Re: [Motion-user] latest git fails to open netcam

[S A. <san...@gm...>]

Hi Barry,

Good tip, especially since it is headless. Thanks.
Yes, RPi4b 4Gb except one with 8Gb that was intended to be desktop, 
eventually.
Running 3 cameras at 640x480x15 doesn't run the cpu very hard, one (of 
6) motion thread stays below 60% while not recording, rendering video.
Memory usage shows 133M/7.27G in htop, and motion threads show Virtual 
usage at 329M. So I didn't think altering the gpu/arm would matter and 
left it alone at 512M.

Back to the 4Gb RPi4, only 1 camera, 94.4M/3.69G and 241M, I would 
expect 3x cameras would be 3x memory, but... nope?

Stewart

Barry Martin wrote:
> If it's a Raspberry Pi 4 keep the GPU_Mem _low_ -- to me 
> counter-intuitive when have a video problem but read that over in the 
> Raspberry Pi forums.  I have an RPi 4 (4 GB version) with two USB 
> cameras and it is configured to 128 MB and I could probably go with 
> less.  Higher memory caused all sorts of issues, possibly because I 
> was 'starving' the ARM.  Appears there is 1 GB shared between the two 
> and what one uses the other can't.
>
>     pi@raspberrypi:~ $ vcgencmd get_mem gpu
>     gpu=128M
>     pi@raspberrypi:~ $ vcgencmd get_mem arm
>     arm=896M
>
>