Get more from your Mavic
The largest Mavic community in the world
Join Us Now

Grass abruptly changes texture/brightness: Compression artifact?

Jeremy Stanley

New Member
Joined
May 11, 2017
Messages
4
Reactions
6
Age
42
Visit site
Today I tried out the ActiveTrack feature of my new Mavic Pro, and I'm very happy with the tracking, but there's a distracting artifact with the grass. It seems to abruptly change texture/brightness several times per second.


This was shot at 4K/30. I've already discovered that 1080p60 is unusable due to moire effects.

Is this the sort of artifact people suggest shooting at 2.7K to resolve? Or would getting a set of ND filters help for this, by allowing individual frames to have some motion blur? (Instead of being a sequence of pin-sharp 1/1000-second exposures.)
 

JoostGT3

Well-Known Member
Joined
Apr 11, 2017
Messages
742
Reactions
499
Age
40
Visit site
It may have to do with the codec as well. Mavic renders the movies with the h264 codec. As I understood it, this codec only stores fully rendered images every 8 or so frames (p-frames). The frames in between are just rendered as measured alterations from the previous fram (i-frames). When you have scenes that have lots of fine detail in them that change rapidly, you get this kind of movies. I'm not sure if my explanation is entirely correct, and I'm also not sure whether there is a solution. If there is, I haven't found it yet!
 

mw174620

Well-Known Member
Joined
May 13, 2017
Messages
90
Reactions
20
Age
29
Visit site
You could try using 24fps, which will help slightly and give more of a cinematic feel.

Also, you could lower the shutter speed. That seems a little fast from my experience.
 
  • Like
Reactions: JoostGT3
Lycus Tech Mavic Air 2 Case
DJI Mavic Mounts

New Threads

Forum statistics

Threads
96,654
Messages
1,110,639
Members
124,186
Latest member
Vekhuya