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

[Harlan D. <hda...@gm...>]

The mediainfo command can be very helpful when setting the quality of
videos.

On Fri, Nov 23, 2018 at 12:27 PM Colin Law <cl...@gm...> wrote:

> 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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