I've figured out how to extract the AMR audio from the 3GP file:
http://www.benmccann.com/dev-blog/extracting-amr-audio-from-android-3gp-files/
On Mar 14, 9:16 pm, benmccann wrote:
> I played with ISO parser a bit more today, and made some progress. I
> made a single 3gp audio recording on my
I played with ISO parser a bit more today, and made some progress. I
made a single 3gp audio recording on my Android device and ISO parser
seems to be telling me that it is 5 boxes and 3 tracks, which I don't
really understand.
When I print the results of IsoFile.getBoxes() :
File Type Box: 3gp4
Thanks Warwick. That's basically what I got from Wikipedia, though
I'm still not sure the advantage a media container provides. It
enables streaming or has some other advantage?
I checked out and built the IsoParser, but can't figure out what to
pass to getTrack(long trackId). I'm not familiar
Ben,
I found some Java code that can parse an mp4 or 3gp file. I am using
it to extract an AMR audio stream from the file.
https://contributions.coremedia.com/isobox4j/wiki/IsoParser
Look at IsoFile.getTrack to get the raw AMR samples and then stick an
AMR header on the front of the data.
3gp
There are no public classes for decoding AMR to raw PCM. 3GPP is just
a thin wrapper around the raw AMR stream.
On Mar 13, 4:01 pm, benmccann wrote:
> Any ideas on the easiest way to get the raw data from a file recorded
> by the MediaRecorder class? I am going to have to pull up the RFC and
>
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