Accelerating video on mpv does not lead to accelerated playback for other participants.

[vi]

Describe the bug

When I accelerate or slowdown video with mpv, I expect syncplay to duplicate those actions across other participants. However, it resyncs and resets speed back to 1x instead.

To Reproduce

1. Start two instances of syncplay, join the same private room. mpv starts along with syncplay's window.
2. Add a file from media folder to playlist and playit.
3. Start playing the file.
4. In one of mpv's window, press } key to speed up video 2x.

Expected behavior

Other mpv also switches playback speed to 2x without explicit keyboard input.

Actual behavior

Other mpv still plays video at 1x. syncplay detects it and rolls back video speed to 1x.

Version and platform:

• OS: Linux Debian Bullseye
• Syncplay version and build type: 1.6.7 (Yoitsu)
• Media player and version: mpv 0.32.0

Additional context Add any other context about the problem here.

[daniel-123]

I'm afraid nothing has really changed since this was discussed in #339 #115 and #406

Syncplay isn't designed to sync playback speeds across and adding this feature would need very significant amount of effort. Possibly up to including rethinking entire syncing algorithm.

[Et0h]

@daniel-123 has summarised it well and linked to relevant discussions so I'll not go into details. In summary, while I can see why this would be a neat feature it is a big development headache due to how Syncplay and its protocol have been designed.