jonbool / hwencoderexperiments

Deprecated ( See https://github.com/Kickflip/kickflip-android-sdk for my current work). Experiments with Android 4.3's MediaCodec and MediaMuxer

HWEncoderExperiments

Herein lies experiments with Android 4.3's MediaCodec and MediaMuxer APIs.

The master branch is concerned with simultaneously producing a single high quality .mp4 as well as gapless 5 second chunk mp4s. The end goal is to allow an Android device to act as an HLS / MPEG-DASH server.

The audioonly branch shows a barebones example encoding AAC audio with Android's AudioRecord class.

Output

Output is stored in '/sdcard/HWEncodingExperiments' in or internal storage if /sdcard isn't available.

Output location is modified via FileUtils.OUTPUT_DIR and FileUtils.createTempFileInRootAppStorage.

Note on ColorFormats

This example doesn't yet intelligenty check for available color formats. If you experience a crash on MediaCodec.configure, try changing the appropriate part of ChunkedAvcEncoder.prepare():

private void prepare() {
…
  videoFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar);
  // On devices without a TI SOC, try:
  // COLOR_FormatYUV420PackedSemiPlanar
…
}