print the arguments to be executed

encoder.lua

@@ -150,6 +150,8 @@ this.create_clip = function(clip_type, on_complete)
         end
     end)()
 
+    print("The following args will be executed:", table.concat(h.quote_if_necessary(args), " ") )
+
     local output_dir_path = utils.split_path(output_file_path)
     local location_info = utils.file_info(output_dir_path)
     if not location_info.is_dir then

helpers.lua

@@ -83,4 +83,16 @@ this.human_readable_time = function(seconds)
     return ret
 end
 
+this.quote_if_necessary = function(args)
+    local ret = {}
+    for _, v in ipairs(args) do
+        if v:find(" ") then
+            table.insert(ret, (v:find("'") and string.format('"%s"', v) or string.format("'%s'", v)))
+        else
+            table.insert(ret, v)
+        end
+    end
+    return ret
+end
+
 return this