Extra blank time at the end of MP3 file
I had some m4a files and I converted them to mp3 with iTunes. But when I opened some of the converted mp3 files with spek 0.82 it shows extra blank time at the end. In one example, both the m4a and mp3 files are 02:44 minutes long but when I open the mp3 file with spek it shows that it is 03:01 minutes long and the extra seconds at the end are blank with no sound. In file properties in windows as well as music players it shows 02:44. Is there a reason it shows up differently in spek ?

Is there any chance you can provide me with said file?
This is likely fixed in the new version that includes much newer ffmpeg libraries. Try it out and if it still doesn't work please include a sample demonstrating the error: https://github.com/alexkay/spek/releases/tag/v0.8.5