I've cut the mp3 file with ffmpeg - and after that I get wrong duration (as shown in player).
I tried every option in MP3 Diags, and also mp2val program - but non fixes it.
Could You help?
Normally you should be able to click on "Apply a single transformation" and choose either "Repair VBR data" or "Rebuild VBR data" (both should work, if your file is VBR.)
If that doesn't fix it, can you send me the file at email@example.com or put it somewhere where I can get it? And tell me what player you are using.