Re: [Motion-user] RTSP stream and CPU utilization

[Colin L. <cl...@gm...>]

On Fri, 23 Nov 2018 at 17:13, David Powell <da...@de...> wrote:
>
> The resolution of the MJPEG ones are all 640x480.  The RTSP one is 720p.
>
> I have framerate set to 15 in motion.conf.  The individual camera config files do not have that setting.

The MJPEG cameras are 307200 pixels, the RTSP is 921600 which is
equivalent to all the others put together.  Also the RTSP is probably
providing the data at 25 or 30 frames/sec and the processor has to
decode all of those even though you only want 15/sec in motion Mjpeg
is a sequence of individual pictures so unwanted ones can just be
thrown away.  So yes, there is a lot more processing to be done for
the RTSP camera before it even gets as far as motion.  You may be able
to slow down the frame rate in the camera, and also possibly the
resolution if you don't need it all.

>
> David
>
> On 11/23/18 10:54 AM, Colin Law wrote:
>
> On Fri, 23 Nov 2018 at 16:53, Colin Law <cl...@gm...> wrote:
>
> On Fri, 23 Nov 2018 at 16:43, David Powell <da...@de...> wrote:
>
> I have 3 IP cameras configured in Motion running on a Raspberry Pi (Ubuntu).  These cameras all use MJPEG streams and the CPU utilization on the Pi hovers around 50%.
>
> I added another camera which doesn't support MJPEG, but does support RTSP.  Adding this one RTSP camera ran the CPU utilization up to around 200% (I believe this Pi has a quad-core CPU).  Is this typical for RTSP?  Is there any way to reduce the load for this protocol?  I want to add several more cameras but cheap wireless outdoor IP cameras that support MJPEG seem to be hard to come by nowadays.
>
> What is the resolution of the mjpeg cameras and what is the rtsp one?
>
> Also what is frame rate of both?
>
> Colin
>
> David
>
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