一、如下相关网址1~4为普通播放视频方式
相关网址：
二、如果需要获取视频播放的每一帧，可以采用MediaCodec
MediaCodec分两种情况：
直接绘制到绑定的surface(suface view)上。
获取解码后的每帧图像(ByteBuffer或Image)，可以进行解析或将Image绘制到view上。
第二种情况 sample code:
import android.media.MediaCodec;
import android.media.MediaExtractor;
import android.media.MediaFormat;
...
// start video decode in some function
if (mplayer == null) {
mplayer = new PlayerThread(syncToken_, this, appParentPath);
mplayer.start();
}
...
private class MediaPlayerThread extends Thread {
private MediaExtractor extractor;
private MediaCodec decoder;
public MediaPlayerThread() {
}
@Override
public void run() {
while (!Thread.interrupted()) {
extractor = new MediaExtractor();
try {
extractor.setDataSource("video.mp4"); // "video.MOV"
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; i < extractor.getTrackCount(); i++) {
MediaFormat format = extractor.getTrackFormat(i);
String mime = format.getString(MediaFormat.KEY_MIME);
if (mime.startsWith("video/")) {
extractor.selectTrack(i);
try {
decoder = MediaCodec.createDecoderByType(mime);
decoder.configure(format, null, null, 0);
} catch (IOException e) {
e.printStackTrace();
Log.e("MediaPlayer", "Can't find video info!");
return;
}
break;
}
}
decoder.start();
ByteBuffer[] inputBuffers = decoder.getInputBuffers();
ByteBuffer[] outputBuffers = decoder.getOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
boolean isEOS = false;
while (!Thread.interrupted()) {
if (!isEOS) {
int inIndex = decoder.dequeueInputBuffer(10000);
if (inIndex >= 0) {
ByteBuffer buffer = inputBuffers[inIndex];
int sampleSize = extractor.readSampleData(buffer, 0);
if (sampleSize < 0) {
// We shouldn't stop the playback at this point, just pass the EOS
// flag to decoder, we will get it again from the
// dequeueOutputBuffer
Log.d("MediaPlayer", "InputBuffer BUFFER_FLAG_END_OF_STREAM");
decoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
isEOS = true;
} else {
decoder.queueInputBuffer(inIndex, 0, sampleSize, extractor.getSampleTime(), 0);
extractor.advance();
}
}
}
int outIndex = decoder.dequeueOutputBuffer(info, 10000);
switch (outIndex) {
case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:
Log.d("MediaPlayer", "INFO_OUTPUT_BUFFERS_CHANGED");
outputBuffers = decoder.getOutputBuffers();
break;
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
Log.d("MediaPlayer", "New format " + decoder.getOutputFormat());
// New format {image-data=java.nio.ByteArrayBuffer[position=0,limit=80,capacity=80], crop-top=0, crop-right=1279, color-format=21, vqzip-level=0, height=720, crop-left=0, stride=1280, mime=video/raw, vqzip-entropy=-36, slice-height=720, width=1280, what=1869968451, vqzip-profile=1382400, crop-bottom=719}
// color-format=21: COLOR_FormatYUV420SemiPlanar yuv420sp(NV21)
MediaFormat fmt = decoder.getOutputFormat();
//invoke fmt.getInteger("width") to get frame width
//invoke fmt.getInteger("height") to get frame height
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
Log.d("MediaPlayer", "dequeueOutputBuffer timed out!");
break;
default:
ByteBuffer buffer = outputBuffers[outIndex];
Log.v("MediaPlayer", "frame buffer " + buffer);
if (buffer.limit() > 0) {
// duplicate frame buffer
byte[] fBuff = new byte[buffer.limit()];
buffer.get(fBuff);
// TODO: pass "fBuff" to some function
...
}
decoder.releaseOutputBuffer(outIndex, false);
break;
}
// All decoded frames have been rendered, we can stop playing now
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
Log.d("MediaPlayer", "OutputBuffer BUFFER_FLAG_END_OF_STREAM");
break;
}
}
decoder.stop();
decoder.release();
extractor.release();
}
}
}
相关网址：