我正在开发一个屏幕共享应用，试图从 socket 接收原始的 H264 视频流，并使用 MediaCodec 类进行解码，通过 surfaceview 进行显示。然而，我已经成功地能够接收数据并在 surface 上显示。但是，我遇到了一个问题，也就是视频非常卡顿、抖动并且有绿色条纹和斑块。您可以在 YouTube 的 视频链接 中看到这个问题。如果我将该视频保存到 SD 卡上，并使用 MxPlayer 播放，则一切正常。我还尝试了 Gstreamer，一切都很好。
这是我从 Activity 调用的类，当 surfaceview 创建时会调用此类。
但视频质量与在YouTube分享的视频相同。
//New Edited Code
public class Server {
static final int socketServerPORT = 53515;
MainActivity activity;
ServerSocket serverSocket;
public Server(MainActivity activity, Surface surface) {
Log.e("constructor()", "called");
this.activity = activity;
Thread socketServerThread = new Thread(new SocketServerThread(surface));
socketServerThread.start();
}
private static MediaCodecInfo selectCodec(String mimeType) {
int numCodecs = MediaCodecList.getCodecCount();
for (int i = 0; i < numCodecs; i++) {
MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
if (codecInfo.isEncoder()) {
continue;
}
String[] types = codecInfo.getSupportedTypes();
for (int j = 0; j < types.length; j++) {
if (types[j].equalsIgnoreCase(mimeType)) {
Log.e("codecinfo", codecInfo.getName());
return codecInfo;
}
}
}
return null;
}
private class SocketServerThread extends Thread {
InputStream is;
Socket socket;
private MediaCodec codec;
private Surface surface;
public SocketServerThread(Surface surface) {
this.surface = surface;
}
@Override
public void run() {
Log.e("socketthread", "called");
try {
selectCodec("video/avc");
codec = MediaCodec.createByCodecName(selectCodec("video/avc").getName());
MediaFormat format = MediaFormat.createVideoFormat("video/avc", 800, 480);
// format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, 1024000);
format.setInteger(MediaFormat.KEY_FRAME_RATE, 25);
codec.configure(format, surface, null, 0);
codec.start();
serverSocket = new ServerSocket(socketServerPORT);
while (true) {
socket = serverSocket.accept();
Log.e("connection", "accepted");
is = socket.getInputStream();
if (is != null) {
// File file = new File(Environment.getExternalStorageDirectory() + "/stream.mp4");
// OutputStream output = new FileOutputStream(file);
byte[] buff = new byte[4 * 1024]; // or other buffer size
int read;
while ((read = is.read(buff)) != -1) {
// output.write(buff, 0, read);
if (buff.length == 1)
continue;
int inIndex = codec.dequeueInputBuffer(10000);
if (inIndex >= 0) {
ByteBuffer inputBuffer = codec.getInputBuffer(inIndex);
inputBuffer.clear();
inputBuffer.put(buff);
codec.queueInputBuffer(inIndex, 0, buff.length, 16, 0);
}
MediaCodec.BufferInfo buffInfo = new MediaCodec.BufferInfo();
int outIndex = codec.dequeueOutputBuffer(buffInfo, 10000);
switch (outIndex) {
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
break;
case -3:
break;
default:
codec.releaseOutputBuffer(outIndex, true);
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (codec != null) {
codec.release();
}
if (socket != null) {
try {
socket.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
}
我尝试了你提到的方法来创建MediaCodec
MediaCodec.createByCodecName(selectCodec("video/avc").getName());
private static MediaCodecInfo selectCodec(String mimeType) {
int numCodecs = MediaCodecList.getCodecCount();
for (int i = 0; i < numCodecs; i++) {
MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
if (!codecInfo.isEncoder()) {
continue;
}
String[] types = codecInfo.getSupportedTypes();
for (int j = 0; j < types.length; j++) {
if (types[j].equalsIgnoreCase(mimeType)) {
Log.e("codecinfo",codecInfo.getName());
return codecInfo;
}
}
}
return null;
}
但是它给我报错了
I/OMXClient: MuxOMX ctor
I/MediaCodec: [OMX.qcom.video.encoder.avc] setting surface generation to 28345345
W/ACodec: [OMX.qcom.video.encoder.avc] Failed to set standard component role 'video_decoder.avc'.
E/ACodec: [OMX.qcom.video.encoder.avc] configureCodec returning error -1010
E/ACodec: signalError(omxError 0x80001001, internalError -1010)
E/MediaCodec: Codec reported err 0xfffffc0e, actionCode 0, while in state 3
E/MediaCodec: configure failed with err 0xfffffc0e, resetting...
I/OMXClient: MuxOMX ctor
E/AndroidRuntime: FATAL EXCEPTION: Thread-5
Process: com.androidsrc.server, PID: 27681
android.media.MediaCodec$CodecException: Error 0xfffffc0e
at android.media.MediaCodec.configure(MediaCodec.java:1884)
at com.androidsrc.server.Server$SocketServerThread.run(Server.java:70)
at java.lang.Thread.run(Thread.java:761)
我之前尝试使用这种方式创建Mediacodec
codec = MediaCodec.createDecoderByType("video/avc");
但视频质量与在YouTube分享的视频相同。