Ben McCann

Co-founder at Connectifier.
ex-Googler. CMU alum.

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Extracting AMR Audio from Android 3GP Files


The Android MediaRecorder currently records audio in AMR format and stores that within a 3GP container which provides metadata for the recording. Thanks to Sebastian Annies at Core Media it is possible to extract the AMR audio from the 3GP file using isobox4j. If you can’t play .amr files on your Windows machine, then I Read More

Android Audio Recording Tutorial


After many hours of trying to record audio on my Google Android device, I’ve finally arrived at a workable solution.  There were a few bumps along the way besides the horribly out of date MediaRecorder documentation, which was sorely lacking details.  For one, I could only get audio to record to the SD card.  Additionally, Read More