speed(-1) doesn't work

[lhcui]

https://processing.org/reference/libraries/video/Movie_speed_.html

Description： Sets the relative playback speed of the movie. The rate parameters sets the speed where 2.0 will play the movie twice as fast, 0.5 will play at half the speed, and -1 will play the movie in normal speed in reverse.

but I have tried -1 for several movie files, reverse play is impossible.

[codeanticode]

Hello, I just run the Reverse example on Processing 3.0a4 and works as expected. Does it for you? Or the problem appears with other video files?

[shiffman]

We've confirmed that playing with reverse does work, but with some caveats namely the video codec. I've added notes to the documentation here: processing/processing-docs@163cb8b