mpv player script to open directory and select currently playing file (Windows).

open-in-explorer.lua

-- open-in-explorer.lua

mp.add_key_binding(nil, "open-in-explorer", function()
    local path = mp.get_property("path")
    if path ~= nil and not path:match("^%a[%a%d-_]+://") then
        path = string.gsub(path, "/", "\\")
        mp.command_native({
            name = "subprocess",
            playback_only = false,
            args = { 'explorer', '/select,',  path .. ' ' },
        })
    else
        mp.osd_message("Invalid path: " .. (path or "No path provided"))
    end
end)

Here's the problem in more detail: mpvnet-player/mpv.net#580 (comment)

(...)
This seems to work:

mp.add_key_binding(nil, "open-in-explorer", function()
    local path = mp.get_property("path")
    if path ~= nil and not path:match("^%a[%a%d-_]+://") then
        local ps_code = [[
            Start-Process -FilePath explorer.exe -ArgumentList "/select,`"__path__`""
        ]]
        local path = string.gsub(path, "/", "\\")
        local path = string.gsub(path, "[%(%)%.%+%-%*%?%[%]%^%$%%]", "%%%1")
        local ps_path = string.gsub(path, "([$`])", "`%1")      -- escape dollar/backtick signs for PowerShell
        local ps_code = string.gsub(ps_code, "__path__", ps_path)
        mp.command_native({
            name = "subprocess",
            playback_only = false,
            args = { 'powershell', '-NoProfile', '-Command', ps_code },
        })
    else
        mp.osd_message("Invalid path: " .. (path or "No path provided"))
    end
end)

We're breaking records… At this point this seems like a case of "just Windows / mpv things" and pick your poison. It would be far more preferable to get mpv to pass it with a single set of double quotes through cmd in all cases, but i don't think it's possible.

Okay, main version seems to now work in every single case, so there's again no need to use the above PowerShell solution.

Was the fix just appending a space to the path? Please submit a PR with uosc since you have a setup to reproduce this. 🙏

Yea, a trailing space was all it takes to fix this. I've submited the mentioned PR.