basesink: Backward step operations fail and may lead to negative position value in Totem
Submitted by Cosimo Cecchi
Link to original bug (#761439)
Description
To reproduce:
- start playing a video
- (optional to make bug more obvious) seek in the middle
- hold comma
Notice that the state of the timeline becomes completely inconsistent.
See attached screenshot of Big Buck Bunny, but this seems reproducible with any video.
Version: 1.11.x