Orbit..what is a good angular speed ?

[SPP]

Hi Guys,

4K represent a challenge for many LCD display/screen "motion-resolution", I dont know if this is an accurate term..LOL.

What I mean is the judder or stutter when one do orbit which is equal to panning...if the speed exceed the display capability to refresh its LED.

What is a good degree per second have you guys tried ?..to get smooth orbit/panning.

I think this is a good reading
Standardizing Motion Resolution: "Milliseconds of motion resolution" (MPRT) better than "Lines of motion resolution" - AVS Forum | Home Theater Discussions And Reviews

Thanks
.

 

[RichWest]

Do you have an example of what you are talking about within one of your aerial videos?

Others will suggest you fly slow and then speed up in post. In real time you have to progress in speed until you find your break point of your hardware. Since the app will allow repeated Orbit shots and the time can be adjusted, makes sense to test for your hardware setup and available light.
Your frame rate and exposure play into how stutter is reduced. It is part magic, but in reality it is learned from practice and that experience... I practice with two different ball field lights, one at horizon has a contrasting background and the other is skyline.

Did I understand your question correctly?

 

[SPP]

Did I understand your question correctly?

Yes, almost. Thanks Rich.

I have 2 displays. One is a Dell 27 oldie model and its more for color correction, one is newer 24".
Oldie 27" will stutter more than newer 24". Very mild stutter, but I can see it.

First 20 seconds. Look at the island right side trees.

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I just did a calculation on another orbit test, I was doing like 4.xx degrees per second.
I will reduce that down to half next time and see how. It is scene complexity dependent too for the display to process.


Here is another example of jitter/stutter, 0:33 to 0:36 , see the very right side rocky cliff. The scene change so fast , I can see its not fluid.

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Usually panning is the worst as the entire image change at the same time fast..... go to same video 1:03, look at the people on the outer circle and the treeline, as I indicated below :



That is some serious jitter/stutter..whatever the true name is

I know slower shutter speed would blur them, but the display motion resolution also matters.

Thanks Rich

 

[RichWest]

Just had to get on the same page with you to understand what you meant. I am by no means an expert, so thanks for humoring me in attempting to be in this conversation.

I see the severity in all the videos you presented and they were viewed at 1080 full screen, and not only at the specified segments. I believe the only reason one monitor appears better over another is the screen size. I say this as you can just view the default size, as inbedded in this thread without full screen, and not see the severity of the stutter. Optical illusion? Does better display hardware eliminate?

I posted a video here, Slowing things down, and it was interesting the comments that I received. for it being steady You'd expect stutter with the cars passing by at 60mph, it was very minimal but there. The video was processed in GP Studio for a reason and the last 30 seconds was a 3 second clip slowed to 4% with Flux applied. All my videos are shot in 2.7K 60. This was upload at 1080.

I have my theory on the issue related to hardware, but seems unpopular with the experts. By hand as a test, video both a pan and/or orbit around an object using an automobile to simulated the quad's speed. Then duplicate the same with the quad. Compare the results.

And this is not a Solo exclusive, all aerial rigs have the same issue to a certain degree. I think software can eliminate most of what you are seeing, the fluxed example in my video proves it. But you have to start with solid video first to make it past the post editing degradation.

I'd hope others speak up on your questions. I'm equally interested to learn more. Look up Todd Harper's videos on Vimeo, he seems to have solved, but is not speaking up on what he has done to eliminate the stutter....

 

[SPP]

He he he...thanks Rich.

I see the severity in all the videos you presented and they were viewed at 1080 full screen, and not only at the specified segments. I believe the only reason one monitor appears better over another is the screen size. I say this as you can just view the default size, as inbedded in this thread without full screen, and not see the severity of the stutter. Optical illusion? Does better display hardware eliminate?

Hardware matters....
My 27" is IPS panel which is slower response time than my 24" which is a TFT panel.
So on my IPS panel, I see more stutter, but its is more color accurate , compared to my TFT one.

If I use gamer's display with much faster refresh rate and fast response time for its panel, I think I will get improvement. However a good color accurate screen is always slow refresh rate for now , as IPS panel is almost always the choice.
TFT Central

I need color accurate screen for underwater video, nothing else. Hence my 27" is an old Dell U2711


I posted a video here, Slowing things down, and it was interesting the comments that I received. for it being steady You'd expect stutter with the cars passing by at 60mph, it was very minimal but there. The video was processed in GP Studio for a reason and the last 30 seconds was a 3 second clip slowed to 4% with Flux applied. All my videos are shot in 2.7K 60. This was upload at 1080.

If the car in the FOV is about 20% of the entire FOV meaning its a closer shot, the stutter will happen as the display circuit and GPU need to work harder to create so much movement/changes for more pixels of the screen, aside from the display response time.

One way I can do to smooth panning is to make motion blur with high ND filter and lock shutter speed to no higher than my frame rate or double my frame rate, but its not nice if panning is what I want to see.


And this is not a Solo exclusive, all aerial rigs have the same issue to a certain degree. I think software can eliminate most of what you are seeing, the fluxed example in my video proves it. But you have to start with solid video first to make it past the post editing degradation.

Yes, all video cameras will suffer the same, but panning to a 180 degrees or more is a dronie habit
I dont know if my super old 1999 Sony TRV900 with CCD instead of CMOS will stutter as bad as CMOS sensor, surely CCD does not go jello.

I think if I keep at 2 degrees per second and no higher, I should be fine doing orbit.
This would be a circle with radius of approx 100 meters at turtle setting.

thanks Rich.