The thumbnail gets stuck when the mouse is moved repeatedly on the timeline

[natural-harmonia-gropius]

#4 mitigated the issue, but does not solve it.

Drifting.Home.2022.1080p.NF.WEB-DL.DUAL.DDP5.1.H.264-SMURF.mkv.-.mpv.2022-09-20.17-47-27_Trim.mp4

[dyphire]

Can be reproduced on Windows.

[po5]

I'm aware of it, it's caused by the retry mechanism not re-rendering the existing finished thumbnail at the new position, if one exists.

thumbfast/thumbfast.lua

Lines 303 to 314 in 9970e44

	local info = mp.utils.file_info(options.thumbnail)
	if not info or info.size ~= thumb_size then
	if thumbtime == -1 then
	can_generate = true
	return
	end
	if thumbtime < 0 then
	thumbtime = thumbtime + 1
	end
	-- retry up to 5 times
	return mp.add_timeout(0.05, function() display_img(w, h, thumbtime < 0 and thumbtime or -5, display_time, script) end)
	end

Should be able to fix this in a couple hours.