Powershot N Porting Thread - page 18 - DryOS Development - CHDK Forum

Powershot N Porting Thread

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Re: Powershot N Porting Thread
« Reply #170 on: 26 / September / 2014, 15:16:33 »
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I think I can take it from here.  The limited testing I was able to do did not show any video quality file size difference.
« Last Edit: 26 / September / 2014, 15:23:19 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Powershot N Porting Thread
« Reply #171 on: 26 / September / 2014, 21:52:19 »
I think I can take it from here.  The limited testing I was able to do did not show any video quality file size difference.

Thanks! I'm always impressed at how quickly good things happen in CHDK land....

It would be great to control video exposure and compression too. That said, the exposure is apparently fixed when high-speed video recording starts, so recovering correctly-scaled linear pixel data (which is what we want in our application) from the compressed video isn't as hard as it sounds. I had some suggestions from one of the Magic Lantern developers about how the video control registers might be organized, so I and my students also might be looking into having a wider selection of video framerates and resolutions, but that's not our top priority and we don't yet know details of how the high-speed video works. All the other PowerShots I've used with CHDK didn't support slow motion video, and I never really looked at the CHDK video support....

Re: Powershot N Porting Thread
« Reply #172 on: 26 / September / 2014, 23:05:26 »
Nafraf's / srsa_4c's patch tested okay.  I made the same change for the Powershot N Facebook Edition and posted both for inclusion in the autobuild.

It would be great to control video exposure and compression too.
I didn't do any more video testing because prior to applying the patch I also saw card corruption when using miniature mode so I thought it important to get the fix into the autobuild ASAP.  I'll take a look later on to see if nafraf's prediction that this does not really work comes true.

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That said, the exposure is apparently fixed when high-speed video recording starts, so recovering correctly-scaled linear pixel data (which is what we want in our application) from the compressed video isn't as hard as it sounds.
Seems to lock focus too.

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I had some suggestions from one of the Magic Lantern developers about how the video control registers might be organized, so I and my students also might be looking into having a wider selection of video framerates and resolutions, but that's not our top priority and we don't yet know details of how the high-speed video works.
If & when I get a few minutes, I might experiment with removing the recording time limit in these "slo-mo" modes.  Other than that I have little interest in video - any improvements you come up with will be most welcome to the user base.

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All the other PowerShots I've used with CHDK didn't support slow motion video, and I never really looked at the CHDK video support....
It's script level stuff, but this might be of interest too : http://chdk.setepontos.com/index.php?topic=11897.0
« Last Edit: 26 / September / 2014, 23:08:55 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Powershot N Porting Thread
« Reply #173 on: 26 / February / 2015, 14:57:49 »
Hi,

Sorry for the newbie question. I have a setup where I control a S110 camera connected to an Odroid using chdkptp. I use the 'remoteshoot' command in continuous mode. Will the Powershoot N fit such a setup? i.e. will it possible to control it using chdkptp and will it support 'remoteshoot -cont'?

Thanks in advance,
Amit


Re: Powershot N Porting Thread
« Reply #174 on: 07 / March / 2015, 20:37:01 »
Will the Powershoot N fit such a setup? i.e. will it possible to control it using chdkptp and will it support 'remoteshoot -cont'?
Sorry for the delayed response - I've been away.  The answer to your question is "Yes". 

With my N set to continuous mode in the Canon GUI,  I've tested on my Powershot N using :

Code: [Select]
run -i
___> list
-1:Canon PowerShot N b=001 d=006 v=0x4a9 p=0x325e s=xxxxxxxxxxxxxxxxxxxxxxxxxxx
___> c
connected: Canon PowerShot N, max packet size 512
con>rec
con 1> rs -cont=10

and the camera takes 10 continuous pictures and stores them on my PC hard drive without a local copy on the camera.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Powershot N Porting Thread
« Reply #175 on: 04 / June / 2015, 14:10:43 »
I have managed to successfully load 1.3 onto the camera via firmware update. My whole reasoning behind trying to load CHDK are the following:

1) External power supply (Battery Pack) for extended video play but plugging the camera in automatically loads playback mode. I have been trying to read the forums to see if this is something in development? (trick camera into recording while being plugged in)

2) Extended video recording times. I managed to find a few scripts where it automatically continues recording a new video file which is good enough for me for now. (I can't for the life of me find those scripts again!!!)

Thanks for all your work guys!!
Joe

Re: Powershot N Porting Thread
« Reply #176 on: 04 / June / 2015, 16:56:52 »
1) External power supply (Battery Pack) for extended video play but plugging the camera in automatically loads playback mode. I have been trying to read the forums to see if this is something in development? (trick camera into recording while being plugged in)
I assume you mean being able to power the camera over the USB connection (which is how the battery charging for this camera works)?  I did some work on this a few months ago as I was looking for a way to wake the camera up and start CHDK when the USB port connects.   I made a little progress but dropped it when other things took priority.

Your other choice would be an external battery pack connected via a "dummy" battery in the camera's battery compartment.

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2) Extended video recording times. I managed to find a few scripts where it automatically continues recording a new video file which is good enough for me for now. (I can't for the life of me find those scripts again!!!)
Another thing on my lower priority "round-tuit" list is to add this to the port for the N. 

In the meantime, there is this : Continuous_Video_Scripts
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline jefike

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Re: Powershot N Porting Thread
« Reply #177 on: 28 / August / 2015, 12:40:20 »
Hello,

I'm currently using four of these cameras and will be attempting to sync them up such that they are shooting high-speed video with up to a 1/960th of a second delay between them. My questions are:

1.) Has any progress has been made with the "sync" option in the CHDK menu such that it would sync all four cameras (last I checked, this didn't work with the high speed video).

2.) Has any progress has been made such that the WiFi capabilities of this camera could be utilized to that end?

Thank you.


Re: Powershot N Porting Thread
« Reply #178 on: 28 / August / 2015, 14:11:19 »
There has really not been any work for video sync in CHDK.   The break through video sync work done here last year was adopted by SDM, although I'm not sure if it will work for more than two cameras.  Also, AFAIK the Powershot N is not supported by SDM.

There has also been no work on Powershot wifi although I believed reyalp did a little exploring into what is embedded in the firmware.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Powershot N Porting Thread
« Reply #179 on: 03 / November / 2015, 22:34:30 »
I was wondering  if it is possible to initiate chdk on the N without using the lcd screen.

This would be very interesting as I would try to remove the lcd to lighten the N. If this worked, I think it would make the N the cheapest & lightest chdk camera that can shoot 2.3 continuous  :)

 

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