mpv/TOOLS/lua/observe-all.lua

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-- Test script for property change notification mechanism.
function format_property_val(v)
if type(v) == "table" then
return mp.format_table(v) -- undocumented function; might be removed
else
return tostring(v)
end
end
for i,name in ipairs(mp.get_property_native("property-list")) do
mp.observe_property(name, "native", function(name, val)
print("property '" .. name .. "' changed to '" ..
format_property_val(val) .. "'")
end)
end