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Raspberry Pi camera as a tap???


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#1 Chris Burke

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Posted 07 August 2015 - 05:18 PM

I have an XTR plus. I was thinking about adding a tap. It seems to me that the Raspberry Pi camera module might make for decent HD tap. Does anybody have any feelings towards this or against this or may be able to shed some light on the subject, how easy it might be. I want to have the camera overhauled pretty soon anyway, so I was thinking this might be a great time to add such a feature.
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#2 Sander Ferdinand

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Posted 24 October 2015 - 05:07 AM

Hey Chris,

 

I had exactly the same idea a few days ago. I also own an Aaton XTR plus, and was thinking about building a small camera inside the viewfinder somewhere.

 

As I am a software developer on Unix based platforms, I could produce the software.

 

I see 2 limitations with this idea:

  1. You can't use the camera on your shoulder as you have no available viewfinder (unless you're talking about a real video tap, not sure how those work).
  2. Focussing the lens would be difficult through the video provided by the raspberry pi.
  3. The raspberry pi will need power.

I have used the official camera module before for a commercial project and I can tell you it is sharp (1080p) and could probably get the viewfinder screen in focus. It has some macro capability, but if it is not enough, you could always hack it.

 

I could code something that uploads the video stream to an external harddrive (or remote FTP) WHILST the camera is in use.

 

Did you ever try this out?


Edited by Sander Ferdinand, 24 October 2015 - 05:21 AM.

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#3 Arthur Benoit Lambrecht

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Posted 29 October 2015 - 01:23 PM

Hey,

I love this idea, I want to try this on my Aaton LTR.

Sander, you would like to put the Raspberry pi on the viewfinder? I find that's too bad not be able to use it on shoulder.

Why not use the hole on battery side like real video tape?

 

Uploading video stream can be very a good tool!


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#4 Chris Burke

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Posted 10 November 2015 - 09:28 PM

My idea is to put a HD camera inside the Aaton, just like a video tap. I suspect if not the Raspberry Pi then another camera could do. You could use a flat panel monitor on top for viewing. On the shoulder, you would use the viewfinder as normal. This would be used just like any other video assist. Is the Raspberry Pi camera that low quality that focusing would not be accurate? I thought that it or another such camera could focus on the ground glass. 


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#5 Jay Young

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Posted 11 November 2015 - 05:53 AM

I would love to do this same thing to my CP-16R but I can't for the life of me figure out how to get the top plate off which I suspect has just been painted on.  The RasPi cameras are pretty small and should work in most situations.

 

Also, I agree - I would not want to pull focus off the monitor with a RasPi camera.


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#6 Chris Burke

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Posted 17 November 2015 - 08:00 PM

Perhaps a different camera, but since the days of SD taps costing thousands, hardware has changed a great deal. A 4 or 5 megapixel camera should do it and should not cost that much. The computer and software to make it all work is another hurdle, at least or the programing illiterate like me. Raspberry Pi, with another camera or it's own seems like the obvious choice. 


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#7 Sander Ferdinand

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Posted 24 December 2016 - 06:11 PM

Perhaps a different camera, but since the days of SD taps costing thousands, hardware has changed a great deal. A 4 or 5 megapixel camera should do it and should not cost that much. The computer and software to make it all work is another hurdle, at least or the programing illiterate like me. Raspberry Pi, with another camera or it's own seems like the obvious choice. 

Where were you planning to install this camera? Looking at this thread, you'll have 2 options (if I understand correctly); install it in the handle or at the 'normal' location (the video tap port near the battery).

And for both you'll need special optics (again, correct me if I'm wrong).


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#8 Chris Burke

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Posted 03 January 2017 - 11:34 PM

Where were you planning to install this camera? Looking at this thread, you'll have 2 options (if I understand correctly); install it in the handle or at the 'normal' location (the video tap port near the battery).

And for both you'll need special optics (again, correct me if I'm wrong).

I would put it in the normal location. The XTR I would do this to is going into Abelcine for a full once over soon, so...... I will ask them what their opinion is about my idea.


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#9 Jacek Zagaja

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Posted 27 January 2017 - 08:41 AM

Use wifi action cam with proper chip lens - cheap and easy. I'll be testing on my XTR.


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#10 Chris Burke

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Posted 09 February 2017 - 10:28 AM

how has your test been going?


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#11 Jacek Zagaja

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Posted 09 February 2017 - 10:40 AM

End of next week because I lent camera to a friend.
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#12 Chris Burke

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Posted 24 February 2017 - 07:41 AM

Please post photos if you can.
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#13 Jacek Zagaja

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Posted 24 February 2017 - 09:39 AM

Will do and publish step by step how to do it.
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#14 Jacek Zagaja

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Posted 27 February 2017 - 03:16 PM

At the moment having problem filling whole 1/3" camera sensor with screen view. Experimenting with different lenses. Aaton beam splitter is 45deg and camera hausing may conflict few milimetrs with film magazine.
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#15 Chris Burke

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Posted 01 March 2017 - 02:22 PM

Thanks for the update. Keep at it.
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#16 Jacek Zagaja

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Posted 05 March 2017 - 12:25 PM

At the moment I'm preparing my XTR for lacquering.
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