I needed to wrap an AAC file in an M4A container so I could load it into my Windows Phone 7 (WP7) music collection. First I downloaded the FFmpeg software from here: http://ffmpeg.zeranoe.com/builds/ Then I unzipped the files and ran the following command:
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C:\FFmpeg\bin>ffmpeg -i "song.aac" -acodec copy -absf aac_adtstoasc "song.m4a" |
That solved the problem of not being able to add an …