Slow playback and frame regression The playback isn't synced. Audio can not be heard. The frame cursor continously jumps back to already played frames.





Blender 2.79#5db8ac9 (2017-09-11 10:43)

Things I had done with this file.


video editing in the sequencer
executed script with codemanx's addon to set keys on strips
rendered
animation node to display tc with text strip


Things I tried to solve the playback


Frame Dropping instead of AV-sync > works, but I can't hear audio
delete all strips and data blocks
disabled all addons
hide all but one area
reopened Blender, reopened the file
check Blender's playback capabilities in another file (works)


I have lots of editing in this file, which would be difficult to reproduce in a new file. That's why I need a way to fix this.
Restarting my computer solves this. Even though playback seemed fine in all other files, the playback was restored in this file as well after rebooting my OS.