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Osmo Pocket Color Flicker in Videos
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doxidox
lvl.1
Austria
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Hi, we were shooting in a gym lately an using the osmo pocket as a B-cam. In a lot of the video files we noticed a weird color flicker, probably being generated by the white balance of the camera. See an example here:


Allthough we had the camera in manual white balance the camera seemed to try to adapt the magenta levels in the blacks to the changing scenery in a very flickery way. Im pretty sure this can be fixed by a software update, but it still ruined ~50% of our shots on the Osmo pocket, which is absolutely annoying.


best regards
2-5 14:34
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DJI Natalia
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Hi there, thank you for sharing this video with us. Regarding your concern, have you tried to shoot in a different environment so we can check? Thanks.
2-5 14:37
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doxidox
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Austria
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If it is any help, we were shooting in D-Cinelike Color Mode
2-5 14:38
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DJI Natalia
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doxidox Posted at 2-5 14:38
If it is any help, we were shooting in D-Cinelike Color Mode

Hi, would it be possible if you could provide other videos with different enviroment? Since the video above is against the Light environment. Please keep us posted for further help. Thank you.
2-6 11:12
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doxidox
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Austria
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DJI Natalia Posted at 2-6 11:12
Hi, would it be possible if you could provide other videos with different enviroment? Since the video above is against the Light environment. Please keep us posted for further help. Thank you.

Hi, here is a compilation of other shots that have the same problem. It seems to be triggered with a change in lighting, but not all the time. As you can see, there are also shots where the lighting stays the same and the flicker still occurs. This time I used the raw footage, no color correction applied.



Unfortunately I don't have shots in completely different environments showing the problem. I guess you can imagine I am not a full-time product tester for DJI, so these samples have to suffice. Also, shooting against the light CAN NOT be a problem for any modern camera, since this type of scenario happens all the time.
2-6 12:10
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The Eastcore
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Canada
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I've also seen the same flicker ruin most of my Osmo Pocket shots since the last firmware update. Here's a shot I did just now in my kitchen, with only natural light, all lights off in the house:

2-6 12:22
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Arc Light
lvl.4
Canada
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Looking at your examples it's tough to pinpoint the problem with all the movement. I assume your not shooting in auto iris?  The other thing I see is most of your shots with problems you are shooting toward bright windows, could the colour shifts your seeing be caused by lens flares?
2-6 13:17
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doxidox
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Austria
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Arc Light Posted at 2-6 13:17
Looking at your examples it's tough to pinpoint the problem with all the movement. I assume your not shooting in auto iris?  The other thing I see is most of your shots with problems you are shooting toward bright windows, could the colour shifts your seeing be caused by lens flares?

It is definitely not a problem with flares. Eastcores example demonstrates it perfectly, just look at the end where he doesn't even point the camera at the window, but at his cat.
2-6 13:22
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The Eastcore
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Canada
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I think this has to do with changes in iso sensitivity when in Auto exposure.  It does not happen in manual exposure, and I'm pretty sure what we're seeing is the change in black level as the iso changes. this is why it's more prevalent in D-cine mode.
2-6 13:36
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djiuser_36CdOEQUehX4
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Austria
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The Eastcore Posted at 2-6 13:36
I think this has to do with changes in iso sensitivity when in Auto exposure.  It does not happen in manual exposure, and I'm pretty sure what we're seeing is the change in black level as the iso changes. this is why it's more prevalent in D-cine mode.

I agree. Are you familiar with vectorscope and waveform? If you analyse the raw video you should see a change in color or luminance.
2-6 14:07
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WOLF Eagle
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djiuser_36CdOEQUehX4 Posted at 2-6 14:07
I agree. Are you familiar with vectorscope and waveform? If you analyse the raw video you should see a change in color or luminance.

I made a test  and saw the same flickering on a grey wall.  You notice the flickering in the histogram(RGB). It shows a  horizontal bump in the shadows for a few milliseconds (shadows get flat (vertical) and stretched(horizontal)). So it's not a white balance issue but the contrast is changing because of changes in iso sensitivity.
2-7 06:00
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The Eastcore
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Canada
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djiuser_36CdOEQUehX4 Posted at 2-6 14:07
I agree. Are you familiar with vectorscope and waveform? If you analyse the raw video you should see a change in color or luminance.

After a quick analysis of the issue, I am pretty confident it's as simple as DJI botched the internal readout mapping with the D-Cine format at certain ISO's. It's not as simple as a black-level cutoff, as the tint/cast shows well into mid grey levels. This really sucks, because it makes things very difficult for us to correct. On the other hand, it should be a very easy fix for DJI to implement in a future firmware.

DJI NEEDS TO FIX THIS.
2-7 06:06
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The Eastcore
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Canada
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The Eastcore Posted at 2-7 06:06
After a quick analysis of the issue, I am pretty confident it's as simple as DJI botched the internal readout mapping with the D-Cine format at certain ISO's. It's not as simple as a black-level cutoff, as the tint/cast shows well into mid grey levels. This really sucks, because it makes things very difficult for us to correct. On the other hand, it should be a very easy fix for DJI to implement in a future firmware.
[view_image]
DJI NEEDS TO FIX THIS.

GIF file didn't work in the last post. Here:
2-7 06:11
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WOLF Eagle
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Austria
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The Eastcore Posted at 2-7 06:11
GIF file didn't work in the last post. Here:
[view_image]

Thank you for analyzing the issue. I hope they will fix it asap.
2-7 09:13
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The Eastcore
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Canada
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The Eastcore Posted at 2-7 06:11
GIF file didn't work in the last post. Here:
[view_image]

Update:
After more testing, I can confirm a couple of things:

First, this appears to be something wrong with iso 3200 on the Osmo Pocket. I've run through the iso range, and though they are pretty consistent, once you jump to iso 3200, the "pink cast" takes over. When set to Auto, we will see this change in colour and contrast anytime the camera jump to 3200.

Second, this DOES happen in both D-Cine and Standard colour modes. It's just not as noticeable in standard colour due to the crushed blacks and contrast.

So, hopefully DJI can remap their sensor readout for iso3200 to match the rest of the range in a FW update.
2-8 09:58
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Arc Light
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Canada
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Excellent job analyzing the problem!  Let's hope DJI sees this and are able to implement a future firmware fix.
2-8 15:23
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kazcow
Second Officer
Flight distance : 34190 ft
United Kingdom
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mine does the same - very annoying flicker in low light.
2-9 03:49
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edeone
Second Officer
Flight distance : 164685 ft
Germany
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The Eastcore Posted at 2-7 06:11
GIF file didn't work in the last post. Here:
[view_image]

this problem is called "intra frame flicker"
2-11 00:19
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Sircoynie
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Flight distance : 170676 ft
United Kingdom
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I have just noticed this on my day old Osmo Pocket, is there a fix/do we know if DJI are looking to fix? Thanks
3-12 14:06
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davidvek
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Italy
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in manual or auto esposition
3-17 09:47
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davidvek
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Italy
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doxidox Posted at 2-6 12:10
Hi, here is a compilation of other shots that have the same problem. It seems to be triggered with a change in lighting, but not all the time. As you can see, there are also shots where the lighting stays the same and the flicker still occurs. This time I used the raw footage, no color correction applied.

https://vimeo.com/315736521/f542b44ee7

also to me it makes the same problem, it is the cinelike, if you remove it does not do it anymore, or you have to lower the times and use the iso manually, sorry my english
3-17 09:52
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djiuser_qcRHjOgnSLeL
New

Singapore
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I have the same problem, this is very annoying!!!
3-21 13:31
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Satureyes
Second Officer
Flight distance : 212736 ft
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United Kingdom
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Same here. Perhaps the only comfort until this is fixed is that it's not likely a hardware issue seeing as though so many of us have the issue.

Pretty sure it's since the last Firmware too. Never noticed it before.
4-7 09:07
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Jakab Gipsz
First Officer

Hungary
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djiuser_qcRHjOgnSLeL Posted at 3-21 13:31
I have the same problem, this is very annoying!!!

I also noticed on indoor recording ...
4-7 14:13
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DJDream
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Israel
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I have this issue as well but I thing that I had it too also before the new firmware.
4-7 14:34
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SuperBura
lvl.1
Russia
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The same on the new Osmo Pocket (production date April 2019) with the latest firmware update. The problem is really annoying and interferes with post-production. DJI should pay attention to this and fix it!
5-25 12:29
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djiman84
lvl.1
United States
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Hey,

Has anyone found a solution to this yet or something that can reduce the effect? I bought an Osmo pocket a few days before my family trip to Florida for the purpose of capturing family memories. I'm now in Florida as we speak and I have footage that is close to being unusable and it's rather upsetting.

I've been using the PolarPro ND filters but i assume these don't have an effect on what i'm seeing (change in colour between what i would consider normal and a pink tone). It doesn't fade between these either and is rather more a flicker between which is very off putting. It would be more acceptable if the change in tone wasn't so instant making it so obvious.

Anything anyone can advise, i'm all ears.

Currently using:
- 4K 16:9 60fps
- Pro mode using D-Clike Colour, auto WB, Manual exposure 1/120 shutter and auto ISO
- ND16 filter (i have also used ND16/PL and ND32/PL

Thanks.
6-11 13:54
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DJI Mindy
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Flight distance : 7 ft
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Hi all, sorry for the troubles with the footage, could you please export short original footage from the SD card and upload to Dropbox or Google Drive and then post the link here so that we can download for further analysis? Besides, we also need the log from SD card.
Please open the hidden file and then find the log under: MISC/LOG/camera_log.log+gimbal_log.log
6-12 20:07
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djiman84
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United States
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Hi Mindy,

Just before i post, i assume there is no personally identifiable information within the log files?

Thanks.
6-14 19:47
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djiman84
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United States
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Can you also confirm that the logs don't include any thumbnails encoded within?

Thanks.
6-14 20:08
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djiman84
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United States
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Hi Mindy,

Once you confirm the questions on logs i will post those to you, in the meantime please see example video:

https://drive.google.com/file/d/1Z5NlTM61Z2mEksEvx1rcsMSclc-PUHdN/view?usp=sharing

Look from at 27 seconds in.

Thanks
6-16 08:42
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DJI Mindy
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djiman84 Posted at 6-16 08:42
Hi Mindy,

Once you confirm the questions on logs i will post those to you, in the meantime please see example video:

Sorry for the late response, please reply to one of my posts directly so I can get the notification and reply timely.
About the SD logs, I will verify with our engineers and come back to you soon.
6-21 03:35
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AdrianGMan
lvl.1
Flight distance : 250190 ft
United States
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Mine does the same. I realized it was the auto ISO. Once you get towards darker areas the higher ISOs the osmo pocket has a hard time figuring out what ISO to chose so it goes back and forth trying to choose one. I heavily recommend to use manual ISO to avoid this but it is not practical in all situations.
6-22 17:25
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djiman84
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United Kingdom
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DJI Mindy Posted at 6-21 03:35
Sorry for the late response, please reply to one of my posts directly so I can get the notification and reply timely.
About the SD logs, I will verify with our engineers and come back to you soon.

Thanks, i have an RMA setup to return the device, but want to know if this is an issue with all devices regardless and sending back will be a waste of time. It is fine when setting a manual ISO but that's not great for filming moving shots of the family between different lighting settings.

Any input you can give would be greatly appreciated.
6-23 13:32
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leeviz
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Flight distance : 39446 ft
United States
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Hello,
I've also experienced this in an indoor shooting with auto ISO. (48fps, manual white balance, d-cinelike). Funny thing is that I've shot in a darker indoor with auto ISO but I never saw flickering color like this. Is this a new bug?
6-27 00:05
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gyliao
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DJI Mindy Posted at 6-12 20:07
Hi all, sorry for the troubles with the footage, could you please export short original footage from the SD card and upload to Dropbox or Google Drive and then post the link here so that we can download for further analysis? Besides, we also need the log from SD card.
Please open the hidden file and then find the log under: MISC/LOG/camera_log.log+gimbal_log.log

Have the same issue here, here is video and log
https://www.dropbox.com/sh/0w4n0npexix83zr/AAAwk0PU1lOfjMb6W9-uHAgba?dl=0

Hope it can be solved.

6-28 15:38
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DJI Mindy
Administrator
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gyliao Posted at 6-28 15:38
Have the same issue here, here is video and log
https://www.dropbox.com/sh/0w4n0npexix83zr/AAAwk0PU1lOfjMb6W9-uHAgba?dl=0

Thanks for the original footage, our engineers are working on locating the problem, if there is any update, I will keep you posted.
7-2 05:17
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hedac
Second Officer
Spain
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I hope it can be fixed too. I've also noticed this problem. I need to do some more tests... maybe it is the auto while balance? I'll try wit and without auto while balance.
7-2 08:33
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leeviz
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Flight distance : 39446 ft
United States
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https://www.dropbox.com/s/o3vf81ul4t54pk5/OsmoFlicker.mov?dl=0

I don't think it only happens in low light situation. I see it in footage shot outdoors. Sky was overcast but not dark environment. Please DJI fix this issue.  
7-3 01:39
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The Eastcore
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Canada
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Everyone here looking for a solution; Shoot manual ISO. Make sure your Osmo doesn't hit iso 3200 and you will avoid the flicker all together. Since I've switched to using manual exposure I have not seen this happen at all.
7-4 05:24
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