Night timelapse (was Re: considerations for SX260 external power supply for time lapse situations) - page 5 - Script Writing - CHDK Forum supplierdeeply

Night timelapse (was Re: considerations for SX260 external power supply for time lapse situations)

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14.461714 was the longest exposure thus far.

May be the bug is lower than 3 steps…
As I say, I had never problems with ui_tv_max_s1k  = ui_tv_sv_adj_s1k.

This is the way how the DSLR guys doing it (first exposure time, than ISO and than aperture)
http://lrtimelapse.com/tutorial/true-holy-grail-auto-ramping/


Yes the light in the dark chamber can change wildly. (light on/off, door open/close etc)
 

For testing I use the following test video which I made:
http://www.youtube.com/watch?v=quEMCjnxhRc
You have to point your camera just to a screen and set the focus of your cam to infinity. The video simulates day to night in just 30 minutes. I know it’s boring video but it is really helpful to understand a lot of this stuff.
« Last Edit: 02 / April / 2016, 13:11:58 by c_joerg »
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd

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Offline reyalp

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Please let me know what I can to to help this fixing. (testing, logging..)
I confirmed and fixed a bug in the code. In v0.20 and below, when the max ISO was reached, the exposure time will not increased further. I'll post an updated version shortly.

However, in general, I'd suggest putting the ISO adjustment at the end of the shutter range, like c_joerg suggests. This is what expected when I wrote the script. ISO usually has more impact on quality than exposure time, so you'd normally want to use shutter-only adjustment for as long as possible. There might be exceptions if you prioritize maintaining a steady interval or capturing moving subjects over quality.

edit:
Updated script is posted in the usual location.
« Last Edit: 02 / April / 2016, 16:37:50 by reyalp »
Don't forget what the H stands for.

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Offline udo

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Updated script is posted in the usual location.
Thanks!!

The download link leads me to https://www.box.com/en_GB/front/ and does not provide a file.
Is this a box issue or a local issue?
A different box url shows the same behaviour.
A different means of distribution is a welcome workaround.
« Last Edit: 03 / April / 2016, 04:12:19 by udo »

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Offline reyalp

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The link on the wiki is https://app.box.com/s/60na934xplrnwvhr83fed6mlfqdtq5gd

You should also be able to browse the folder at https://app.box.com/s/ng15u3jhhs4b2d1bqio1y5emy1vafupc

Does that not work for you?
Don't forget what the H stands for.


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Offline udo

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Does that not work for you?
Neither works.
Tried with firefox and chrome.
Both behaved similarly.

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Offline reyalp

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Don't forget what the H stands for.


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Offline udo

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Using version 0.20 the S110 ran 20+ hours on the powerbank, taking 16K+ pictures. (less than 25K due to longer exposures)
The longest exposures were in the 15 second range.

Next, once the powerbank has been charged, will be a run with 0.21.
« Last Edit: 03 / April / 2016, 09:08:05 by udo »


The link on the wiki is https://app.box.com/s/60na934xplrnwvhr83fed6mlfqdtq5gd
You should also be able to browse the folder at https://app.box.com/s/ng15u3jhhs4b2d1bqio1y5emy1vafupc
Does that not work for you?
I don’t had problems with downloading version 0.21 …
Using version 0.20 the S110 ran 20+ hours on the powerbank, taking 16K+ pictures. (less than 25K due to longer exposures)
The longest exposures were in the 15 second range.
Next, once the powerbank has been charged, will be a run with 0.21.
Well I hope your shutter did not die … 
There is something which I notice on your runs. I have seen similar things on my G1x with one special SD Card.

Sometimes ‘sleep’ made big jumps as you can see in the plot. For me it looks like that something blocks writing to the SD card. Did you made all runs with the same SD Card?

You should observe this..
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd

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Offline udo

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There is something which I notice on your runs. I have seen similar things on my G1x with one special SD Card.

Sometimes ‘sleep’ made big jumps as you can see in the plot. For me it looks like that something blocks writing to the SD card. Did you made all runs with the same SD Card?
Yes.
I just do an `rm -rf /mnt/DCIM/*` and I can do a new run on the card.
Once the config is OK I replicate 0.21 to the other cards.

You should observe this..
What can I do to fix or investigate?

 

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