I have to do an animation of the inside of an elevator travelling between floors. My AE composition consists of different jpgs (elevator doors and -walls) animated with position keyframes.
Composition settings: size: 2160 x 2560px / frame rate: 50
Render setting: H264 / bitrate 10-12MBit
The mp4 file doesn't play back smoothly in any video player (QT, vlc) nor in a timeline of Adobe Premiere. The problem is random though: once, it plays fine, and then it stutters next time. The jerky movement is not constant; like every 2 seconds there is a 'hick' within the otherwise smooth movement.
I experimented a lot now with changing the bitrate and the keyframe interval, it doesn't help. What I don't understand is that a composition of exactly the same frame size with 4k video footage is playing just fine.