FLAC uses vorbis tags doesn't it? Does foobar2000 write any changes to tags in FLAC files in the vorbis manner (i.e. if you change one of the tags or add replygain does it add it into the normal FLAC tag or does it add and apev2 tag onto the end?)?

I imagine all is done in the best possible way, but I just thought I'd ask.

Thanks

It writes native FLAC metadata which is identical to Vorbis comments.

Thanks Case.

Are FLAC metadata located at the beginning of the file ? Today, I tagged some flac files with a lot of personnal fields, and I was badly surprised to see the time it took. Is there any way to add APEv2 tags to FLAC ? Or maybe add some padding with foobar ?

Unfortunately yes.

FLAC should handle presence of APEv2 tags fine but it's better not to use it unless Josh Coalson makes it officially supported and adds read support for it in other plugins too.
Tag updating should be fast on files created with new 1.1.0 encoder which uses 4KB padding by default, but it shouldn't hurt to make also foobar's tag writer auto-pad files. I'll try to get it written for next foo_flac version.

Edit: padding added, foobar now adds enough padding so that comments + padding equals at least 4KB. New version here.

I like such answers

I suspected a preexistant padding when I tagged my flac files. I probably exceed the 4096 bytes, and then, tagging became a real pain.
Thank you for your updated plug-in. I will test it this night. One question : can I choose my own padding value ? Is it possible to implement that ? Anyway, thank you again