Quite often when I begin an encoding I would like to know when it has finished, and it would be great if there were some way in the MacOS version to play an audible sound (either one of the built in alert sounds or a custom audio file, doesn't really matter as long as it's attention-getting but not super annoying). Is this possible? If not is it something that could be added?
You could use the CLI version of Avidemux and chain (&&) the call with some script to plays a sound. There are no means to do so in the GUI now.