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Monday, October 25, 2010

Audio file formats that support embedded markers and comments/annotations?

Programmer Question

I am looking at creating an app for OS X and/or iOS that allows the user to arbitrarily embed markers into the audio at various intervals during the audio recording process. It would be nice to have a single file that could contain this information, but may or may not be efficient or feasible. I suppose it is similar to what YouTube annotations allows.



Requirements:




  • Ability to insert markers at certain time points of an audio recording

  • Ability to save a name for the marker as well as a brief description



This is for audio created by the app I'm working on, so is not for importing audio from other sources for markup.



Currently, the thinking is keeping two files - one for the audio and one for the markers/comments/annotations; but if possible, it would be nice to have this data all in a single file. Which could be done using something like the .rtfd container.



I looked at AIFF which appears to support Marker and Comment chunks, but would it be the right way to go (I couldn't tell if I could associate comments with specific markers)?



I'm looking for suggestions/options from the SO crowd.



EDIT: Maybe MP4 + XMP?



Find the answer here

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