I have a bunch of cbr 320 mp3 that I want to reduce in size, so using lame 3.93.1 I get lots of these errors:
Error: sample frequency has changed in MP3 file - not supported
bitstream problem: resyncing...
no matter what flags I pass, i.e. --alt-presents standard, even without any flags, still lots of these errors and resulting file ends up being about 160kb...
the problematic files have id3v2 tags... if I either remove the id3v2 tag OR convert it to a v1 tag then lame can handle that file just fine... OK workaround for me.
I have lots of other files with id3v2 tags that work just fine.. only a few can't be converted...