Audacity Forum

... the type of the file 'C:\Users\danie\AppData\Roaming\audacity\AutoSave\Episode 24 - Dan - 2019-06-30 13-03-16 N-68.autosave'. Try installing FFmpeg. For uncompressed files, also try File > Import > Raw Data. Full story: I recorded a track and then saved the project. I moved the .aup file ...

... I'd try again, but I was surprised when Audacity told me the following: Audacity did not recognize the type of file. Try installing the file, FFmpeg. Also try File>Import>Raw Data. Even though Audacity had recognized the same file yesterday with no problem, I downloaded FFmpeg, and I also ...

... of Mp4 file in Reaper: 06.08.200 (6m,8s,200ms) Length of Mp4 file in Audacity: 6m,8s, 192ms Seems almost identical. Could be that related to FFmpeg library Audacity uses ?

... 2.3.2 started loading). So the time taken by this error is less than a second. The next logged event is at 05:11:58 when Audacity attempts to load FFmpeg. This occurs after Audacity has scanned the audio system. It is reasonable / normal for that scan to take a couple of seconds. Other initialisation ...

... Couldn't find symbol 'AudacityModule' in a dynamic library (error 127: The specified procedure could not be found.) 05:11:58: Trying to load FFmpeg libraries... 05:11:58: mLibAVFormatPath ('C:\Program Files (x86)\FFmpeg for Audacity\avformat-55.dll') is not empty. Loading from it. 05:11:58: ...

... but startup is still just as slow. 3) Upgraded to 2.3.2. The error returned. Startup still slow. 03:06:25: Audacity 2.3.0 03:06:25: Trying to load FFmpeg libraries... 03:06:25: Trying to load FFmpeg libraries from default path, 'C:\Program Files (x86)\FFmpeg for Audacity\avformat-55.dll'. 03:06:25: ...

... logs from both the SSD and HDD installs. Note that the new SSD installed system delays about 10 or so seconds after the error before loading the FFmpeg libraries. But the HDD system only delays for about 2 seconds after the error. SSD system: 00:12:36: Audacity 2.3.2 00:12:36: Error: Couldn't ...

Audacity, has always been able to open the audio from an .mp4 file Just for information, Audacity has never supported MP4 without help from either FFmpeg or QuickTime. Also, the current version of Audacity is 2.3.2 (available via the Audacity website: https://www.audacityteam.org/download/windows/)

Make sure FFmpeg is installed.

...At some point in Audacity's history there was an upgrade where you had to upgrade FFmpeg too, so if you've had Audacity for a long time you may need to delete and re-install it.

It's not an MP3. It's an MP4 (AAC). (Thanks for attaching the file! I checked it with MediaInfo.)

Rename the file to .MP4 or .AAC, And if you haven't done so already, Install FFmpeg for Audacity.