 2:

	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.

Coryhamma: 16-port in

2014-10-05T22:17:44Z

16-port in

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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.