Re: Getting a hook from shell mode to do motion detection?

fwiw Gphoto capabilities on the S70 are like:

Gphoto on a Canon PowerShot S70

/main/actions/focuslock
/main/actions/opcode
/main/settings/datetime
/main/settings/output
/main/settings/ownername
/main/settings/capturetarget
/main/settings/capture
/main/status/serialnumber
/main/status/manufacturer
/main/status/cameramodel
/main/status/deviceversion
/main/status/vendorextension
/main/status/model
/main/status/firmwareversion
/main/status/orientation
/main/imgsettings/imagequality
/main/imgsettings/imageformat
/main/imgsettings/imagesize
/main/imgsettings/iso
/main/imgsettings/whitebalance
/main/imgsettings/photoeffect
/main/capturesettings/zoom
/main/capturesettings/assistlight
/main/capturesettings/autorotation
/main/capturesettings/selftimer
/main/capturesettings/exposurecompensation
/main/capturesettings/flashcompensation
/main/capturesettings/flashmode
/main/capturesettings/shootingmode
/main/capturesettings/aperture
/main/capturesettings/avopen
/main/capturesettings/avmax
/main/capturesettings/focusingpoint
/main/capturesettings/shutterspeed
/main/capturesettings/meteringmode
/main/capturesettings/afdistance

Exploring the numbered d*** config options (Canon S70)
(tab delimited)
d001	BeepModewriteable	menu	2 options
d002	Battery type	readonly	menu	6 options
d003	Battery Mode	readonly	menu	4 options
d005	Camera Mode	readonly	TEXT	CURRENT 32(?)
d006	Image Quality	writeable	menu	3 options
d007	Full View File Format	writeable	menu	2 options
d008	Image Size	writeable	menu	5 options
d009	Self Time	readonly	text	current is 100
d00a	Flash Mode	writeable	menu	5 options
d00b	Beep	writeable	menu	2 options
d00c	Shooting Mode	writeable	menu	4 options
d00e	Drive Mode	readonly	text	current 0
d00f	Zoom	readonly	text	current 0
d010	Metering Mode	writeable	menu	3 options
d011	AF Distance	writeable	menu	2 options
d012	Focusing Point	writeable	menu	2 options
d013	White Balance	writeable	menu	8 options
d015	AF Mode	readonly	text	current 0
d017	Contrast	writeable	menu	1 option
d018	Color Gain	writeable	menu	1 option
d019	Sharpness	writeable	menu	1 option
d01c	ISO Speed	writeable	menu	5 options
d01d	Aperture	writeable	menu	1 option current 40
d01e	Shutter Speed	writeable	menu	1 option current 112
d01f	Exposure Compensation	writeable	menu	13 options current 24
d020	Flash Compensation	writeable	menu	13 options current 24
d023	Av Open	readonly	text	current 32
d024	Av Max	readonly	text	current 56
d025	Focal Length	readonly	text	current 186
d026	Focal Length Tele	readonly	text	current 662
d027	Focal Length Wide	readonly	text	current 186
d028	Focal Length Denominator	readonly	text	current 32
d029	Capture Transfer Mode	writeable	menu	15 options current 13
d02a	Zoom	writeable	menu	15 options current 0
d02c	Size Quality Mode	readonly	menu	1 choice current null
d02d	Supported Thumb Size	readonly	text	current null
d02e	Size of Output Data from Camera	readonly	text	current 20480
d02f	Size of Input Data to Camera	readonly	text	current 5120
d030	Remote API Version	readonly	text	current 256
d031	Firmware Version	readonly	text	current 16777216
d032	Camera Model	readonly	text	current "Current: Canon PowerShot S70"
d033	Camera Owner	writeable	text	current null
d034	UNIX Time	writeable	text	(reads camera's clock)
d036	Camera Output	writeable	menu	3 options current 2
d037	Disp Av	readonly	text	current 0
d038	Av Open Apex	readonly	text	current 32
d039	Digital Zoom Magnification	readonly	text	current 3072
d03a	Ml Spot Position	readonly	text	current 0
d03b	Disp Av Max	readonly	text	current 0
d03c	Av Max Apex	readonly	text	current 56
d03d	EZoom Start Position	readonly	text	current 9
d03e	Focal Length Tele	readonly	text	current 662
d03f	EZoom Size of Tele	readonly	text	current 752
d040	Photo Effect	writeable	menu	6 options
d041	Assist Light	writeable	menu	2 options
d042	Flash Quantity Count	writeable	menu	1 option
d043	Rotation Angle	readonly	text	current 0
d044	Rotation Scene	writeable	menu	2 options
d045	Event Emulate Mode	writeable	menu	7 options
d046	DPOF Version	readonly	text	current 257
d047	Type of Slideshow	readonly	text	current 2
d048	Average Filesizes	readonly	text	current null
d049	Model ID	readonly	text	current 20447232
d04b	PTP Property 0xd04b	readonly	text	current 0


On 1/1/18, Marcus Meissner <[email protected]> wrote:
> Hi,
>
> Order of -l components is important and you need to add -lgphoto2_port, e.g.
> like:
>
>
> gcc -Wall -o pb sample-photobooth.c -L/usr/local/bin/gphoto2-2.5.15/lib
> -lgphoto2 -lgphoto2_port
>
> Ciao, Marcus
>
> On Sun, Dec 31, 2017 at 07:39:01PM -0500, Alan Corey wrote:
>> Well, I haven't had a lot of luck getting things from the
>> libgphoto2/examples dir running so I gave up.  Just recently I tried
>> copying sample-photobooth.c (and samples.h) into an empty dir and
>> compiling with a makefile that looks like
>>
>> -------------
>> pb: sample-photobooth.c
>>         gcc -Wall -o pb -lgphoto2 sample-photobooth.c \
>>   -L/usr/local/bin/gphoto2-2.5.15/lib
>>
>> # lib path is because I didn't want it to conflict with debs gphoto
>> # it's where libgphoto2.so.6.0.0  is
>> --------------
>>
>> And I get errors like:
>> upstairs# make
>> gcc -Wall -o pb -lgphoto2 sample-photobooth.c \
>>   -L/usr/local/bin/gphoto2-2.5.15/lib
>> /usr/bin/ld: /tmp/ccBGh1Jj.o: undefined reference to symbol
>> 'gp_log_add_func@@LIBGPHOTO2_5_0'
>> //usr/local/bin/gphoto2-2.5.15/lib/libgphoto2_port.so.12: error adding
>> symbols: DSO missing from command line
>> collect2: error: ld returned 1 exit status
>> Makefile:2: recipe for target 'pb' failed
>> make: *** [pb] Error 1
>>
>> I did an ldconfig on the path where the library is.  I was also
>> getting the "DSO missing from command line" error trying to build
>> preview.c.  I've never seen it on anything I wrote, trying to google
>> it wasn't very productive.
>>
>> On 12/31/17, Marcus Meissner <[email protected]> wrote:
>> > Hi,
>> >
>> > If you want to do this all with one camera you might be better of
>> > writing
>> > a program using libgphoto2, either in C or Python.
>> >
>> > FWIW, I did something similar to Tomas btw.
>> >
>> > Setup:
>> >
>> > - Cheap Webcam
>> > - Canon EOS 1000D with AC adapter.
>> > - Laptop
>> >
>> > Then I ran the "motion" tool using the webcam.
>> >
>> > The "motion" tool has hooks where it can callout to shell scripts.
>> > I wrote a simple shell script that ran gphoto2
>> > --capture-image-and-download
>> >
>> > and hooked it to the motion detection hook.
>> >
>> > It needed some checking that it does not run it twice (because
>> > if there is motion it would trigger faster than capturing)
>> > and it runs the disk full quite quickly with DSLR sized images.
>> >
>> > Ciao, Marcus
>> >
>> >
>> > On Sat, Dec 30, 2017 at 02:06:13PM -0500, Alan Corey wrote:
>> >> I've been thinking about this.  I plan to write in C, and between
>> >> system() and popen() and pipe() and etc there's probably a way to do
>> >> it.  From a console you type shell and give commands, then you can
>> >> type more commands.  But I'm not sure how a program would do that: as
>> >> a file descriptor or a pipe (or a socket) (dbus?)?  Gphoto as a
>> >> process stays running, you just need a programmatic way to communicate
>> >> with it.  The looping and branching wouldn't happen in Gphoto's shell,
>> >> that would be more like a low level server or driver.  I could of
>> >> course modify my copy of the source but I'd rather not do that.  I was
>> >> about to experiment a bit until I found my oldschool loadjpeg function
>> >> evidently doesn't work under Linux, I need to make a Turbo Jpeg
>> >> equivalent.  Or maybe I still need some dev file or header.  Wacky, it
>> >> doesn't know jpeg_CreateDecompress or what a size_t is?  I wrote it
>> >> under OpenBSD a couple years ago, it's been reasonably portable until
>> >> now.  Loading a straight uncompressed RGB binary would be optimum but
>> >> I need to decompress jpegs.  Don't know yet if I can send to stdout.
>> >>
>> >> I ran across motion last night but didn't bother to install it.  I
>> >> think it's strictly V4L so it's low quality just because the cameras
>> >> are.  I've got a 640x480 USB webcam that does V4L but I'd rather not
>> >> use it.  My motion detection scheme comes partly from a D-Link IP cam,
>> >> that also only does 640x480.  I'll probably be running this on a
>> >> Raspberry Pi, and I've got a few of those cameras, but I'd rather not
>> >> use them.
>> >>
>> >> The standard Gphoto --capture-preview or the shell equivalent gets me
>> >> a 320x240 jpeg which, if I decompress and compare in C, not something
>> >> awful like Python, should be fast enough.  I'd rather not use 2
>> >> cameras.  I'm from the Nikon camp, new to Canons for this project.
>> >> For $20 used I got a 7 MP camera that not only works with Gphoto but
>> >> also shoots RAW, most low-end Nikons won't do either.  I'm not
>> >> sticking my D5200 DSLR in a birdfeeder.
>> >>
>> >> Shell mode is good for this because there's only 1 start-up time, the
>> >> delay between pictures can be much lower than if you call Gphoto in a
>> >> loop to start from scratch each time.  1 frame per second might be
>> >> adequate but I'm aiming at 10.  CPU time on a Pi 3 comes cheap since
>> >> it runs on a watt or two.  So I don't need to compare 320x240 images
>> >> but if I can do it efficiently I can live with it.
>> >>
>> >> On 12/30/17, Tomas Alonso <[email protected]> wrote:
>> >> > El Viernes, 29 de diciembre de 2017 17:39:08 Alan Corey escribió:
>> >> >> I want to set up a wildlife camera, so I've read a few articles
>> >> >> about
>> >> >> it.  I've been practicing with an old Canon PowerShot S70 and it
>> >> >> seems
>> >> >> suitable.  What I'd like to try to do is use the preview images for
>> >> >> motion detection.  I need to mask out some areas to avoid false
>> >> >> activations from clouds passing over, that sort of stuff, and
>> >> >> probably
>> >> >> some averaging to account for the sun rising and setting.
>> >> >>
>> >> >> For speed it seems advisable to work in Gphoto2's shell mode but
>> >> >> I'm
>> >> >> trying to figure out a way to provide input from an external
>> >> >> program.
>> >> >> I want to do capture-preview in a loop: get a preview, run my
>> >> >> compare
>> >> >> program, get another preview.  If the compare sees something go
>> >> >> into
>> >> >> another loop grabbing big images for some amount of time, then back
>> >> >> to
>> >> >> previews.
>> >> >>
>> >> >> I did help in shell mode but I don't see anything listed that looks
>> >> >> like it would work, like being able to detect the presence of some
>> >> >> file I could use a a semaphore.  There aren't any branch (or loop)
>> >> >> instructions either.
>> >> >>
>> >> >>   Alan
>> >> >
>> >> > Hello Alan,
>> >> >
>> >> > For other needs related to security I'm also interested in doing
>> >> > something
>> >> > equivalent. I thought my first try would be
>> >> >
>> >> > http://www.chriswpage.com/2009/05/setup-an-advanced-webcam-security-system-with-ubuntu-8-04-and-motion/
>> >> >
>> >> > using the motion program under Linux. It allows to launch scripts
>> >> > when
>> >> > motion
>> >> > is detected, but you need a webcam for motion detection and a camera
>> >> > for
>> >> > good
>> >> > quality shots. That's (and the fact I own a Canon 40D) why I'm not
>> >> > sure
>> >> > at
>> >> > all
>> >> > about the webcam approach.
>> >> >
>> >> > I have high programming skills and experience with gphoto so to
>> >> > implement
>> >> > this
>> >> > myself will not be a problem. If you can't find a solution for your
>> >> > case
>> >> > just
>> >> > send me the exact gphoto commands you use for your camera to enter
>> >> > shell
>> >> > mode,
>> >> > take a preview, and take also a big image in auto mode or whatever
>> >> > you
>> >> > use
>> >> > (including the file names generated in your computer after executing
>> >> > those
>> >> > commands).
>> >> >
>> >> > Can't promise to do it for a given date but likely it will take few
>> >> > weeks.
>> >> >
>> >> > Regards,
>> >> > Tomas.
>> >> >
>> >> >
>> >> > ------------------------------------------------------------------------------
>> >> > Check out the vibrant tech community on one of the world's most
>> >> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>> >> > _______________________________________________
>> >> > Gphoto-user mailing list
>> >> > [email protected]
>> >> > https://lists.sourceforge.net/lists/listinfo/gphoto-user
>> >> >
>> >>
>> >>
>> >> --
>> >> -------------
>> >> No, I won't  call it "climate change", do you have a "reality problem"?
>> >> -
>> >> AB1JX
>> >> Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach
>> >>
>> >> ------------------------------------------------------------------------------
>> >> Check out the vibrant tech community on one of the world's most
>> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>> >> _______________________________________________
>> >> Gphoto-user mailing list
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>> >
>>
>>
>> --
>> -------------
>> No, I won't  call it "climate change", do you have a "reality problem"? -
>> AB1JX
>> Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach
>


-- 
-------------
No, I won't  call it "climate change", do you have a "reality problem"? - AB1JX
Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach

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