mediaextractor

I am trying to play an mp3 stream using MediaExtractor/MediaCodec. MediaPlayer is out of the question due to latency and long buffer size. The only sample code i have found is this: http://dpsm.wordpress.com/category/android/ The code samples are only parcial (?) and use a File instead of a stream. I have been trying to adapt this example to play an Audio Stream but i can't get my head around how this is supposed to work. The Android documentation as usual is no help. I understand that first we get information about the stream, presumably setup the AudioTrack with this information ( code

I'm writing an APP that can encode video by camera input and process video by decode-edit-encode steps. For the camera, I use the Camera class rather than Intent to configure the details settings of the camera. Then I feed the camera frames to the encoder (MediaCodec in API 16) and the muxer (I use ffmpeg muxer since I want to work on 4.1 Devices). I measure the time code of camera frames by system nano time, and select a subset of frames to fit a desired FPS (currently 15). There are some small "noises" in the time values, for example (in ms): 0, 60718, 135246, 201049, ... rather than 0,

I am trying to implement https://android.googlesource.com/platform/cts/+/jb-mr2-release/tests/tests/media/src/android/media/cts/DecodeEditEncodeTest.java but modifying the source by using a video file mp4. The mime tipe is video/avc, bitrate 288kbps, iframeinterval 100, width: 176, height: 144. The file size is 6MB. When I decode the video and put the frame in the outputsurface, I can save the frame to a bitmap and see the frame great. But at the end, after encoding (with the same parameters of the original video), I get a 700kb file and I cannot see the video (may be a corrupted file).

I performed some simple timing of MoviePlayer.java in the Grafika MediaCodec sample code running on a Nexus 5. I put a log statement at these locations: At line 203 just before decoder.queueInputBuffer At line 244 after decoder.dequeueOutputBuffer I correlated the log statements using presentationTimeUs . Here is an excerpt from logcat: 01-29 10:56:43.295: I/Grafika(21286): queueInputBuffer index/pts, 2,0 01-29 10:56:43.305: I/Grafika(21286): queueInputBuffer index/pts, 0,33100 01-29 10:56:43.315: I/Grafika(21286): queueInputBuffer index/pts, 3,66466 01-29 10:56:43.325: I/Grafika(21286):

I'm trying to get the following MediaExtractor example to work: http://bigflake.com/mediacodec/ - ExtractMpegFramesTest.java (requires 4.1, API 16) The problem I have is that outputSurface.awaitNewImage(); seems to always throw RuntimeException("frame wait timed out"), which is thrown whenever the mFrameSyncObject.wait(TIMEOUT_MS) call times out. No matter what I set TIMEOUT_MS to be, onFrameAvailable() always gets called right after the timeout occurs. I tried with 50ms and with 30000ms and it's the same. It seems like the onFrameAvailable() call can't be done while the thread is busy, and