I got my numbers using mjpeg-streamer for non-dsp and a gstreamer-ti pipeline streaming over UDP for dsp.  The mjpeg stream was using 200KB/s (1.6Mbits) for 320x240 @ 30fps , 640x480 @ 30fps h264 uses average ~150KB/s but peaks at around 500KB/s, 320x240 h264 uses average ~50KB/s and peaks around 100-150KB/s (and only 10% of CPU).

These were obtained from an overo fire FE running at the stock 500MHz.

On Thu, Mar 31, 2011 at 8:09 AM, Chris.C <chris.coulter@ntlworld.com> wrote:

Maybe to help my previous question along


Say I use the Caspa VL and set it for 30fps VGA.

>From the information in the data sheet I get Overall Pixel Rate = 3 x 752 x
480 x 30 = 35Mpixels/s (approx)
and since its 10bits/pixel we get approx 350Mbits/s. Now say I want to
transmit this wirelessly over the 802.11b/g wireless gumstix module. So I
want to compress this to say 1Mbit/s to transmit it wirelessly. Can it be
done? If so with which compression am I looking at using? Would it be
possible to keep the output at something standard like 640 x 380 @ 30fps??



Chris.C wrote:
>
> Thanks for the helpful and speedy reply! However, what if I wanted to work
> out the CPU usage from a hypothetical sense to prove that it will work
> before having someone write code etc so I can compare on paper before
> giving the go ahead?
>
> Thanks
> Chris
>
>
> vwyodapink wrote:
>>
>> http://linux.die.net/man/1/top
>>
>> Its a program you run.
>>
>> On Thu, Mar 31, 2011 at 12:40 AM, Chris.C
>> <chris.coulter@ntlworld.com>wrote:
>>
>>>
>>> top??
>>>
>>>
>>> vwyodapink wrote:
>>> >
>>> > top would give you a close idea to your usage.
>>> >
>>> >
>>> >
>>> > On Wed, Mar 30, 2011 at 8:03 PM, Chris.C <chris.coulter@ntlworld.com>
>>> > wrote:
>>> >
>>> >>
>>> >> Yes I have seen Pixhawk and in some way I want to emulate it, but my
>>> >> original
>>> >> plan was never to use this kind of camera system as any that Pixhawk
>>> used
>>> >> were third party. But now that Gumstix has its own product I would
>>> look
>>> >> into
>>> >> using it. So the Overo Air was suitable for what I had, but obviously
>>> now
>>> >> its seeming that it won't quite be enough.
>>> >>
>>> >> But can I ask, as with Steve how do you know you are maxing out at
>>> 65%
>>> >> CPU
>>> >> usage? I would be interested to see how you concluded that number.
>>> >>
>>> >> Thanks
>>> >> Chris
>>> >>
>>> >> vwyodapink wrote:
>>> >> >
>>> >> > oh and paparazzi uses overo's in the LisaL setup I believe its
>>> called.
>>> >> >
>>> >> >
>>> >> >
>>> >> > On Wed, Mar 30, 2011 at 7:17 PM, J. L. <vwyodapink@gmail.com>
>>> wrote:
>>> >> >
>>> >> >> If this is for a UAV you should check out the pixhawk site and
>>> they
>>> >> give
>>> >> >> good ideas on what you can do with the overo's. I use an overo
>>> fire
>>> on
>>> >> my
>>> >> >> UAV though dont use the caspa, but do video and many other things
>>> and
>>> >> max
>>> >> >> out roughly around 65% CPU usage clocked at 720. If you use DSP
>>> your
>>> >> >> usage
>>> >> >> drops drastically.
>>> >> >>
>>> >> >>
>>> >> >>
>>> >> >>
>>> >> >> On Wed, Mar 30, 2011 at 6:49 PM, Chris.C
>>> >> >> <chris.coulter@ntlworld.com>wrote:
>>> >> >>
>>> >> >>>
>>> >> >>> So it would be possible if its all it was to be used for, but is
>>> >> going
>>> >> >>> to
>>> >> >>> cause issues if I look to do more with the board. Can I ask how
>>> you
>>> >> >>> arrived
>>> >> >>> at the 70% and %20?
>>> >> >>>
>>> >> >>> Thanks for the massive help already.
>>> >> >>> Chris
>>> >> >>>
>>> >> >>> Steven-132 wrote:
>>> >> >>> >
>>> >> >>> > DSP allow you to do h264 compression without killing your CPU.
>>> >>  You're
>>> >> >>> > looking at 70% CPU usage for 320x240@30fps MJPG compression
>>> without
>>> >> >>> DSP
>>> >> >>> vs
>>> >> >>> > 20% CPU usage for 640x480@30fps h264 compression.
>>> >> >>> >
>>> >> >>> > On Wed, Mar 30, 2011 at 11:23 AM, Chris.C
>>> >> >>> > <chris.coulter@ntlworld.com>wrote:
>>> >> >>> >
>>> >> >>> >>
>>> >> >>> >> I have been looking into using the Caspa VL with the Gumstix
>>> Overo
>>> >> >>> Air
>>> >> >>> >> COM,
>>> >> >>> >> however I'm having some doubts. The overall final design would
>>> go
>>> >> >>> onto
>>> >> >>> a
>>> >> >>> >> UAV
>>> >> >>> >> so I need the wireless capability of either the Overo Air or
>>> one
>>> >> of
>>> >> >>> the
>>> >> >>> >> Overo Fire boards.
>>> >> >>> >>
>>> >> >>> >> The Overo Air comes with the OMAP 3503 which only comes with
>>> the
>>> >> ISP
>>> >> >>> >> interface. This would allow me to get the image from the
>>> camera
>>> >> and
>>> >> >>> >> potentially transmit it wirelessly to the ground. Correct?
>>> >> >>> >>
>>> >> >>> >> However, the Overo Fire comes with the OMAP 3530 which has the
>>> ISP
>>> >> >>> >> interface
>>> >> >>> >> (with what seems a few more features) and a DSP. And again I
>>> >> assume
>>> >> I
>>> >> >>> >> could
>>> >> >>> >> get the image and transmit it wirelessly.
>>> >> >>> >>
>>> >> >>> >> Camera systems really aren't my strong point, so I'm just
>>> >> wondering
>>> >> >>> what
>>> >> >>> >> I
>>> >> >>> >> lose or gain by sticking with the Overo Air or do I have no
>>> choice
>>> >> >>> but
>>> >> >>> to
>>> >> >>> >> use the Overo Fire as DSP is a must? Why is DSP so important
>>> if
>>> >> the
>>> >> >>> Caspa
>>> >> >>> >> camera is listed as compatible with the Overo Air?
>>> >> >>> >>
>>> >> >>> >> Thanks in advance for any replies and ideas.
>>> >> >>> >> Chris
>>> >> >>> >> --
>>> >> >>> >> View this message in context:
>>> >> >>> >>
>>> >> >>>
>>> >>
>>> http://old.nabble.com/Caspa-VL-and-Overo-Air-COM-tp31278377p31278377.html
>>> >> >>> >> Sent from the Gumstix mailing list archive at Nabble.com.
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>>
>>> >>
>>> ------------------------------------------------------------------------------
>>> >> >>> >> Create and publish websites with WebMatrix
>>> >> >>> >> Use the most popular FREE web apps or write code yourself;
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>>> >> >>> >>
>>> >> >>> >
>>> >> >>> >
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>>> >>
>>> ------------------------------------------------------------------------------
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>>> >> >>> > _______________________________________________
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>>> >> >>> > https://lists.sourceforge.net/lists/listinfo/gumstix-users
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>>> >> >>>
>>> >> >>> --
>>> >> >>> View this message in context:
>>> >> >>>
>>> >>
>>> http://old.nabble.com/Caspa-VL-and-Overo-Air-COM-tp31278377p31282672.html
>>> >> >>> Sent from the Gumstix mailing list archive at Nabble.com.
>>> >> >>>
>>> >> >>>
>>> >> >>>
>>> >> >>>
>>> >>
>>> ------------------------------------------------------------------------------
>>> >> >>> Create and publish websites with WebMatrix
>>> >> >>> Use the most popular FREE web apps or write code yourself;
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>>> >>
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>>> >> > Use the most popular FREE web apps or write code yourself;
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>>> >> > _______________________________________________
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>>> >> >
>>> >> >
>>> >> > -----
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>>> >> >
>>> >>
>>> >> --
>>> >> View this message in context:
>>> >>
>>> http://old.nabble.com/Caspa-VL-and-Overo-Air-COM-tp31278377p31282916.html
>>> >> Sent from the Gumstix mailing list archive at Nabble.com.
>>> >>
>>> >>
>>> >>
>>> >>
>>> ------------------------------------------------------------------------------
>>> >> Create and publish websites with WebMatrix
>>> >> Use the most popular FREE web apps or write code yourself;
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>>> ------------------------------------------------------------------------------
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>>> > Use the most popular FREE web apps or write code yourself;
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>>> > https://lists.sourceforge.net/lists/listinfo/gumstix-users
>>> >
>>> >
>>> > -----
>>> > Just a beginner trying to learn his way around.
>>> >
>>>
>>> --
>>> View this message in context:
>>> http://old.nabble.com/Caspa-VL-and-Overo-Air-COM-tp31278377p31283929.html
>>> Sent from the Gumstix mailing list archive at Nabble.com.
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Create and publish websites with WebMatrix
>>> Use the most popular FREE web apps or write code yourself;
>>> WebMatrix provides all the features you need to develop and
>>> publish your website. http://p.sf.net/sfu/ms-webmatrix-sf
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>>>
>>
>> ------------------------------------------------------------------------------
>> Create and publish websites with WebMatrix
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>>
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>>
>>
>> -----
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>>
>
>

--
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