android.media.MediaExtractor.selectTrack()方法的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中android.media.MediaExtractor.selectTrack()方法的一些代码示例，展示了MediaExtractor.selectTrack()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。MediaExtractor.selectTrack()方法的具体详情如下：
包路径：android.media.MediaExtractor
类名称：MediaExtractor
方法名：selectTrack

MediaExtractor.selectTrack介绍

暂无

代码示例

代码示例来源：origin: TeamNewPipe/NewPipe

private MediaExtractor getMediaExtractor(FileInputStream source, long offset, long length) throws IOException {
    MediaExtractor extractor = new MediaExtractor();
    extractor.setDataSource(source.getFD(), offset, length);
    extractor.selectTrack(0);

    return extractor;
  }
}

代码示例来源：origin: guoxiaoxing/phoenix

private void setupTrackTranscoders(MediaFormatStrategy formatStrategy) {
  MediaExtractorUtils.TrackResult trackResult = MediaExtractorUtils.getFirstVideoAndAudioTrack(mExtractor);
  MediaFormat videoOutputFormat = formatStrategy.createVideoOutputFormat(trackResult.mVideoTrackFormat);
  MediaFormat audioOutputFormat = formatStrategy.createAudioOutputFormat(trackResult.mAudioTrackFormat);
  if (videoOutputFormat == null && audioOutputFormat == null) {
    throw new InvalidOutputFormatException("MediaFormatStrategy returned pass-through for both video and audio. No transcoding is necessary.");
  }
  QueuedMuxer queuedMuxer = new QueuedMuxer(mMuxer, new QueuedMuxer.Listener() {
    @Override
    public void onDetermineOutputFormat() {
      MediaFormatValidator.validateVideoOutputFormat(mVideoTrackTranscoder.getDeterminedFormat());
      MediaFormatValidator.validateAudioOutputFormat(mAudioTrackTranscoder.getDeterminedFormat());
    }
  });
  if (videoOutputFormat == null) {
    mVideoTrackTranscoder = new PassThroughTrackTranscoder(mExtractor, trackResult.mVideoTrackIndex, queuedMuxer, QueuedMuxer.SampleType.VIDEO);
  } else {
    mVideoTrackTranscoder = new VideoTrackTranscoder(mExtractor, trackResult.mVideoTrackIndex, videoOutputFormat, queuedMuxer);
  }
  mVideoTrackTranscoder.setup();
  if (audioOutputFormat == null) {
    mAudioTrackTranscoder = new PassThroughTrackTranscoder(mExtractor, trackResult.mAudioTrackIndex, queuedMuxer, QueuedMuxer.SampleType.AUDIO);
  } else {
    mAudioTrackTranscoder = new AudioTrackTranscoder(mExtractor, trackResult.mAudioTrackIndex, audioOutputFormat, queuedMuxer);
  }
  mAudioTrackTranscoder.setup();
  mExtractor.selectTrack(trackResult.mVideoTrackIndex);
  mExtractor.selectTrack(trackResult.mAudioTrackIndex);
}

代码示例来源：origin: guoxiaoxing/phoenix

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mEncoder.configure(mOutputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  mEncoder.start();
  mEncoderStarted = true;
  mEncoderBuffers = new MediaCodecBufferCompatWrapper(mEncoder);
  final MediaFormat inputFormat = mExtractor.getTrackFormat(mTrackIndex);
  try {
    mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mDecoder.configure(inputFormat, null, null, 0);
  mDecoder.start();
  mDecoderStarted = true;
  mDecoderBuffers = new MediaCodecBufferCompatWrapper(mDecoder);
  mAudioChannel = new AudioChannel(mDecoder, mEncoder, mOutputFormat);
}

代码示例来源：origin: guoxiaoxing/phoenix

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));

代码示例来源：origin: saki4510t/libcommon

public void restart() {
  if (DEBUG) Log.v(TAG, "restart:");
  if (mState == STATE_WAIT) {
    synchronized (mSync) {
      mMediaExtractor.unselectTrack(mTrackIndex);
      mMediaExtractor.selectTrack(mTrackIndex);
      mState = STATE_PLAYING;
      mSync.notifyAll();
    }
  }
}

代码示例来源：origin: stackoverflow.com

MediaExtractor extractor= new MediaExtractor();
File file = new File(this.fileName);

extractor.setDataSource(this.fileName);
int tracks = extractor.getTrackCount();

extractor.selectTrack(0); ..

代码示例来源：origin: bitmovin/bitcodin-android-demo

@Override
public void enable(int track, long positionUs) {
 Assertions.checkState(prepared);
 Assertions.checkState(trackStates[track] == TRACK_STATE_DISABLED);
 trackStates[track] = TRACK_STATE_ENABLED;
 extractor.selectTrack(track);
 seekToUsInternal(positionUs, positionUs != 0);
}

代码示例来源：origin: aserbao/AndroidCamera

private int getAndSelectAudioTrackIndex(MediaExtractor extractor) {
  for (int index = 0; index < extractor.getTrackCount(); ++index) {
    if (VERBOSE) {
      Log.d(TAG, "format for track " + index + " is "
          + getMimeTypeFor(extractor.getTrackFormat(index)));
    }
    if (isAudioFormat(extractor.getTrackFormat(index))) {
      extractor.selectTrack(index);
      return index;
    }
  }
  return -1;
}

代码示例来源：origin: aserbao/AndroidCamera

private int getAndSelectVideoTrackIndex(MediaExtractor extractor) {
  for (int index = 0; index < extractor.getTrackCount(); ++index) {
    if (VERBOSE) {
      Log.d(TAG, "format for track " + index + " is "
          + getMimeTypeFor(extractor.getTrackFormat(index)));
    }
    if (isVideoFormat(extractor.getTrackFormat(index))) {
      extractor.selectTrack(index);
      return index;
    }
  }
  return -1;
}

代码示例来源：origin: yangjie10930/OpenGL4Android

private boolean audioDecodeStep(ByteBuffer buffer) {
  boolean isTimeEnd = false;
  buffer.clear();
  synchronized (Extractor_LOCK) {
    mExtractor.selectTrack(mAudioDecoderTrack);
    int length = mExtractor.readSampleData(buffer, 0);
    if (length != -1) {
      int flags = mExtractor.getSampleFlags();
      mAudioEncoderBufferInfo.size = length;
      mAudioEncoderBufferInfo.flags = flags;
      mAudioEncoderBufferInfo.presentationTimeUs = mExtractor.getSampleTime();
      mAudioEncoderBufferInfo.offset = 0;
      isTimeEnd = mExtractor.getSampleTime() >= mVideoStopTimeStamp;
      mMuxer.writeSampleData(mAudioEncoderTrack, buffer, mAudioEncoderBufferInfo);
    }
    isAudioExtractorEnd = !mExtractor.advance();
  }
  return isAudioExtractorEnd || isTimeEnd;
}

代码示例来源：origin: lijundacom/AndroidRTSPLib2

public MP4Encorder(Session session){
  mediaExtractor = new MediaExtractor();
  try {
    mediaExtractor.setDataSource(session.getVideoPath());
  } catch (IOException e) {
    e.printStackTrace();
  }
  for(int i = 0; i < mediaExtractor.getTrackCount(); i++) {
    MediaFormat format = mediaExtractor.getTrackFormat(i);
    String mime = format.getString(MediaFormat.KEY_MIME);
    if (!mime.startsWith("video/")) {
      continue;
    }
    framerate = format.getInteger(MediaFormat.KEY_FRAME_RATE);
    mediaExtractor.selectTrack(i);
    session.getVideoQuality().setmFrameRate(framerate);
  }
}

代码示例来源：origin: pedroSG94/rtmp-rtsp-stream-client-java

public boolean initExtractor(String filePath) throws IOException {
 decoding = false;
 videoExtractor = new MediaExtractor();
 videoExtractor.setDataSource(filePath);
 for (int i = 0; i < videoExtractor.getTrackCount() && !mime.startsWith("video/"); i++) {
  videoFormat = videoExtractor.getTrackFormat(i);
  mime = videoFormat.getString(MediaFormat.KEY_MIME);
  if (mime.startsWith("video/")) {
   videoExtractor.selectTrack(i);
  } else {
   videoFormat = null;
  }
 }
 if (videoFormat != null) {
  width = videoFormat.getInteger(MediaFormat.KEY_WIDTH);
  height = videoFormat.getInteger(MediaFormat.KEY_HEIGHT);
  duration = videoFormat.getLong(MediaFormat.KEY_DURATION);
  return true;
  //video decoder not supported
 } else {
  mime = "";
  videoFormat = null;
  return false;
 }
}

代码示例来源：origin: pedroSG94/rtmp-rtsp-stream-client-java

public boolean initExtractor(String filePath) throws IOException {
 decoding = false;
 audioExtractor = new MediaExtractor();
 audioExtractor.setDataSource(filePath);
 for (int i = 0; i < audioExtractor.getTrackCount() && !mime.startsWith("audio/"); i++) {
  audioFormat = audioExtractor.getTrackFormat(i);
  mime = audioFormat.getString(MediaFormat.KEY_MIME);
  if (mime.startsWith("audio/")) {
   audioExtractor.selectTrack(i);
  } else {
   audioFormat = null;
  }
 }
 if (audioFormat != null) {
  isStereo = (audioFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT) == 2);
  sampleRate = audioFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE);
  duration = audioFormat.getLong(MediaFormat.KEY_DURATION);
  return true;
  //audio decoder not supported
 } else {
  mime = "";
  audioFormat = null;
  return false;
 }
}

代码示例来源：origin: ypresto/android-transcoder

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mEncoder.configure(mOutputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  mEncoder.start();
  mEncoderStarted = true;
  mEncoderBuffers = new MediaCodecBufferCompatWrapper(mEncoder);
  final MediaFormat inputFormat = mExtractor.getTrackFormat(mTrackIndex);
  try {
    mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mDecoder.configure(inputFormat, null, null, 0);
  mDecoder.start();
  mDecoderStarted = true;
  mDecoderBuffers = new MediaCodecBufferCompatWrapper(mDecoder);
  mAudioChannel = new AudioChannel(mDecoder, mEncoder, mOutputFormat);
}

代码示例来源：origin: windrunnerlihuan/DogCamera

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mEncoder.configure(mOutputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  mEncoder.start();
  mEncoderStarted = true;
  mEncoderBuffers = new MediaCodecBufferCompatWrapper(mEncoder);
  final MediaFormat inputFormat = mExtractor.getTrackFormat(mTrackIndex);
  try {
    mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mDecoder.configure(inputFormat, null, null, 0);
  mDecoder.start();
  mDecoderStarted = true;
  mDecoderBuffers = new MediaCodecBufferCompatWrapper(mDecoder);
  mAudioChannel = new AudioChannel(mDecoder, mEncoder, mOutputFormat);
}

代码示例来源：origin: GoBelieveIO/im_android

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mEncoder.configure(mOutputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  mEncoder.start();
  mEncoderStarted = true;
  mEncoderBuffers = new MediaCodecBufferCompatWrapper(mEncoder);
  final MediaFormat inputFormat = mExtractor.getTrackFormat(mTrackIndex);
  try {
    mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mDecoder.configure(inputFormat, null, null, 0);
  mDecoder.start();
  mDecoderStarted = true;
  mDecoderBuffers = new MediaCodecBufferCompatWrapper(mDecoder);
  mAudioChannel = new AudioChannel(mDecoder, mEncoder, mOutputFormat);
}

代码示例来源：origin: MasayukiSuda/Mp4Composer-android

@Override
public void setup() {
  extractor.selectTrack(trackIndex);
  try {
    encoder = MediaCodec.createEncoderByType(outputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  encoder.configure(outputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  encoder.start();
  encoderStarted = true;
  encoderBuffers = new MediaCodecBufferCompatWrapper(encoder);
  final MediaFormat inputFormat = extractor.getTrackFormat(trackIndex);
  try {
    decoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  decoder.configure(inputFormat, null, null, 0);
  decoder.start();
  decoderStarted = true;
  decoderBuffers = new MediaCodecBufferCompatWrapper(decoder);
  audioChannel = new AudioChannel(decoder, encoder, outputFormat);
}

代码示例来源：origin: stackoverflow.com

MediaExtractor extractor = new MediaExtractor();
extractor.setDataSource(...);
int numTracks = extractor.getTrackCount();
for (int i = 0; i < numTracks; ++i) {
 MediaFormat format = extractor.getTrackFormat(i);
 String mime = format.getString(MediaFormat.KEY_MIME);
 if (weAreInterestedInThisTrack) {
  extractor.selectTrack(i);
 }
}
ByteBuffer inputBuffer = ByteBuffer.allocate(...)
while (extractor.readSampleData(inputBuffer, ...) >= 0) {
 int trackIndex = extractor.getSampleTrackIndex();
 long presentationTimeUs = extractor.getSampleTime();
 ...
 extractor.advance();
}
extractor.release();
extractor = null;

代码示例来源：origin: kriztan/Pix-Art-Messenger

@Override
public void setup() {
  mExtractor.selectTrack(mTrackIndex);
  try {
    mEncoder = MediaCodec.createEncoderByType(mOutputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mEncoder.configure(mOutputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  mEncoder.start();
  mEncoderStarted = true;
  mEncoderBuffers = new MediaCodecBufferCompatWrapper(mEncoder);
  final MediaFormat inputFormat = mExtractor.getTrackFormat(mTrackIndex);
  try {
    mDecoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  mDecoder.configure(inputFormat, null, null, 0);
  mDecoder.start();
  mDecoderStarted = true;
  mDecoderBuffers = new MediaCodecBufferCompatWrapper(mDecoder);
  mAudioChannel = new AudioChannel(mDecoder, mEncoder, mOutputFormat);
}

代码示例来源：origin: MasayukiSuda/GPUVideo-android

@Override
public void setup() {
  extractor.selectTrack(trackIndex);
  try {
    encoder = MediaCodec.createEncoderByType(outputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  encoder.configure(outputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
  encoder.start();
  encoderStarted = true;
  encoderBuffers = new MediaCodecBufferCompatWrapper(encoder);
  final MediaFormat inputFormat = extractor.getTrackFormat(trackIndex);
  try {
    decoder = MediaCodec.createDecoderByType(inputFormat.getString(MediaFormat.KEY_MIME));
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
  decoder.configure(inputFormat, null, null, 0);
  decoder.start();
  decoderStarted = true;
  decoderBuffers = new MediaCodecBufferCompatWrapper(decoder);
  audioChannel = new AudioChannel(decoder, encoder, outputFormat);
}

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