pmf to mp3 conversion is probably searched by users that are looking for a way to extract and save the audio track from older Sony PlayStation PSP movies (.pmf files) as MP3 audio.
This can be actually quite a challenge nowadays, considering that this format was used actively like 15 years ago. Still, some modern multimedia converters do support it and allow such export.
In the past users used a tool called Cole2k Media Standard for this, which you can still find on some websites.
Updated: November 2, 2023