Thanks for your reply. The log say "E: 18:23:45 Traceback (most recent call last):
File "picard\util\thread.pyo", line 46, in run
File "picard\formats\mp4.pyo", line 113, in _load
File "mutagen_file.pyo", line 38, in init
File "mutagen\mp4.pyo", line 1029, in load
error: Not a MP4 file"
I have convert the files with fre:ac and convert from FLAC to AAC with file extension .mp4. I tried again with file extension .aac but Picard not copy any file to unmatched files.
Should I try another converter or what you suggest?