prfl
=
Profile Box
Movie
の主な機能。
具体的には、必要な
コーデック
や最大
ビットレート
など。
Existing movies may contain a movie profile atom, which summarizes the main features of the movie, such as the necessary codecs and maximum bit rate. In addition, the movie atom contains a track atom for each track in the movie.
QuickTime File Format Specification