I am trying to mass id tag hundreds of m4a files. I have the current release of Tag&Rename with M4a tagging. When I encode the ripped files to MP4 with Nero and rename the extensions to M4a, T&R displays the files but does nothing when trying to apply the M4a tag ids. I prefer T&R as it is functionality fast for tagging a lot of files. I tried iTunes but it is sloooowww go for hundreds of files.

Is there another tagging utility there out until T&R gots the bugs worked out?

Thanks for any help.

Foobar2k has quite good masstagging abilities out of the box.

You can use Foobar2000. It truly is the "swiss army knife" of audio compression.

Just load up all the files you want to tag in a playlist, highlight the ones you want to tag (CTRL+A to highlight all), right-click and go to Mass Tagger. That easy!

Or you could use Mp3tag

I found a good mass tag tool for m4a tags for iPod. That's Tag and M3U. It's the most compatible m4a tag tool with itunes currently. try it
http://www.777soft.com

Most compatible? I haven't had a problem using Foobar2000's Masstagger for iTunes M4A files. iTunes recognizes the tags just fine. Plus Foobar2000 is free while that Tag & M3U app costs $40.

Tag and M3U looks to be cheap rip-off of Tag & Rename. If you (roxbin) are the developer, I would double-check the copyright laws in your country. Obviously you have some good insurance.

Anyway, I solved my original problem of not being able to update the tags in Tag & Rename - It was that the mp4s were originally encoded with Nero. I switched to iTunes AAC encoding, went back to Tag & Rename and voila! the tagging worked. What is it with Nero encoding?

Lesson leaned.

I recommend MP3Tag. It works well on mp3/mp4/m4a/etc. You can find it here: http://www.mp3tag.de/en/index.html. It's free.

Key word is found. He's probably not the developer.

Anyone knows how to read tags for iTunes m4a and m4p files from the command line?

I am making this tool that convert my entire music collection in FLAC to a lossy codec of my choice.
Right now it only does mp3's, but I would like it to do aac as well.

I need a program to launch from the command line that will display the tags in an m4a or m4p file. (Like metaflac does for FLAC files)

I have no use for a User Interface as my tool will convert thousands of files without user interaction.

I found half of a solution:

A small program named tg made by Richard:

command line aac/mp4 tagger

It reads .m4a tags, however it does not read tags in a protected aac (.m4p)

foobar2000 reads tags in both .m4a and .m4p files, but do anyone know of a command line tool that can do the same?