Video issue
1117 21 2017-1-10
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bphillip28
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I have been doing some test flights with my new P4P when the weather allows here in the Seattle area. On a number of flights I'm seeing a strange waving effect, but not always. For example tress appear to bend as the video shifts from left to right.   Shows the effect, though it is much more obvious in the orginal footage. It was about noon, but overcast.

Is there something for me to calibrate, a setting or does my new craft have an issue?

Bryan
2017-1-10
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Svt04cobra
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Your video is private. Not much anyone can do if we can't see it.
2017-1-10
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bphillip28
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Svt04cobra Posted at 2017-1-10 11:08
Your video is private. Not much anyone can do if we can't see it.

Please try now.
2017-1-10
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PliciPleosc
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I am afraid I might have bad news for you... Have a look at my topic. I am waiting for my replacement drone because some kind of problem that look awfully similar with what I can see in your video. But I've uploaded in Dropbox original video files.

http://forum.dji.com/forum.php?mod=viewthread&tid=78719&page=1

Make sure you upload a not edited test footage (not youtube!) somewhere online, and discuss it with DJI Support.

2017-1-10
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DJI Natalia
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Bryan, may I know what the temperature when you flew it?
The small foam on the gimbal has been removed , firmware is up to date and you have done all the calibration, but the situation persists, right?
Please upload the original video without editing to dropbox, I'll transfer it to our engineers for a further evaluation.
2017-1-10
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jimhare
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To me it looks like a lot of vibration that is being compensated for by the gimbal but creating a jello effect.    It's been suggested that very cold temperatures can cause this.
2017-1-10
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Geebax
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jimhare Posted at 2017-1-10 20:19
To me it looks like a lot of vibration that is being compensated for by the gimbal but creating a jello effect.    It's been suggested that very cold temperatures can cause this.

Jello only has one cause, the camera is vibrating. There is a growing myth about it being attributed to cold, but it is not true. There is mild jello in the sample footage posted, but it can be caused by a number of factors, from bad adjustment of the gimbal to unbalanced propellers.
2017-1-10
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bphillip28
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DJI Natalia Posted at 2017-1-10 19:19
Bryan, may I know what the temperature when you flew it?
The small foam on the gimbal has been removed , firmware is up to date and you have done all the calibration, but the situation persists, right?
Please upload the original video without editing to dropbox, I'll transfer it to our engineers for a further evaluation.

It was about 32°F, though the drone had just been brought out from inside. The foam was removed. Firmware up to date. Some of the video files are fine, others segments of videos wobble. I did another gimbal calibration tonight on the table indoors. With no props, sittingon a table the video looks fine. I will conduct further tests. But this issue has show itself on multiple outings.
https://www.dropbox.com/s/khu1w8ea4arfhjz/DJI_0005_1.mov?dl=0
https://www.dropbox.com/s/sf15m790ieqpz5v/DJI_0009.MOV?dl=0
2017-1-10
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kykphantom
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bphillip28 Posted at 2017-1-10 21:41
It was about 32°F, though the drone had just been brought out from inside. The foam was removed. Firmware up to date. Some of the video files are fine, others segments of videos wobble. I did another gimbal calibration tonight on the table indoors. With no props, sittingon a table the video looks fine. I will conduct further tests. But this issue has show itself on multiple outings.
https://www.dropbox.com/s/khu1w8ea4arfhjz/DJI_0005_1.mov?dl=0
https://www.dropbox.com/s/sf15m790ieqpz5v/DJI_0009.MOV?dl=0

My friend, this is the Jello effect. It is has nothing to do with temperature. I have exactly the same problem and my drone is flown at 12 degrees Celsius. My propellers are perfectly balanced.

The problem is due to vibrations of your gimbal. Nothing will help (IMU, gimbal calibration, try anything). If you lower the shutter speed you might "hide the problem" but not solve it.

Sorry about that. But Jello effect is the result of camera vibrations.
2017-1-11
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jimhare
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Geebax Posted at 2017-1-10 21:33
Jello only has one cause, the camera is vibrating. There is a growing myth about it being attributed to cold, but it is not true. There is mild jello in the sample footage posted, but it can be caused by a number of factors, from bad adjustment of the gimbal to unbalanced propellers.

I realize that.  Cold may be causing vibration that the gimbal is trying to compensate for but causing the jello.   I'm not suggesting that the cold itself altered the sensor image.

Maybe the cold weather causes the motors to be unbalanced, who knows.  Just saying it could be a factor.

Jello is caused by the sweep of the sensor, where by the time it gets to the bottom the image has changed from where it started at the top.  

Simple stuff, we're trying to work out why the vibration happened.
2017-1-11
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bphillip28
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jimhare Posted at 2017-1-11 14:46
I realize that.  Cold may be causing vibration that the gimbal is trying to compensate for but causing the jello.   I'm not suggesting that the cold itself altered the sensor image.

Maybe the cold weather causes the motors to be unbalanced, who knows.  Just saying it could be a factor.

Took another flight today, it was 38° with some sun. The results with new props, calibration of gimbal and compass made no difference. When I watch the Phantom and camera just 8 ft off the ground it looks very steady, but not the video.
https://www.dropbox.com/s/n3fcnty5jvihnjw/DJI_0001_2.mov?dl=0
2017-1-11
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jimhare
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bphillip28 Posted at 2017-1-11 15:44
Took another flight today, it was 38° with some sun. The results with new props, calibration of gimbal and compass made no difference. When I watch the Phantom and camera just 8 ft off the ground it looks very steady, but not the video.
https://www.dropbox.com/s/n3fcnty5jvihnjw/DJI_0001_2.mov?dl=0

Downloading your video now, will have a look then respond.
2017-1-11
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jimhare
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bphillip28 Posted at 2017-1-11 15:44
Took another flight today, it was 38° with some sun. The results with new props, calibration of gimbal and compass made no difference. When I watch the Phantom and camera just 8 ft off the ground it looks very steady, but not the video.
https://www.dropbox.com/s/n3fcnty5jvihnjw/DJI_0001_2.mov?dl=0

Yeah, definitely some jiggling going on there!   Guessing there wasn't much wind up there?   Might need to send it back for them to have a look, something not right here.

Also, notice that the effect is more pronounced on the highly detailed leaveless trees?  Could be compression also creating a shimmer and enhancing the jello even more.  
2017-1-11
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bphillip28
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jimhare Posted at 2017-1-11 20:52
Yeah, definitely some jiggling going on there!   Guessing there wasn't much wind up there?   Might need to send it back for them to have a look, something not right here.

Also, notice that the effect is more pronounced on the highly detailed leaveless trees?  Could be compression also creating a shimmer and enhancing the jello even more.

The wind was very slight, not enough to move the upper tree foliage. I have some footage taken on the ground before motor start that looks wavy to me. The edges show the most issue, but as you point out the deciduous trees are a good indicator too. I wonder if the gimbal could be twitching, creating camera movement. The gimbal is obviously able to make amazingly rapid movements in order to hide the drones sometimes sudden moves.
https://www.dropbox.com/s/ve1w938gnhx5ugt/DJI_0019.MOV?dl=0

How do you get DJI supports attention formally?
2017-1-12
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jimhare
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bphillip28 Posted at 2017-1-12 10:51
The wind was very slight, not enough to move the upper tree foliage. I have some footage taken on the ground before motor start that looks wavy to me. The edges show the most issue, but as you point out the deciduous trees are a good indicator too. I wonder if the gimbal could be twitching, creating camera movement. The gimbal is obviously able to make amazingly rapid movements in order to hide the drones sometimes sudden moves.
https://www.dropbox.com/s/ve1w938gnhx5ugt/DJI_0019.MOV?dl=0

You can start a warranty claim on their support site.   Sounds like that may be the next step as none of these issues should be happening.

https://repair.dji.com/en/SelfRepair/Area
2017-1-12
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bphillip28
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bphillip28 Posted at 2017-1-12 10:51
The wind was very slight, not enough to move the upper tree foliage. I have some footage taken on the ground before motor start that looks wavy to me. The edges show the most issue, but as you point out the deciduous trees are a good indicator too. I wonder if the gimbal could be twitching, creating camera movement. The gimbal is obviously able to make amazingly rapid movements in order to hide the drones sometimes sudden moves.
https://www.dropbox.com/s/ve1w938gnhx5ugt/DJI_0019.MOV?dl=0

I tried some video at 60fps to see it it would wobble, wow, that is really bad. It is so choppy I can't tell much. What might cause this problem? https://www.dropbox.com/s/9ykr1uellyez6g9/DJI_0026.MOV?dl=0
2017-1-12
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kykphantom
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bphillip28 Posted at 2017-1-12 20:04
I tried some video at 60fps to see it it would wobble, wow, that is really bad. It is so choppy I can't tell much. What might cause this problem? https://www.dropbox.com/s/9ykr1uellyez6g9/DJI_0026.MOV?dl=0

This might be a slow computer. Have you upgraded the firmware and check the jello effect again?
2017-1-13
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bphillip28
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kykphantom Posted at 2017-1-13 21:57
This might be a slow computer. Have you upgraded the firmware and check the jello effect again?

Slow computer?  So the link above looks fine to you? I did not edit that, just uploaded from the microSD.

The firmware to my knowledge gets checked and upgraded whenever you have the P4P running near your wifi, and you follow the prompt in the app.
2017-1-14
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bphillip28
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bphillip28 Posted at 2017-1-14 08:40
Slow computer?  So the link above looks fine to you? I did not edit that, just uploaded from the microSD.

The firmware to my knowledge gets checked and upgraded whenever you have the P4P running near your wifi, and you follow the prompt in the app.

To my surprise the play back of the 60fps video was my computer. I never expected this because this computer has an $750 video card, but it is for CAD and not good for video I guess.
2017-1-14
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PliciPleosc
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bphillip28 Posted at 2017-1-11 15:44
Took another flight today, it was 38° with some sun. The results with new props, calibration of gimbal and compass made no difference. When I watch the Phantom and camera just 8 ft off the ground it looks very steady, but not the video.
https://www.dropbox.com/s/n3fcnty5jvihnjw/DJI_0001_2.mov?dl=0

Do a simple test, like I did, no props, just place drone on something and start filming. My gimbal was not visibly vibrating nor my hand could perceive any kind of vibration, drone or gimbal. Motors were not started, no props, temps well within specs, and still more jello effect than in your videos.

My drone got replaced.
2017-1-14
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Geebax
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bphillip28 Posted at 2017-1-14 11:13
To my surprise the play back of the 60fps video was my computer. I never expected this because this computer has an $750 video card, but it is for CAD and not good for video I guess.

The expensive video card will not help unless you use a player that can use the card. Try VLC Player.
2017-1-14
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fans19aa1f3f
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I have the same problem, did you find how to solve it?
2017-10-15
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