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AudioFile API and mp4/m4a files

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AudioFile API and mp4/m4a files

Subject: AudioFile API and mp4/m4a files
From: Martin Hairer <email@hidden>
Date: Fri, 20 May 2005 20:19:56 +0100

Hi, I have been able to successfully create CAF and ADTS files containing AAC data using the AudioFile API. When using the exact same piece of code to create an mp4 file however, the resulting file is about 4MB larger! The funny thing is that it would create a file of say 6.5MB (which by the way plays fine in QT player), but when I open the file in QT player and type command-I, it would say that the file contains 1.5MB of data. Creating a CAF or ADTS file with precisely the same settings indeed produces a 1.5MB file.

Does anybody have an idea of what's going on here? Is there some obvious setting that I could be missing? Thanks,

Martin

HairerSoft
http://www.hairersoft.com/


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