This problem still occurs in 17.10. I just ripped a kids music disc via Rhythmbox using MP3 default settings (=VBR/medium). Files are perceived (by RB and nautilus) as 32Kbps:
% file 19\ -\ Five\ Days\ Old.mp3
19 - Five Days Old.mp3: Audio file with ID3 version 2.3.0, contains:MPEG ADTS, layer III, v1, 32 kbps, 44.1 kHz, JntStereo
% mp3val 19\ -\ Five\ Days\ Old.mp3
Analyzing file "19 - Five Days Old.mp3"...
WARNING: "/home/ddl/Music/Laurie Berkner/Lullabies/19 - Five Days Old.mp3": VBR detected, but no VBR header is present. Seeking may not work properly.
INFO: "/home/ddl/Music/Laurie Berkner/Lullabies/19 - Five Days Old.mp3": 7087 MPEG frames (MPEG 1 Layer III), +ID3v2, no VBR header
I can partly "fix" file metadata (via vbrfix and mp3val -f), but nautilus and RB then display bitrate as "unknown".
This problem still occurs in 17.10. I just ripped a kids music disc via Rhythmbox using MP3 default settings (=VBR/medium). Files are perceived (by RB and nautilus) as 32Kbps:
% file 19\ -\ Five\ Days\ Old.mp3
19 - Five Days Old.mp3: Audio file with ID3 version 2.3.0, contains:MPEG ADTS, layer III, v1, 32 kbps, 44.1 kHz, JntStereo
% mp3val 19\ -\ Five\ Days\ Old.mp3 ddl/Music/ Laurie Berkner/ Lullabies/ 19 - Five Days Old.mp3": VBR detected, but no VBR header is present. Seeking may not work properly. ddl/Music/ Laurie Berkner/ Lullabies/ 19 - Five Days Old.mp3": 7087 MPEG frames (MPEG 1 Layer III), +ID3v2, no VBR header
Analyzing file "19 - Five Days Old.mp3"...
WARNING: "/home/
INFO: "/home/
I can partly "fix" file metadata (via vbrfix and mp3val -f), but nautilus and RB then display bitrate as "unknown".