[BUG] ffmpeg doesn't wants to create file

[Inky1003]

According to the log, you are not converting to aac.
Audio is extracted, but not reencoded.
Then during the muxing ffmpeg seems to abort.

Since you chose 'auto add (first)' as audio processing option, did you configure the aac encoding before loading the source?  (Otherwise the setting won't affect the source.)

Yes, I configured the aac encoding, as 255 kbps and low complexity

Encoding and muxing works fine here with your file when audio conversion is enabled properly.

I'll try downloading a new version from the site.

Cu Inky