Effects Play Speed - video editor

the Effects Play Speed for Video/Audio/Subtitle Editor
function for
- change the chapter play speed
the dialog
the parameters
- factor, the value of speed you want change to, for example
  - 0.1 mean 1/10 speed
  - 2 mean double speed
examples
- see Effect example1
note
- current is work for video only, audio and subtitle is no yet.