The maximum duration is set by the device, Samsung annoyingly limit third party manual exposure to 0.1s, although the next version of Open Camera will increase this for certain Samsung devices to 0.2s.
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Anonymous
Anonymous
-
2021-09-21
Hi, I was wondering if it's possible to get precise shutter speeds on the latest version (1.48.3) or would I have to revert back to say 1.43.3? I'm trying to record video of a crt arcade monitor on my Note 20 Ultra and the game runs at 57.5. Recording at 1/60 and 1/50 just isn't precise enough and 1/60 causes black flickers while 1/50 causes white flickers. Thanks in advance.
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What shutter speed were you able to select in 1.43.3 and earlier? The available speeds used to be determined by interpolating between the min and max values, so that made it very device dependent, and picked unusual values (so in other words if you could pick 1/57.5 it was probably luck for that device). But maybe the new version could do with more values.
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Anonymous
Anonymous
-
2021-09-21
I was able to get something really close 1/57.6 and it worked out pretty well but the later versions aren't able to do this since the slider rounds to whole 1/2 and 1/3 steps. Having the rounded values really helps when taking photos but has minor drawbacks when trying to record at a certain speed.
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Anonymous
Anonymous
-
2021-09-22
It would be possible to increase the duration of exposure time hugely, by taking multiple frames at maximum available exposure time and just summing the frames up into the final image.
If the individual frames are gamma compensated, then each frame that is added to the calculation time RAM image (of the final image) needs first to be normalized (that is; the gamma compensation must be calculated away so that the pixel values represents the physical count of photons). Obviously, the sum operand on gamma compensated data does not provide acceptable result. And because of the many frames that are summed up, the RAM image needs to have more bit-depth than what the individual frames have.
Finally, after all the frames are summed up into the RAM image it needs to be firstly scaled down or up (divided or multiplied by a constant) so that the maximum of R or G or B = 255, and secondly gamma compensated, and thirdly truncated to the 8-bit/color space, and fourthly the image is written to the disk. There also could be an option to write the unmodified RAM image to the disk as a *.DNG.
Doing such summing (with Photoshop on PC) is absolutely beneficial with photos from a dSLR quality camera. E.g. nighttime scene at f/22 for majestically long DOF, and microscopy for the same reason. I have never had a reason in doing it with phone camera, but it could also be beneficial, sa basically all the noise sources gets suppressed somewhat.
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Note this is sort of what the NR photo mode does, although yes there is room for future improvement (e.g., allowing more frames to be taken).
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Anonymous
Anonymous
-
2024-08-31
Hi... noticed this comment from years earlier but didn't seem to see a reply. Just wondering if it's possible to implement (or maybe it's already implemented but I couldn't see how to use it)?
My OC 1.51.1 app doesn't show this. Also OC does a max ISO (in my case) of 3200 in manual mode but it goes higher in auto mode.
"
Manual mode has both shutter speed and ISO manually specified. It would be wonderful if we could manually specify/lock shutter speed, but let ISO automatically adjust to proper exposure. Alternatively, if I could adjust the preferred shutter speed selected in auto ISO mode.. Is this a possible feature?
"
Thanks
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Anonymous
Anonymous
-
2024-09-07
My apologies, I didn't notice this comment. Thanks for the note. I believe the intent was to set the shutter manually and leave the ISO on Auto. I can see this is doable on the stock Samsung camera app (I can set the shutter and leave the ISO on Auto). If it's not doable in OC, then it is what it is.
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Anonymous
Anonymous
-
2024-09-18
Interesting note for S23 Ultra: I can dynamically adjust the ISO value (slide the bar) manually during recording with a locked shutter speed. Any possibility that this manual ISO control could be automated during recording? (which I think satisfies the older request above)
In any case, Open Camera is a great camera app. Thanks Mark for making it available :)
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Anonymous
Anonymous
-
2024-09-02
On S23 Ultra, I noticed the frame rate stayed consistent (per MediaInfo) when locking the shutter speed in the stock camera app, and also seemed that way in OC initially, but trying out OC in various environments showed that OC didn't actualIy keep a consistent frame rate despite the lock (and various values of locked ISO). Oh well.
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Anonymous
Anonymous
-
2024-09-07
After more testing, seems I can get fairly consistent fps in OC with careful control of the shutter (beyond a certain point in the shutter value, the fps can become inconsistent).
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
The maximum duration is set by the device, Samsung annoyingly limit third party manual exposure to 0.1s, although the next version of Open Camera will increase this for certain Samsung devices to 0.2s.
Hi, I was wondering if it's possible to get precise shutter speeds on the latest version (1.48.3) or would I have to revert back to say 1.43.3? I'm trying to record video of a crt arcade monitor on my Note 20 Ultra and the game runs at 57.5. Recording at 1/60 and 1/50 just isn't precise enough and 1/60 causes black flickers while 1/50 causes white flickers. Thanks in advance.
What shutter speed were you able to select in 1.43.3 and earlier? The available speeds used to be determined by interpolating between the min and max values, so that made it very device dependent, and picked unusual values (so in other words if you could pick 1/57.5 it was probably luck for that device). But maybe the new version could do with more values.
I was able to get something really close 1/57.6 and it worked out pretty well but the later versions aren't able to do this since the slider rounds to whole 1/2 and 1/3 steps. Having the rounded values really helps when taking photos but has minor drawbacks when trying to record at a certain speed.
It would be possible to increase the duration of exposure time hugely, by taking multiple frames at maximum available exposure time and just summing the frames up into the final image.
If the individual frames are gamma compensated, then each frame that is added to the calculation time RAM image (of the final image) needs first to be normalized (that is; the gamma compensation must be calculated away so that the pixel values represents the physical count of photons). Obviously, the sum operand on gamma compensated data does not provide acceptable result. And because of the many frames that are summed up, the RAM image needs to have more bit-depth than what the individual frames have.
Finally, after all the frames are summed up into the RAM image it needs to be firstly scaled down or up (divided or multiplied by a constant) so that the maximum of R or G or B = 255, and secondly gamma compensated, and thirdly truncated to the 8-bit/color space, and fourthly the image is written to the disk. There also could be an option to write the unmodified RAM image to the disk as a *.DNG.
Doing such summing (with Photoshop on PC) is absolutely beneficial with photos from a dSLR quality camera. E.g. nighttime scene at f/22 for majestically long DOF, and microscopy for the same reason. I have never had a reason in doing it with phone camera, but it could also be beneficial, sa basically all the noise sources gets suppressed somewhat.
Note this is sort of what the NR photo mode does, although yes there is room for future improvement (e.g., allowing more frames to be taken).
Hi... noticed this comment from years earlier but didn't seem to see a reply. Just wondering if it's possible to implement (or maybe it's already implemented but I couldn't see how to use it)?
My OC 1.51.1 app doesn't show this. Also OC does a max ISO (in my case) of 3200 in manual mode but it goes higher in auto mode.
"
Manual mode has both shutter speed and ISO manually specified. It would be wonderful if we could manually specify/lock shutter speed, but let ISO automatically adjust to proper exposure. Alternatively, if I could adjust the preferred shutter speed selected in auto ISO mode.. Is this a possible feature?
"
Thanks
I don't think Android supports setting these to manual separately, at least according to the docs ( https://developer.android.com/reference/android/hardware/camera2/CaptureRequest#CONTROL_AE_MODE )
My apologies, I didn't notice this comment. Thanks for the note. I believe the intent was to set the shutter manually and leave the ISO on Auto. I can see this is doable on the stock Samsung camera app (I can set the shutter and leave the ISO on Auto). If it's not doable in OC, then it is what it is.
Interesting note for S23 Ultra: I can dynamically adjust the ISO value (slide the bar) manually during recording with a locked shutter speed. Any possibility that this manual ISO control could be automated during recording? (which I think satisfies the older request above)
In any case, Open Camera is a great camera app. Thanks Mark for making it available :)
On S23 Ultra, I noticed the frame rate stayed consistent (per MediaInfo) when locking the shutter speed in the stock camera app, and also seemed that way in OC initially, but trying out OC in various environments showed that OC didn't actualIy keep a consistent frame rate despite the lock (and various values of locked ISO). Oh well.
After more testing, seems I can get fairly consistent fps in OC with careful control of the shutter (beyond a certain point in the shutter value, the fps can become inconsistent).