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  3. android.media.MediaExtractor

Java 类android.media.MediaExtractor 实例源码

项目：grid-video-viewer    文件：DecodeThread.java    
private MediaFormat selectTrack(MediaExtractor extractor) {
    int trackCount = extractor.getTrackCount();
    Log.d(TAG, "trackCount :" + trackCount);

    MediaFormat format;
    for (int i = 0; i < trackCount; i++) {
        extractor.selectTrack(i);
        format = extractor.getTrackFormat(i);
        Log.d(TAG, "Track media format :" + format.toString());

        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            return format;
        }
    }

    return null;
}
项目：airgram    文件：MediaController.java    
@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}
项目：Hotspot-master-devp    文件：AudioTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }

    final int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }

    final int sampleSize = mExtractor.readSampleData(mDecoderBuffers.getInputBuffer(result), 0);
    final boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}
项目：Hotspot-master-devp    文件：VideoTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }
    int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }
    int sampleSize = mExtractor.readSampleData(mDecoderInputBuffers[result], 0);
    boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}
项目：Hotspot-master-devp    文件：MediaExtractorUtils.java    
public static TrackResult getFirstVideoAndAudioTrack(MediaExtractor extractor) {
    TrackResult trackResult = new TrackResult();
    trackResult.mVideoTrackIndex = -1;
    trackResult.mAudioTrackIndex = -1;
    int trackCount = extractor.getTrackCount();
    for (int i = 0; i < trackCount; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (trackResult.mVideoTrackIndex < 0 && mime.startsWith("video/")) {
            trackResult.mVideoTrackIndex = i;
            trackResult.mVideoTrackMime = mime;
            trackResult.mVideoTrackFormat = format;
        } else if (trackResult.mAudioTrackIndex < 0 && mime.startsWith("audio/")) {
            trackResult.mAudioTrackIndex = i;
            trackResult.mAudioTrackMime = mime;
            trackResult.mAudioTrackFormat = format;
        }
        if (trackResult.mVideoTrackIndex >= 0 && trackResult.mAudioTrackIndex >= 0) break;
    }
    if (trackResult.mVideoTrackIndex < 0 || trackResult.mAudioTrackIndex < 0) {
        throw new IllegalArgumentException("extractor does not contain video and/or audio tracks.");
    }
    return trackResult;
}
项目：VideoApplication    文件：VideoDecoder.java    
@Override
public void startSeeking() throws IOException {
    super.startSeeking();
    Log.d(TAG, "start seeking state is: " + mState);
    if (mState == STATE_SEEKING)
        return;
    prepare();
    setState(STATE_SEEKING);
    mInputDone = mOutputDone = false;
    mSeekDirection = SEEK_DIRECTION_FORWARD;
    mMediaCodec.start();
    mSeekTargetTime = mExtractor.getSampleTime();
    mExtractor.seekTo(mSeekTargetTime, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
    mIsSeeking = true;
    new Thread(mSeekRunnable, getClass().getSimpleName()).start();
}
项目：VideoApplication    文件：VideoDecoder.java    
public void seekTo(long presentationTime) {
    synchronized (mDecoderSync) {
        if (mIsSeeking)
            return;
        Log.d(TAG, "seek diff:" + (presentationTime - mSeekTargetTime));
        mInputDone = mOutputDone = false;
        mSeekDirection = presentationTime >= mSeekTargetTime ? SEEK_DIRECTION_FORWARD : SEEK_DIRECTION_BACKWARD;
        if ((mSeekDirection == SEEK_DIRECTION_BACKWARD) || mSeekDirection == SEEK_DIRECTION_FORWARD && Math.abs(presentationTime - mLastSyncFrameTime) > mMaximumDifference) {
            mExtractor.seekTo(presentationTime, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
            mLastSyncFrameTime = mExtractor.getSampleTime();
        }
        mSeekTargetTime = presentationTime;
        mIsSeeking = true;
        mDecoderSync.notifyAll();
    }
}
项目：grid-video-viewer    文件：DecodeThread.java    
/**
 * 現在のfilePathを使ってExtractorを作成する
 */
private boolean readyExtractor(String filePath) {
    boolean isOk = false;
    mBufferinfo = new MediaCodec.BufferInfo();

    try {
        mExtractor = new MediaExtractor();
        mExtractor.setDataSource(filePath);
        isOk = true;

    } catch (IOException e) {
        e.printStackTrace();
        Log.d(TAG, "Failed to setDataSource id:" + id);
        mVideoData = null;
    }

    return isOk;
}
项目：grafika    文件：MoviePlayer.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private static int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}
项目：rtmp-rtsp-stream-client-java    文件：AudioDecoder.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 && mime.equals("audio/mp4a-latm")) {
    isStereo = (audioFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT) == 2);
    sampleRate = audioFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE);
    return true;
    //audio decoder not supported
  } else {
    mime = "";
    audioFormat = null;
    return false;
  }
}
项目：rtmp-rtsp-stream-client-java    文件：VideoDecoder.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 && mime.equals("video/avc")) {
    width = videoFormat.getInteger(MediaFormat.KEY_WIDTH);
    height = videoFormat.getInteger(MediaFormat.KEY_HEIGHT);
    return true;
    //video decoder not supported
  } else {
    mime = "";
    videoFormat = null;
    return false;
  }
}
项目：PlusGram    文件：MediaController.java    
@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}
项目：EZFilter    文件：AudioTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }

    int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }

    int sampleSize = mExtractor.readSampleData(MediaUtil.getInputBuffer(mDecoder, result), 0);
    boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}
项目：EZFilter    文件：VideoTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }

    int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }

    int sampleSize = mExtractor.readSampleData(mDecoderInputBuffers[result], 0);
    boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}
项目：Camera-Roll-Android-App    文件：Video.java    
public int retrieveFrameRate() {
    MediaExtractor extractor = new MediaExtractor();
    int frameRate = -1;
    try {
        //Adjust data source as per the requirement if file, URI, etc.
        extractor.setDataSource(getPath());
        int numTracks = extractor.getTrackCount();
        for (int i = 0; i < numTracks; i++) {
            MediaFormat format = extractor.getTrackFormat(i);
            if (format.containsKey(MediaFormat.KEY_FRAME_RATE)) {
                frameRate = format.getInteger(MediaFormat.KEY_FRAME_RATE);
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        //Release stuff
        extractor.release();
    }
    return frameRate;
}
项目：EpMedia    文件：VideoUitls.java    
/**
 * 获取视频信息
 *
 * @param url
 * @return
 */
public static long getDuration(String url) {
    try {
        MediaExtractor mediaExtractor = new MediaExtractor();
        mediaExtractor.setDataSource(url);
        int videoExt = TrackUtils.selectVideoTrack(mediaExtractor);
        if(videoExt == -1){
            videoExt = TrackUtils.selectAudioTrack(mediaExtractor);
            if(videoExt == -1){
                return 0;
            }
        }
        MediaFormat mediaFormat = mediaExtractor.getTrackFormat(videoExt);
        long res = mediaFormat.containsKey(MediaFormat.KEY_DURATION) ? mediaFormat.getLong(MediaFormat.KEY_DURATION) : 0;//时长
        mediaExtractor.release();
        return res;
    } catch (Exception e) {
        return 0;
    }
}
项目：EpMedia    文件：EpEditor.java    
/**
 * 添加背景音乐
 *
 * @param videoin          视频文件
 * @param audioin          音频文件
 * @param output           输出路径
 * @param videoVolume      视频原声音音量(例:0.7为70%)
 * @param audioVolume      背景音乐音量(例:1.5为150%)
 * @param onEditorListener 回调监听
 */
public static void music(String videoin, String audioin, String output, float videoVolume, float audioVolume, OnEditorListener onEditorListener) {
    MediaExtractor mediaExtractor = new MediaExtractor();
    try {
        mediaExtractor.setDataSource(videoin);
    } catch (IOException e) {
        e.printStackTrace();
        return;
    }
    int at = TrackUtils.selectAudioTrack(mediaExtractor);
    CmdList cmd = new CmdList();
    cmd.append("ffmpeg").append("-y").append("-i").append(videoin);
    if (at == -1) {
        int vt = TrackUtils.selectVideoTrack(mediaExtractor);
        float duration = (float) mediaExtractor.getTrackFormat(vt).getLong(MediaFormat.KEY_DURATION) / 1000 / 1000;
        cmd.append("-ss").append("0").append("-t").append(duration).append("-i").append(audioin).append("-acodec").append("copy").append("-vcodec").append("copy");
    } else {
        cmd.append("-i").append(audioin).append("-filter_complex")
                .append("[0:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=" + videoVolume + "[a0];[1:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=" + audioVolume + "[a1];[a0][a1]amix=inputs=2:duration=first[aout]")
                .append("-map").append("[aout]").append("-ac").append("2").append("-c:v")
                .append("copy").append("-map").append("0:v:0");
    }
    cmd.append(output);
    mediaExtractor.release();
    execCmd(cmd, 0, onEditorListener);
}
项目：VideoCompressor    文件：VideoController.java    
@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}
项目：libcommon    文件：MediaAudioDecoder.java    
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
protected int handlePrepare(MediaExtractor media_extractor) {
    int track_index = selectTrack(media_extractor, "audio/");
    if (track_index >= 0) {
        final MediaFormat format = media_extractor.getTrackFormat(track_index);
        mAudioChannels = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
        mAudioSampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);
        final int min_buf_size = AudioTrack.getMinBufferSize(mAudioSampleRate,
                (mAudioChannels == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO),
                AudioFormat.ENCODING_PCM_16BIT);
        final int max_input_size = format.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
        mAudioInputBufSize =  min_buf_size > 0 ? min_buf_size * mAudioChannels * 2 : max_input_size;
        if (mAudioInputBufSize > max_input_size) mAudioInputBufSize = max_input_size;
        final int frameSizeInBytes = mAudioChannels * 2;
        mAudioInputBufSize = (mAudioInputBufSize / frameSizeInBytes) * frameSizeInBytes;
        if (DEBUG) Log.v(TAG, String.format("getMinBufferSize=%d,max_input_size=%d,mAudioInputBufSize=%d",min_buf_size, max_input_size, mAudioInputBufSize));
    }
    return track_index;
}
项目：libcommon    文件：MediaMoviePlayer.java    
/**
 * @param media_extractor
 * @param trackIndex
 * @return
 */
protected MediaCodec internal_start_video(final MediaExtractor media_extractor, final int trackIndex) {
    if (DEBUG) Log.v(TAG, "internal_start_video:");
    MediaCodec codec = null;
    if (trackIndex >= 0) {
        final MediaFormat format = media_extractor.getTrackFormat(trackIndex);
        final String mime = format.getString(MediaFormat.KEY_MIME);
        try {
            codec = MediaCodec.createDecoderByType(mime);
            codec.configure(format, mOutputSurface, null, 0);
            codec.start();
            if (DEBUG) Log.v(TAG, "internal_start_video:codec started");
        } catch (final IOException e) {
            Log.w(TAG, e);
        }
    }
    return codec;
}
项目：libcommon    文件：MediaMoviePlayer.java    
/**
 * @param media_extractor
 * @param trackIndex
 * @return
 */
protected MediaCodec internal_start_audio(final MediaExtractor media_extractor, final int trackIndex) {
    if (DEBUG) Log.v(TAG, "internal_start_audio:");
    MediaCodec codec = null;
    if (trackIndex >= 0) {
        final MediaFormat format = media_extractor.getTrackFormat(trackIndex);
        final String mime = format.getString(MediaFormat.KEY_MIME);
        try {
            codec = MediaCodec.createDecoderByType(mime);
            codec.configure(format, null, null, 0);
            codec.start();
            if (DEBUG) Log.v(TAG, "internal_start_audio:codec started");
            //
            final ByteBuffer[] buffers = codec.getOutputBuffers();
            int sz = buffers[0].capacity();
            if (sz <= 0)
                sz = mAudioInputBufSize;
            if (DEBUG) Log.v(TAG, "AudioOutputBufSize:" + sz);
            mAudioOutTempBuf = new byte[sz];
        } catch (final IOException e) {
            Log.w(TAG, e);
        }
    }
    return codec;
}
项目：libcommon    文件：MediaMoviePlayer.java    
/**
     * @param codec
     * @param extractor
     * @param inputBuffers
     * @param presentationTimeUs
     * @param isAudio
     */
    protected boolean internal_process_input(final MediaCodec codec, final MediaExtractor extractor, final ByteBuffer[] inputBuffers, final long presentationTimeUs, final boolean isAudio) {
//      if (DEBUG) Log.v(TAG, "internal_process_input:presentationTimeUs=" + presentationTimeUs);
        boolean result = true;
        while (mIsRunning) {
            final int inputBufIndex = codec.dequeueInputBuffer(TIMEOUT_USEC);
            if (inputBufIndex == MediaCodec.INFO_TRY_AGAIN_LATER)
                break;
            if (inputBufIndex >= 0) {
                final int size = extractor.readSampleData(inputBuffers[inputBufIndex], 0);
                if (size > 0) {
                    codec.queueInputBuffer(inputBufIndex, 0, size, presentationTimeUs, 0);
                }
                result = extractor.advance();   // return false if no data is available
                break;
            }
        }
        return result;
    }
项目：libcommon    文件：MediaMoviePlayer.java    
/**
 * search first track index matched specific MIME
 * @param extractor
 * @param mimeType "video/" or "audio/"
 * @return track index, -1 if not found
 */
protected static final int selectTrack(final MediaExtractor extractor, final String mimeType) {
    final int numTracks = extractor.getTrackCount();
    MediaFormat format;
    String mime;
    for (int i = 0; i < numTracks; i++) {
        format = extractor.getTrackFormat(i);
        mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith(mimeType)) {
            if (DEBUG) {
                Log.d(TAG_STATIC, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }
    return -1;
}
项目：talk-android    文件：MediaController.java    
@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}
项目：marclay    文件：MoviePlayer.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private static int selectTrack(MediaExtractor extractor) {
  // Select the first video track we find, ignore the rest.
  int numTracks = extractor.getTrackCount();
  for (int i = 0; i < numTracks; i++) {
    MediaFormat format = extractor.getTrackFormat(i);
    String mime = format.getString(MediaFormat.KEY_MIME);
    if (mime.startsWith("video/")) {
      if (VERBOSE) {
        Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
      }
      return i;
    }
  }

  return -1;
}
项目：SiliCompressor    文件：MediaController.java    
@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}
项目：Android-MediaCodec-Examples    文件：ExtractMpegFramesTest.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}
项目：Android-MediaCodec-Examples    文件：ExtractMpegFramesTest_egl14.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}
项目：miku    文件：VideoUtils.java    
private static void concatVideoListFromMediaCodec(List<String> pathList,
                                                  String destinationVideoFilePath, int videoRotation,
                                                  ConcatMediaCallback concatMediaCallback) throws IOException {
  MediaExtractor extractor = new MediaExtractor();
  MediaFormat format = null;
  extractor.setDataSource(pathList.get(0));
  int numTracks = extractor.getTrackCount();
  // find and select the first audio track present in the file.
  for (int i = 0; i < numTracks; i++) {
    format = extractor.getTrackFormat(i);
    if (format.getString(MediaFormat.KEY_MIME).startsWith("audio/")) {
      extractor.selectTrack(i);
      break;
    }
  }
  MediaCodec mediaCodec = MediaCodec.createDecoderByType(format.getString(MediaFormat.KEY_MIME));
  mediaCodec.configure(format, null, null, 0);
  mediaCodec.start();
}
项目：mediacodec    文件：MoviePlayer.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private static int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}
项目：sac-fpv    文件：H264DecodeThread.java    
/**
 * Initialize a MediaExctractor if needed
 * @throws IOException
 */
private void initMediaExtractor() throws IOException{
    String filePath = Environment.getExternalStorageDirectory().getPath() + "/rpi960mal810.h264";
    //String filePath = "/storage/sdcard/rpi960mal810.h264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/somefile2.264"; //???
    //String filePath = "/storage/external_SD/movies/scut1.avi"; //???
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/cat.h264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/ravi2.264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/testfile.264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/cat90.h264";

    File f = new File(filePath);
    boolean ext =  f.exists();


    mediaExtractor = new MediaExtractor();
    mediaExtractor.setDataSource(filePath);
    int trackCount = mediaExtractor.getTrackCount();
    if(trackCount != 1){
       // throw new RuntimeException("TrackCount = " + trackCount + ". Only Single Track is supported");
    }
    mediaExtractor.selectTrack(0);
}
项目：sac-fpv    文件：H264DecodeThreadFileBasedLogging.java    
/**
 * Initialize a MediaExctractor if needed
 * @throws IOException
 */
private void initMediaExtractor() throws IOException{
    String filePath = Environment.getExternalStorageDirectory().getPath() + "/rpi960mal810.h264";
    //String filePath = "/storage/sdcard/rpi960mal810.h264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/somefile2.264"; //???
    //String filePath = "/storage/external_SD/movies/scut1.avi"; //???
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/cat.h264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/ravi2.264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/testfile.264";
    //String filePath = Environment.getExternalStorageDirectory().getPath() + "/vv/cat90.h264";

    File f = new File(filePath);
    boolean ext =  f.exists();


    mediaExtractor = new MediaExtractor();
    mediaExtractor.setDataSource(filePath);
    int trackCount = mediaExtractor.getTrackCount();
    if(trackCount != 1){
        // throw new RuntimeException("TrackCount = " + trackCount + ". Only Single Track is supported");
    }
    mediaExtractor.selectTrack(0);
}
项目：K-Sonic    文件：Track.java    
public void initStream() throws Exception {
    mLock.lock();
    try {
        mExtractor = new MediaExtractor();
        if (!TextUtils.isEmpty(mPath)) {
            mExtractor.setDataSource(mPath);
        } else if (mUri != null) {
            mExtractor.setDataSource(mContext, mUri, null);
        } else {
            throw new IOException();
        }
    } catch (Exception e) {//IOException
        throw e;
    } finally {
        mLock.unlock();
    }
    initConfig();
}
项目：MusicPlus    文件：MediaUtils.java    
/**
 * 该音频是否符合采样率是sampleRate,通道数是channelCount,值为-1表示忽略该条件
 * 
 * @param audioFile
 * @param sampleRate
 * @param channelCount
 * @return
 */
public static boolean isMatchAudioFormat(String audioFile, int sampleRate,int channelCount){
    MediaExtractor mex = new MediaExtractor();
    try {
        mex.setDataSource(audioFile);
    } catch (IOException e) {
        e.printStackTrace();
    }

    MediaFormat mf = mex.getTrackFormat(0);

    boolean result = true;
    if(sampleRate != -1){
        result = sampleRate == mf.getInteger(MediaFormat.KEY_SAMPLE_RATE);
    }

    if(result && channelCount != -1){
        result = channelCount == mf.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
    }

    mex.release();

    return result;
}
项目：AndroidRTSPLib2    文件：MP4Encorder.java    
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);
    }
}
项目：pause-resume-video-recording    文件：MoviePlayer.java    
/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private static int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}
项目：allinone    文件：AudioEncoder.java    
public void prepare(String path) {
    mExtractor = new MediaExtractor();
    try {
        mExtractor.setDataSource(path);
    } catch (IOException e) {
        e.printStackTrace();
    }
    int tracks = mExtractor.getTrackCount();
    for (int i = 0; i < tracks; i++) {
        MediaFormat format = mExtractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        Logs.i(TAG, "mime = " + mime);
    }
    mExtractor.selectTrack(0);
    mAudioBuffer = ByteBuffer.allocate(1024);

    next();;
}
项目：allinone    文件：Maker.java    
private MediaExtractor prepareAudio(String path) {
    MediaExtractor mExtractor = new MediaExtractor();
    try {
        mExtractor.setDataSource(path);
    } catch (IOException e) {
        e.printStackTrace();
    }
    int tracks = mExtractor.getTrackCount();
    for (int i = 0; i < tracks; i++) {
        MediaFormat format = mExtractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        Logs.i(TAG, "mime = " + mime);
    }

    mExtractor.selectTrack(0);
    return mExtractor;
}
项目：Pix-Art-Messenger    文件：AudioTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }

    final int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }

    final int sampleSize = mExtractor.readSampleData(mDecoderBuffers.getInputBuffer(result), 0);
    final boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}
项目：Pix-Art-Messenger    文件：VideoTrackTranscoder.java    
private int drainExtractor(long timeoutUs) {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }
    int result = mDecoder.dequeueInputBuffer(timeoutUs);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        mIsExtractorEOS = true;
        mDecoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }
    int sampleSize = mExtractor.readSampleData(mDecoderInputBuffers[result], 0);
    boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    mDecoder.queueInputBuffer(result, 0, sampleSize, mExtractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}