AAC recorded audio not playing on platform-default players

AAC recorded audio does not play on Quicktime or Windows Media Player, and both of them support it. It is important for the base recording output to work on platform tools, out of the box. This might happen with other codecs.

This is due to a (non-)choice of the wrong profile for the codec. If you reencode the file using the ffmpeg binaries with aac you recover the sound:

ffmpeg -i input -acodec aac -vcodec copy output

and compare the output of ffmprobe for the file, you can see that the difference is just in the profile of the codec and the bitrate (< working, > not working):

< profile=LC
—
> profile=-1
21c21
< bit_rate=69522
—
> bit_rate=69536

Qt should do the same that ffmpeg does in their binaries.