[MPlayer-users] My cropping question revisited.

[Gene Heskett]

On Friday 27 September 2013 06:30:48 houghi did opine:

> On Thu, Sep 26, 2013 at 05:04:19PM -0400, Gene Heskett wrote:
> > And those formats are exactly the ones that return a black screen.
> 
> Command and output please. For all I know you are trying to watch
> /dev/null

Its pointed at /dev/video0.  And while I can ssh into the machine to obtain 
the rest, the lights are out, the door is closed, and ATM I'm getting 
around, what little I do, on crutches as I tore something in my left knee 
Tuesday, so I'm guessing it may be a week before I can resume this.
 
> So please give some details om what you are EXACTLY doing. We are
> already aware that 'It does not work.'.
> Also let us know if it is the files or really the camera that gives you
> a problem.

It will be time consuming to duplicate my setup with linuxcnc, and thats 
asking way too much of the list.  However if anyone else has one of these 
cameras, and can google for "camunits", then one might be able to get an 
idea of what I am trying to do, actually am doing in fact but the thru-put 
is measured in frames per minute with everything in the processing chain 
currently set for 640x480 RGB.

One of the problems is that I have too much camera, to get auto focus, I 
get 10x the image data I need, so cropping at the earliest stage makes 
sense to reduce the rest of the job.

Here is the home page for camunits:

<https://code.google.com/p/camunits/>

> Can you put the files on your PC and do they still produce the same
> result? Are you able to put them online, so others can try them out?

See the link above.  Then to bring it into linuxcnc as one source for video 
to display in the backtrace window, while adding some of the camera 
controls and machine controls to bring it all together on one screen is the 
job of another kit called "camunits-emc".  But asking someone to install 
the Linuxcnc iso on just any hardware handy is likely to take several 
machines just to find one suitable. Machines without a working EPP parport 
are eliminated from the try it and see list right up front.

Its working well on the atom boards, and on the BeagleBone Black, but this 
video SW probably hasn't been tried on the BeagleBone Black yet.  The ideal 
I/O cape for the BBB is still a work in progress.  This machine I'm on 
right now, a quad core phenom with 8Gb of ram, is actually a pretty poor 
machine to run LCNC on as its interrupt latency is 10x what we get from one 
of the D525MW atom boards, they stay under 5 microseconds, and can run the 
I/O loop at a 25 microsecond period, driving stepper motors at decent 
speeds easily.  A poor IRQ latency just kills a steppers performance 
because they won't get the step signal at the ideal time to maintain the 
rotational velocity.
 
> For all: Please read http://www.catb.org/esr/faqs/smart-questions.html
> For me it is extrenmely frustrating that I want to help, but get not
> enough feedback on doing so.
> 
> Sorry if I offended anybody by my tone.
> 
> houghi

No problem here Houghi, its me that tore up the knee & can't physically get 
to the machine ATM. So if you want to shove this off the back burner for a 
week, my feelings definitely won't be hurt

> >   Artist : ACDC
> >   
> >     Song : Love Hungry Man
> >    
> >    Album : Highway to Hell

I liked quite a bit of ACDC's work.

Cheers, Gene
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