mediacodec

I'm trying to get video raw data by Preview, get audio raw data by AudioRecord. Then I will send them to MediaCodec(I will set two Codec instance). After that I will send the video data and audio data to MediaMux to get a mp4 file. I have two questions: 1) I've used MediaMux to process the video data before. For video data, the MediaMux process it by frame, but the video record is continuous. How could the MediaMux handle the video and audio in synchronization. 2) I found only of variable for inputbuffer in the function writeSampleData . A nice guy on StackOverflow also provided a demo of

[Android 进阶]MediaCodec简介 由于前段时间单位处理过录屏直播之类的需求，这边首推的一个系列着力于MediaCodec，该系列包含下面几片文章： [Android 进阶]MediaCodec系列之MediaCodec简介 [Android 进阶]MediaCodec系列之MediaCodec＋MediaEctractor播放器 [Android 进阶]MediaCodec＋MediaProjection实现录制屏幕 [Android 进阶]MediaCodec＋Camera API实现摄像头录制视频(上) [Android 进阶]MediaCodec＋Camera API实现摄像头录制视频(下) 本篇文章是Google官方文档的翻译，其中生命周期的概念是我重新整理过的，原文地址： https://developer.android.google.cn/reference/android/media/MediaCodec.html MediaCodec是用来访问系统底层编解码器的一个类，通常与MediaExtractor, MediaSync, MediaMuxer, MediaCrypto, MediaDrm, Image, Surface, AudioTrack等一起使用。作为与底层编解码器交流的工作类，MediaCodec的一般数据流图如下[官网图]：

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 am working on a video conferencing project. My video display is using surface view. Now during a video call there is a chance of aspect ratio change for the incoming frames. So i have tried the following code for it public void surfaceResize() { // WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); Point size = new Point(); int screenWidth = 0; //Get the SurfaceView layout parameters float aspectRatio = (float) recv_frame_width / recv_frame_height; if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { //Get the width of

So, In my application, I am able to show effects(like blur filter, gaussian) to video that comes from Camera using GPUImage library. Basically, I (library) will take the input from the Camera, get's the raw byte data, converts it into RGBA format from YUV format, then applies effects to this image and displays on the Surface of GLSurfaceView using OpenGL. finally, to the user, it looks like a video with effects applied. Now I want to record the frames of Surface as a video using MediaCodec API. but this discussion says that we can not pass a predefined Surface to the MediaCodec . I have seen

I'm trying to get all frames from video file using MediaCodec. If I try display video on SurfaceView, everything is ok. But if surface is null, and when I try get Bitmap from byte array, alwaus get null or runtime exception. This is my code: private class PlayerThread extends Thread { private MediaExtractor extractor; private MediaCodec decoder; private Surface surface; public PlayerThread(Surface surface) { this.surface = surface; } @Override public void run() { extractor = new MediaExtractor(); extractor.setDataSource(videoPath); for (int i = 0; i < extractor.getTrackCount(); i++) {

I am looking for a way to "compress" an mp4 video. To achieve this, I want to reduce the resolution of the video and / or reduce FPS. After long research, I think the way to do it is to use MediaCodec and related APIs as follows : -> MediaExtractor to extract encoded media data from a mp4 file. -> MediaCodec (Decoder): Decode each frame for later processing. -> MediaCodec (Encoder): At this point, I guess that's where we should establish MediaFormat parameters such as video resolution, which should help us to reduce the final size of the mp4 file. -> MediaMuxer for generate mp4 file (MinSDK 18