Android: Save Mediarecorder-Stream as playable file

Question

I want to record videos with my android device (Nexus 10) and upload it later to youtube.

So far I'am recording with the android MediaRecoder and stream it via LocalSocket to save the data to multiple files. But the files are not playable.

I read some articles that sine API-Level 18 it is possible to convert files with MediaCodec and/or MediaMuxer. And i found this this code, but i do not really understand how to handle it.

Has anybody an easy example which shows how to convert the raw data from the LocalSocket to a playable file (i.e. mp4 files)?

My MediaRecoder looks like this:

recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
camcorderProfile_HQ.fileFormat = MediaRecorder.OutputFormat.MPEG_4;
camcorderProfile_HQ.videoCodec = MediaRecorder.VideoEncoder.MPEG_4_SP;
recorder.setProfile(camcorderProfile_HQ);
recorder.setPreviewDisplay(surfaceHolder.getSurface());
clientSocket = new LocalSocket();
clientSocket.connect(new LocalSocketAddress(SOCKET_ADDRESS));
recorder.setOutputFile(clientSocket.getFileDescriptor());
recorder.prepare();
recorder.start();

Thanks in advance.

Answer 1

I don't think you can do it like that. Writing to a mp4 muxed file requires the file descriptor to be seekable. Unix sockets are not. This is probably because muxing to mp4 commonly requires the muxer to seek back and forth to write indices etc... and that cannot be done on local sockets.

If you can't simply output to file and then copy it, this might be very interesting for you: http://hello-qd.blogspot.it/2013/05/how-to-process-mediarecorder-frames.html.