When shooting view from the moving car and the perspective changes from close to far distance, high value of noticeable artifact like compression or noise coming up for sometime, and after second it is gone. What is that might be and how to avoid it? Manual constant exposure and focus. Footage directly from camera. VLC player and Davinci Resolve gives the same result.
Different shooting modes tested.

4K 60fps
Single focus
Mode Pro
Exposure Manual
ISO 50
Shutter Speed 1/800
Color Normal 10bit
Video compression HEVC
Latest Firmware Version updated

Hi there. As you have mention you were in a moving car, the camera tries to focus back and forth rapidly on different subjects, this will result in Focus Jitter. I will provide you with some troubleshooting steps to help solve your issue.
1. Ensure that the shooting environment is sufficiently bright and contains features that can be focused on.

2. Ensure a sufficient focusing distance from the objecting being recorded.

3. Confirm that there is no film on the lens.

Please also try to take a video in a different location and see if you are still having the same issue. If the issue persists, please don't hesitate to reach out to us for assistance.

DJI Natalia Posted at 6-1 13:26
Hi there. As you have mention you were in a moving car, the camera tries to focus back and forth rapidly on different subjects, this will result in Focus Jitter. I will provide you with some troubleshooting steps to help solve your issue.
1. Ensure that the shooting environment is sufficiently bright and contains features that can be focused on.

Hello Natalia,
As I was describing above, the focus was single, therefore I am talking about of no any kind of focus jitter, but "noticeable artifact like compression or noise", please look at the video carefully. That is has nothing to do with the focus, but with the bitrate drop of some sort or another defect. Please read mod and exposure, as it is manual. So no any fluctuations of exposure from my side eather, it is a camera problem, Never had anything similar on the Dji Action 1 or 4 cameras.

Your shutter speed is still to low to capture that detail from a moving car, but even then you are asking to much for a lossy codec to capture that detail.

increase shutter speed maybe?

DJI-Osmo-User-1 Posted at 6-2 01:38
Your shutter speed is still to low to capture that detail from a moving car, but even then you are asking to much for a lossy codec to capture that detail.

I'll try h.264, just like Osmo Action, and look what happened, Osmo Action do not have that problem.

NotAgain Posted at 6-1 14:50
Hello Natalia,
As I was describing above, the focus was single, therefore I am talking about of no any kind of focus jitter, but "noticeable artifact like compression or noise", please look at the video carefully. That is has nothing to do with the focus, but with the bitrate drop of some sort or another defect. Please read mod and exposure, as it is manual. So no any fluctuations of exposure from my side eather, it is a camera problem, Never had anything similar on the Dji Action 1 or 4 cameras.

Hi there,
thank you for reaching out.

Kindly be advised to send the original video from the SD card directly instead this one that has been edited.

Looking forward to your response, thank you!

DJI Natalia Posted at 6-4 02:13
Hi there,
thank you for reaching out.

Hello Natalia,
I am posting original videos parts, 100% 4k footage. No editing at all, no exposure recovering, no color correction, no noise removing. Please pay attention to the left middle side of the screen on the footage, when perspective change from "close" to "far", and you will see the quality reduction looks like bitrate drop. Focus and exposure are constant manual.
I include the link to the dropbox as well, as youtube converting might be not suitable for analyzing the problem.

You can download this video at this link:

https://www.dropbox.com/scl/fi/abyxsov4vxu5uoj0ayaez/BatterflyRout_V1-0021.mp4?rlkey=2dn2mspdacbzi7m6hz1igkd7u&st=axohq8mf&dl=0

The file name: BatterflyRout_V1-0021
File Size: 443Mg

Regards.

NotAgain Posted at 6-14 20:40
Hello Natalia,
I am posting original videos parts, 100% 4k footage. No editing at all, no exposure recovering, no color correction, no noise removing. Please pay attention to the left middle side of the screen on the footage, when perspective change from "close" to "far", and you will see the quality reduction looks like bitrate drop. Focus and exposure are constant manual.
I include the link to the dropbox as well, as youtube converting might be not suitable for analyzing the problem.

Hi there,
thank you for reaching out and for sharing the video.

We will check with the relevant team on this matter and provide an answer once we have the result.

We appreciate your understanding and patience, thank you!

Hi, your expecting far to much from the compressed codec and a very complex scene (to compress) you would require an uncompressed codec (RAW or ProRes) with much higher bitrates to see no compression artefacts Leaves and rippling water are very hard to capture properly. Have you ever noticed watching a movie on say Netflix at an Ocean scene or river where the picture breaks up for a sec? It the variable bitrate codec not able to compress the scene with motion estimation..

DJI-Osmo-User-1 Posted at 6-15 00:39
Hi, your expecting far to much from the compressed codec and a very complex scene (to compress) you would require an uncompressed codec (RAW or ProRes) with much higher bitrates to see no compression artefacts Leaves and rippling water are very hard to capture properly. Have you ever noticed watching a movie on say Netflix at an Ocean scene or river where the picture breaks up for a sec? It the variable bitrate codec not able to compress the scene with motion estimation..

I understand exactly what you are saying. Then there is a question, I have never notice same problem from Action 1 and 4. So what is the difference?

The few variables for the action 4 would be shutter speed and scene or camera movements or of course available light on the scene coupled with a wider field of view.

DJI-Osmo-User-1 Posted at 6-16 03:16
The few variables for the action 4 would be shutter speed and scene or camera movements or of course available light on the scene coupled with a wider field of view.

I shoot road views and plates from the fast moving car for a very long time to say that DJI pocket is not handling it well, no matter the specs it has or shutter speed and lightning condition. No camera ever fail that way in my experience. Even cheep $100 action camera like AKASO V50X Native 4K30fps do better. I own two. Even those cameras doing better job in consistency of footage without any bitrate drops or anything.

By the way in slow moving boat at 4-5km/h similar complex footage with DJI pocket is perfect. This footage defects occurs only at speedy ride.

DJI-Osmo-User-1 Posted at 6-16 03:16
The few variables for the action 4 would be shutter speed and scene or camera movements or of course available light on the scene coupled with a wider field of view.

Anyway next week we are going on 14 days trip to wilderness, it will be a lot of off roading and lakes, so I will extensively test DJI pocket with different codecs, options and conditions, it will be backed up with tow other  action cameras anyway.

I am absolutely want Pocket to work, because I love the gimble function and design of it. I always wanted it, and waited for one inch sensor and bigger screen. It is exactly what I get.

NotAgain Posted at 6-16 11:46
Anyway next week we are going on 14 days trip to wilderness, it will be a lot of off roading and lakes, so I will extensively test DJI pocket with different codecs, options and conditions, it will be backed up with tow other  action cameras anyway.

I am absolutely want Pocket to work, because I love the gimble function and design of it. I always wanted it, and waited for one inch sensor and bigger screen. It is exactly what I get.

Hi there,
we apologize for the delay.

To address your previous concern, could you confirm if the issue is still occurring? We need to obtain the original video file for further examination. Please export the video file directly from your SD card and resend it to us. We recommend that you do not rename or modify the file.

Looking forward to your response. Thank you.

DJI Natalia Posted at 7-5 00:00
Hi there,
we apologize for the delay.

Hello Dji Natalia,
I will definitely update you tomorrow about the samples. Would it be ok if I upload original files to the Dropbox?
Spoiler, H.264 codec even worst then H.265 10bit(specifically from the driving car), that is surprise me a lot.
I will put issue description with each link to the Dropbox later.

Regards,
Vitali.

NotAgain Posted at 7-5 12:21
Hello Dji Natalia,
I will definitely update you tomorrow about the samples. Would it be ok if I upload original files to the Dropbox?
Spoiler, H.264 codec even worst then H.265 10bit(specifically from the driving car), that is surprise me a lot.

Hi there. Yes, you can upload the files and send us the link here. Thank you.

DJI Natalia Posted at 7-5 15:31
Hi there. Yes, you can upload the files and send us the link here. Thank you.

Hello Dji Natalia,
All links are downloadable originals. All footage is 60fps H.264 8bit, pro mode, over 100 bitrate.

Link 1: Starts from 15 seconds to the end. Sky getting random squariy artifacts of very low bit rate look, high level of banding, and phantom shadows from objects such as wires.

https://www.dropbox.com/scl/fi/bqzoetl4na0motd1ljzyb/DJI_20240624141256_0008_D.MP4?rlkey=auad4jt896ha8sc5dkoqs58a5&st=ba6qg0er&dl=0

Link 2: Left bottom corner of the grass in the shadow, visible to the eye exposure flickering along with squariy artifacts of very low bit rate look, basically image falling apart.

https://www.dropbox.com/scl/fi/9vra24idiku5ksl1evoev/DJI_20240625103806_0069_D.MP4?rlkey=qszh2himazhz79yxxo3iwxzgt&st=xowwn12l&dl=0

Link 3: While the footage subject is very still, no speeding car or fast movement, the camera can't handle the sky at all. Again squariy artifacts of very low bit rate look.

https://www.dropbox.com/scl/fi/5ej17xaohmxhs1jhuwg91/DJI_20240627110642_0113_D.MP4?rlkey=xh9w3zjnyj36gci1s666agel2&st=nk1r04ne&dl=0

While I have been shooting a lot of H.264 8bit footage of 100bitrate in the past, I have never experiences such image, would it be low or high tire sport action cameras nor DSLR and Mirrorless Digital Camera.

Next week we are going for another travel, at this time I will use H.265 10 bit mode, In that case camera handling sky and overall picture better during slow panning and movements. I also avoid fast speeding car shooting and use Action 4 instead for that subject.  

However if you need more test footage from pocket 3 from the car, let me know.

Regards,
Vitali.

NotAgain Posted at 7-5 22:14
Hello Dji Natalia,
All links are downloadable originals. All footage is 60fps H.264 8bit, pro mode, over 100 bitrate.

Hi there,
thank you for reaching out.

Your valuable feedback helps us continuously improve our processes. We've documented this information and forwarded it to the relevant team for further analysis. We'll be sure to keep you updated on their findings.

We appreciate your patience and understanding.