Why OSC track id shows sid/aid after mpv v0.39.0

[verygoodlee]

In v0.38.0 shows OSC counted id.

mpv/player/lua/osc.lua

Lines 426 to 436 in 02254b9

	-- get the currently selected track of <type>, OSC-style counted
	function get_track(type)
	local track = mp.get_property(type)
	if track ~= "no" and track ~= nil then
	local tr = tracks_mpv[type][tonumber(track)]
	if tr then
	return tr.osc_id
	end
	end
	return 0
	end

this function was removed after v0.39.0 and replaced with the sid/aid prop.

mpv/player/lua/osc.lua

Lines 1873 to 1879 in 78ee714

	local sid = mp.get_property("sid")
	if sid == "no" or sid == "auto" then
	sid = "-"
	end
	return ("\238\132\135" .. osc_styles.smallButtonsLlabel .. " " ..
	sid .. "/" .. sub_track_count)

sid/aid may greater than track count, resulting in this weird track information.

occurs after sid 6 removed by sub-remove command.

[verygoodlee]

@guidocella Introduced in 1a558bf5

this statement is wrong, sub-remove/audio-remove command might make them unequal.

mpv's track id and the osc_id are exactly the same

[guidocella]

It uses sid and aid to reduce the size of the code. It is not worth keeping track of removed tracks. If anything the track id should not be shown at all since it is not useful information. The track button can be drawn gray to show that no track is selected, and be hidden to show that no tracks are available instead.

[verygoodlee]

The track button can be drawn gray to show that no track is selected, and be hidden to show that no tracks are available instead.

gray usually means button is unclickable, which is more suitable for indicating that there is no available tracks,
may need to design another icon to indicate that no track is selected, something like this

[guidocella]

Yeah, even better. Also note that using different ids caused a different bug in #10968