Jittery video (Dlog-M)

[lukasz74nj]

Hello,

I'm getting somewhat jittery video and I'm not sure if this is related to compression or perhaps a gimbal issue. The attached pictures show 3 consecutive frames of a 4k/30fps video imported into a 4k/30fps timeline in fcpx. You can see that the 1st frame appears on frames 2 and 3 creating a jittery effect.

- ND filter with shutter set to double the frame rate (60)
- Dlog-M mode, default style (0, 0, 0)
- I verified that my memory card (SanDisk Extreme, V30, U3, A2) can sustain writes up to 40 MB/s
- running latest firmware, Mavic 2 Pro.

What could be the reason?

 

[Thomas B]

Please post an example video clip. Very hard to comment on captured stills from video regarding your question.

 

[lukasz74nj]

Please post an example video clip. Very hard to comment on captured stills from video regarding your question.

Sure. How do I attach a large file (~100 MB) here? Do I need to upload to YouTube and share a link? Thanks.

 

[Thomas B]

Sure. How do I attach a large file (~100 MB) here? Do I need to upload to YouTube and share a link? Thanks.

Upload it to YouTube and post the “share” link as copy pasted text... don’t use the “attach files” button. Note that YouTube may take a couple of hours to have the vid in 4K... before that it is lower resolution.

 

[lukasz74nj]

Upload it to YouTube and post the “share” link as copy pasted text... don’t use the “attach files” button. Note that YouTube may take a couple of hours to have the vid in 4K... before that it is lower resolution.

Actually, I figured this out. I was using the Optical Flow for the Video Quality (in fcpx), which introduced these artifacts. In fact, first I slowed down the video to 80% (to get 24fps) - which itself didn't degrade the quality. Only after I changed the Video Quality setting the video become degraded. Looks like it is not always the best setting.

 

[Thomas B]

Glad you got it worked out! Happy flying!

 

[lukasz74nj]

Glad you got it worked out! Happy flying!

Thanks. Going to French Polynesia next week, got a bit scared

 

[Dave Maine]

All retiming processes in Final Cut will introduce some problematic artifacts when slowing down footage from the original frame rates. Speeding the footage up generally works better. I always shoot at the highest frame rates possible when I think I will need slow motion.

 

[darkenmage]

Hello. I just got the Air 2 combo with the smart controller and I am a newbie. The video feed on the smart controller is really jittery. I don’t believe I changed any settings just plain factory settings just for my first test flight.

would appreciate any suggestions….

TY