Hello! Thanks for taking your time to help me 
I’m trying to open a .mogg file in Audacity 2.1.0, so I can convert it into a .ogg file, and it does not open. Whenever I try to open it, I get this error message:
“Audacity did not recognize the type of file. If it is uncompressed, try importing it using ‘Import Raw’.”
I have looked around for help/solutions, but have found no solutions to my problem. I would greatly appreciate some help!
(I’m on Windows 8.1 64-bit)
I understand. One of the first Google hits says: Use Audacity to open your .mogg file."
I’m betting they left out a step. Audacity isn’t all that talented by itself, but it does very well after you add the FFMpeg software.
http://audacityteam.org/download/
Drill down to the FFMpeg software.
Koz
Also, since you’re on Windows, you could have a file called MyMusic.mogg.mp4 and Windows would conveniently hide the .mp4 extension leading you to think you had a straight .mogg file.
Hidden File Extensions - Windows
– Start > My Computer > Tools > Folder Options > View > [ ] Hide Extensions for Known File Types (deselect)
– Apply (to this folder) or Apply to All Folders
– OK
Koz
Thank you so much! It worked!
Note though that there is no direct link to FFmpeg there. There is a link to FFmpeg on Audacity ® | Download for Windows.
I recommend linking directly to the FAQ: Audacity Manual.
Also the included OGG importer should “in principle” import MOGG (multi-channel OGG) files without FFmpeg. If the files are encrypted as they often are if they come from a game, they can’t be imported by any method.
Issues with MOGG files have also been reported if the files are very large, which requires modifying the file headers.
Gale