Capture Card (PV-143) bt878 1 camera = fine 2 cam = broken

[elfking]

Hi All,
I have a machine with a PV-143 (bt878) and when I have one camera on the capture card everything is fine. When I add a second (third or fourth), it becomes broken.

Seem almost like something falls out of sync. I wasn't sure if someone else has come across this already and I just don't know what terms to search for..

I am searching trying to find a solution but no luck yet...

This is on Debian 6.01 (32-bit) with Zoneminder 1.24.2

Thanks for the help!

[bb99]

Uncheck "options::config::V4L_MULTI_BUFFER"; if that doesn't fix it then change "options::config::CAPTURES_PER_FRAME" to a value of 2. The 143 is a good single chip card but I recommend a heat sink on the chip for more then one camera. I should also mention that your frame rate per camera is going to decrease significantly.

[mastertheknife]

Use the same resolution, palette, format and method for both monitors.

[elfking]

Uncheck "options::config::V4L_MULTI_BUFFER"; if that doesn't fix it then change "options::config::CAPTURES_PER_FRAME" to a value of 2. The 143 is a good single chip card but I recommend a heat sink on the chip for more then one camera. I should also mention that your frame rate per camera is going to decrease significantly.

Thank you very much looks like when I set the CAPUTRES_PER_FRAME to 2, it started behaving. The VLC_MULTI_BUFFER didn't seem to change much of anything. (I restarted zoneminder each time to check)

I hadn't heard to put a heat sync on the chip, I guess the specs/documentation is somewhat full of it considering with two camera's running now I am getting 6 or 7 FPS I thought maybe it would be able to keep up and do at least 10 with just 2 Cameras... I wasn't expecting 15 on each or anything of that sort.. but I can imagine if I add two more camera's its likely not to hold 6 FPS...

Use the same resolution, palette, format and method for both monitors.

I had tried this, it didn't seem to fix the problem running both at 640, or both at 320, so I was just changing around things to see if it made a different. But I did read somewhere that they should all be the same since its a single chip capture etc.


Thanks for the help and info!