Play video at various speeds

Can CasparCG play videos at variable speeds? What would be the server command?

Version                Variable Speed Playback    Stable
CasparCG 2.0.7         No                         Yes
CasparCG 2.1           Yes                        No
CasparCG 2.2           No                         Yes
CasparCG 2.3           Unknown at this stage      No

The command in 2.1.0 is as follows:

Framerate conversion control / Slow motion examples:

  >> CALL 1-10 FRAMERATE INTERPOLATION BLEND2
  ...enables 2 frame blend interpolation.

  >> CALL 1-10 FRAMERATE INTERPOLATION BLEND3
  ...enables 3 frame blend interpolation.

  >> CALL 1-10 FRAMERATE INTERPOLATION DROP_OR_REPEAT
  ...disables frame interpolation.

  >> CALL 1-10 FRAMERATE SPEED 0.25
  ...immediately changes the speed to 25%. Sound will be disabled.

  >> CALL 1-10 FRAMERATE SPEED 0.25 50
  ...changes the speed to 25% linearly over 50 frames. Sound will be disabled.

  >> CALL 1-10 FRAMERATE SPEED 0.25 50 easeinoutsine
  ...changes the speed to 25% over 50 frames using specified easing curve. Sound
  will be disabled.

  >> CALL 1-10 FRAMERATE SPEED 1 50
  ...changes the speed to 100% linearly over 50 frames. Sound will be enabled
  when the destination speed of 100% has been reached.
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It is possible to play a video in reverse?

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