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CHDK for longtime timelapse

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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #50 on: 29 / August / 2021, 03:52:41 »
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Quote from: dolomiti_timelapse on 28 / August / 2021, 09:24:04
I think it is not so interesting, because in the time lapse I do the clouds/sky is the most interesting part and in that video it is overexposed.

The video is definitely overexposed in many places.

That is precisely the great advantage of rawopint that you can limit the overexposure there. I go to a maximum of 1%, rather lower.

However, the measurement takes place on the RAW data and that says nothing about how big the overexposure is in the JPG.
If you want to use the full dynamics then you have to  use RAW.
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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #51 on: 29 / August / 2021, 07:28:03 »
Quote from: c_joerg on 29 / August / 2021, 03:52:41

However, the measurement takes place on the RAW data and that says nothing about how big the overexposure is in the JPG.


Yeah, that's a good point!
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Offline reyalp

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Re: CHDK for longtime timelapse
« Reply #52 on: 29 / August / 2021, 17:47:08 »
Quote from: c_joerg on 29 / August / 2021, 03:52:41
However, the measurement takes place on the RAW data and that says nothing about how big the overexposure is in the JPG.
We don't know the exact details, but as far as I remember, when rawopint successfully keeps raw exposure below the default 1/4 stop margin, the jpegs generally aren't heavily blown out.

It is possible that g1x behaves differently since it has 14 bit raw rather than the more common 12 bit.
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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #53 on: 27 / September / 2021, 16:21:26 »
I have some good news for my project :D

Finally the camera has its own window with "panorama" view. Now I can take pictures up to 24mm wide angle. (equivalent to 35mm sensor), before it was only possible up to about 50mm. Also, I can now photograph the sky much better with less light pollution and without the roof visible in the upper part of the image.
No more reflection and a clear and sharp double glass window will give me and this project a lot of joy.

Also, a servo + Arduino is now mounted on the camera (not installed in the attached picture) to turn the camera on and off when the camera crashes and I can't restart it from the PC.

Also a new power supply for the camera is installed with a new 2s lipo with a constant voltage and current limited cd-cd converter.

Now there are some new issues to solve like how to protect the camera from sunlight etc.
Originally I covered the window from the outside with black cardboard, but it was not well stuck, so I removed it again. I think I will use black tape on the glass of the window to make a sunshade and cover the parts of the window that the camera doesn't look through.

Also the video editing has to be updated to the new view...

And every 3 to 5 days the camera crashes... I'm collecting the romlogs and I'll post them here at some point in the future so someone with more experience can take a quick look over it and maybe figure something out, but for now I'm just restarting the camera with the servo.
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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #54 on: 28 / September / 2021, 02:31:29 »
Quote from: dolomiti_timelapse on 27 / September / 2021, 16:21:26
Finally the camera has its own window with "panorama" view. Now I can take pictures up to 24mm wide angle. (equivalent to 35mm sensor), before it was only possible up to about 50mm.

Unfortunately the G1x has only 28 mm :(


Quote from: dolomiti_timelapse on 27 / September / 2021, 16:21:26
No more reflection and a clear and sharp double glass window will give me and this project a lot of joy.

I also noticed that there are significantly fewer lens flares ;)

Quote from: dolomiti_timelapse on 27 / September / 2021, 16:21:26
Also, a servo + Arduino is now mounted on the camera (not installed in the attached picture) to turn the camera on and off when the camera crashes and I can't restart it from the PC.

Could you post a picture? I am very interested in that…


Quote from: dolomiti_timelapse on 27 / September / 2021, 16:21:26
Now there are some new issues to solve like how to protect the camera from sunlight etc.

In direct sun I would always turn on the built-in ND filter.

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Offline Mlapse

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Re: CHDK for longtime timelapse
« Reply #55 on: 28 / September / 2021, 06:59:04 »
Quote from: dolomiti_timelapse on 27 / September / 2021, 16:21:26
Now there are some new issues to solve like how to protect the camera from sunlight etc.
Originally I covered the window from the outside with black cardboard, but it was not well stuck, so I removed it again. I think I will use black tape on the glass of the window to make a sunshade and cover the parts of the window that the camera doesn't look through.


I have good results with just a cardboard box taped to the inside of a double glazed window.
it isn't even black and still, when it is folded closed it prevents light reflection from inside (my biggest problem) and blocks most sunlight that would hit the cam.
the reason I cut a lot of the box away is to give me easy access to the buttons of the cam,
but if you are doing everything via a computer you might not need to remove this much material.
« Last Edit: 28 / September / 2021, 10:13:20 by Mlapse »
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Offline manoweb

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Re: CHDK for longtime timelapse
« Reply #56 on: 28 / September / 2021, 22:11:32 »
HelloI'm the guy with three cameras mounted outdoors on the Cornizzolo*. These days each camera is getting close to one million pictures. The software and scripts have been pretty stable.We are considering now upgrading the cameras not because they show signs of getting old but to step up with image quality and resolution.
I cannot possibly read all this thread :) but let me know if you have further questions

* http://escursionisticivatesi.it/webcam/ long exposure night shots never get old:

« Last Edit: 29 / September / 2021, 08:07:32 by manoweb »
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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #57 on: 29 / September / 2021, 02:17:46 »
Quote from: manoweb on 28 / September / 2021, 22:11:32
HelloI'm the guy with three cameras mounted outdoors on the Cornizzolo*. These days each camera is getting close to one million pictures. The software and scripts have been pretty stable.

Which cam and which script?

Quote from: manoweb on 28 / September / 2021, 22:11:32
http://escursionisticivatesi.it/webcam/long

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Offline manoweb

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Re: CHDK for longtime timelapse
« Reply #58 on: 29 / September / 2021, 08:11:44 »
Quote from: c_joerg on 29 / September / 2021, 02:17:46
Which cam and which script?
User reyalp linked it in reply #1 on this thread:
https://chdk.setepontos.com/index.php?topic=14302.msg145505#msg145505

The link to the actual website was mangled by this forum but now I fixed it in my previous post, sorry about that:
http://escursionisticivatesi.it/webcam/
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Offline reyalp

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Re: CHDK for longtime timelapse
« Reply #59 on: 30 / September / 2021, 00:23:57 »
Discussion about cameras for other projects split to https://chdk.setepontos.com/index.php?topic=14436.0
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