I would like to be able to extract frequency/amplitude info from incoming mic audio. From looking at previous posts, it looks like the way to do this with the current sdk is to write to a file, then tail that file. This means I need to be able to extract frequency/ amplitude information from .mp4 or 3gpp files, since these are the audio formats supported by MediaRecorder. Now, I'd really prefer not to have to decode this data by hand. :) MediaPlayer is obviously decoding the .mp4 files, so I was wondering if there is any way to tap into this functionality, or some other way to get my .mp4 files decoded? Thanks!
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