If your footage was rejected with “Clip has quality issues related to post production, animation, or chroma key technique” it is most likely because of one of the following issues:
Post Production Technique
Stabilization added in post creates noticeable and distracting warping or distortion.
Animation is too simple or has technical errors, such as aliasing.
Green screen is overly dark, wrinkled, or misplaced.
Blur added on logo or face detracts from the clip.
Here are some examples of clips with well executed effects:
Footage by Perfect Lazybones
The motion blur added is well balanced and adds to the fast movement of vehicles.
Footage by NIMEDIA
This animation has many layers that come together smoothly.
Both the subject and green screen are evenly lit.
Footage by Anatoly Tiplyashin
The subject is in focus and cleanly keyed out.
Footage by ReedealHD
Camera shake adds to the action appearing in the clip.
Review clips with filters or added effects for distortion.
Include motion, style, and depth in an animation.
Be mindful of digital flickering and rendering errors.
Ensure green screen is properly lit and matte is flat.
Prevent visible choke and static on the keyed out subject.
Soften or feather the edges of a blur.
Submit clips with subtle or organic camera movement without adding stabilization in post.
Here are some additional resources you may find helpful:
Support Center articles
Adobe Premiere Pro Animation guide
5 Quick and Easy Cinema 4D Tutorials for Making Great Animations
How to use a Green Screen
6 Key Factors When Choosing a Green Screen Background
Video Editor Toolbox Freebies
Contributor Blog articles
What are the technical requirements for footage?
Do you accept footage with alpha channels?
Shuttertalk Live presentations
How Footage Customers Use your Content
If you don’t understand the reason for the rejection of your footage or if you need additional clarification, you can always contact contributor support.