I use beets and tag and organize my FLAC files, then use the beet convert
command to make AAC files. The convert process isn’t writing gapless playback information to the AAC file.
The fdkaac command line tool is able to do this, but that won’t do a direct conversion from FLAC to AAC. And it doesn’t convert metadata.
Is there some way to get beets to add these tags on conversion?