http://blog.csdn.net/dahuaishu2010_/article/details/14103299

 

MediaCodec Demo

标签： 多媒体Android

2013-11-03 11:45 2251人阅读 评论(3) 收藏 举报

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android基础、高级、源码开发、游戏开发。。。。（24） 

public class AvcEncoder {private MediaCodec mediaCodec;private BufferedOutputStream outputStream;public AvcEncoder() {     File f = new File(Environment.getExternalStorageDirectory(), "Download/video_encoded.264");    touch (f);    try {        outputStream = new BufferedOutputStream(new FileOutputStream(f));        Log.i("AvcEncoder", "outputStream initialized");    } catch (Exception e){         e.printStackTrace();    }    mediaCodec = MediaCodec.createEncoderByType("video/avc");    MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc", 320, 240);    mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 125000);    mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 15);    mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);    mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);    mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);    mediaCodec.start();}public void close() {    try {        mediaCodec.stop();        mediaCodec.release();        outputStream.flush();        outputStream.close();    } catch (Exception e){         e.printStackTrace();    }}// called from Camera.setPreviewCallbackWithBuffer(...) in other classpublic void offerEncoder(byte[] input) {    try {        ByteBuffer[] inputBuffers = mediaCodec.getInputBuffers();        ByteBuffer[] outputBuffers = mediaCodec.getOutputBuffers();        int inputBufferIndex = mediaCodec.dequeueInputBuffer(-1);        if (inputBufferIndex >= 0) {            ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];            inputBuffer.clear();            inputBuffer.put(input);            mediaCodec.queueInputBuffer(inputBufferIndex, 0, input.length, 0, 0);        }        MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();        int outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo,0);        while (outputBufferIndex >= 0) {            ByteBuffer outputBuffer = outputBuffers[outputBufferIndex];            byte[] outData = new byte[bufferInfo.size];            outputBuffer.get(outData);            outputStream.write(outData, 0, outData.length);            Log.i("AvcEncoder", outData.length + " bytes written");            mediaCodec.releaseOutputBuffer(outputBufferIndex, false);            outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, 0);        }    } catch (Throwable t) {        t.printStackTrace();    }}

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