android.media.MediaExtractor#SAMPLE_FLAG_SYNC源码实例Demo

下面列出了android.media.MediaExtractor#SAMPLE_FLAG_SYNC 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： GPUVideo-android 文件： VideoComposer.java

private int drainExtractor() {
    if (isExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mediaExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != this.trackIndex) {
        return DRAIN_STATE_NONE;
    }
    int result = decoder.dequeueInputBuffer(0);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        isExtractorEOS = true;
        decoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }
    int sampleSize = mediaExtractor.readSampleData(decoderInputBuffers[result], 0);
    boolean isKeyFrame = (mediaExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    decoder.queueInputBuffer(result, 0, sampleSize, mediaExtractor.getSampleTime() / timeScale, isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    mediaExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}

源代码2 项目： GPUVideo-android 文件： RemixAudioComposer.java

private int drainExtractor(long timeoutUs) {
    if (isExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = extractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != this.trackIndex) {
        return DRAIN_STATE_NONE;
    }

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

    final int sampleSize = extractor.readSampleData(decoderBuffers.getInputBuffer(result), 0);
    final boolean isKeyFrame = (extractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    decoder.queueInputBuffer(result, 0, sampleSize, extractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0);
    extractor.advance();
    return DRAIN_STATE_CONSUMED;
}

源代码3 项目： Mp4Composer-android 文件： VideoComposer.java

private int drainExtractor() {
    if (isExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mediaExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != this.trackIndex) {
        return DRAIN_STATE_NONE;
    }
    int result = decoder.dequeueInputBuffer(0);
    if (result < 0) return DRAIN_STATE_NONE;
    if (trackIndex < 0) {
        isExtractorEOS = true;
        decoder.queueInputBuffer(result, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        return DRAIN_STATE_NONE;
    }
    int sampleSizeCompat = mediaExtractor.readSampleData(decoder.getInputBuffer(result), 0);
    boolean isKeyFrame = (mediaExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    decoder.queueInputBuffer(result, 0, sampleSizeCompat, (long)(mediaExtractor.getSampleTime() / timeScale), isKeyFrame ? MediaCodec.BUFFER_FLAG_KEY_FRAME : 0);
    mediaExtractor.advance();
    return DRAIN_STATE_CONSUMED;
}

源代码4 项目： Mp4Composer-android 文件： RemixAudioComposer.java

private int drainExtractor(long timeoutUs) {
    if (isExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = extractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != this.trackIndex) {
        return DRAIN_STATE_NONE;
    }

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

    final int sampleSize = extractor.readSampleData(decoder.getInputBuffer(result), 0);
    final boolean isKeyFrame = (extractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    decoder.queueInputBuffer(result, 0, sampleSize, extractor.getSampleTime(), isKeyFrame ? MediaCodec.BUFFER_FLAG_KEY_FRAME : 0);
    extractor.advance();
    numTracks ++ ;
    return DRAIN_STATE_CONSUMED;
}

源代码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(CodecUtil.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;
}

源代码6 项目： EZFilter 文件： VideoTrackTranscoder.java

private int drainExtractor() {
    if (mIsExtractorEOS) return DRAIN_STATE_NONE;
    int trackIndex = mExtractor.getSampleTrackIndex();
    if (trackIndex >= 0 && trackIndex != mTrackIndex) {
        return DRAIN_STATE_NONE;
    }

    int result = mDecoder.dequeueInputBuffer(0);
    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(CodecUtil.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;
}

源代码7 项目： phoenix 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;
}

源代码8 项目： phoenix 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;
}

源代码9 项目： phoenix 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;
}

源代码10 项目： phoenix 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;
}

源代码11 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;
}

源代码12 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;
}

源代码13 项目： android-transcoder 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;
}

源代码14 项目： android-transcoder 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;
}

源代码15 项目： Mp4Composer-android 文件： AudioComposer.java

@SuppressLint("Assert")
public boolean stepPipeline() {
    if (isEOS) return false;
    int trackIndex = mediaExtractor.getSampleTrackIndex();
    if (trackIndex < 0) {
        buffer.clear();
        bufferInfo.set(0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
        muxRender.writeSampleData(sampleType, buffer, bufferInfo);
        isEOS = true;
        return true;
    }
    if (trackIndex != this.trackIndex) return false;

    buffer.clear();
    int sampleSize = mediaExtractor.readSampleData(buffer, 0);
    if (sampleSize > bufferSize) {
        logger.warning(TAG, "Sample size smaller than buffer size, resizing buffer: " + sampleSize);
        bufferSize = 2 * sampleSize;
        buffer = ByteBuffer.allocateDirect(bufferSize).order(ByteOrder.nativeOrder());
    }
    boolean isKeyFrame = (mediaExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
    int flags = isKeyFrame ? MediaCodec.BUFFER_FLAG_KEY_FRAME : 0;

    if (mediaExtractor.getSampleTime() >= trimStartUs && (mediaExtractor.getSampleTime() <= trimEndUs || trimEndUs == -1)) {
        bufferInfo.set(0, sampleSize, mediaExtractor.getSampleTime(), flags);
        muxRender.writeSampleData(sampleType, buffer, bufferInfo);
    }

    writtenPresentationTimeUs = mediaExtractor.getSampleTime();
    mediaExtractor.advance();
    return true;
}

源代码16 项目： SimpleVideoEditor 文件： VideoBgmAddAction.java

private long getSampleTime(MediaExtractor mediaExtractor, int track) {
    mediaExtractor.selectTrack(track);
    mediaExtractor.readSampleData(sourceBuffer, 0);
    //skip first I frame
    if (mediaExtractor.getSampleFlags() == MediaExtractor.SAMPLE_FLAG_SYNC) {
        mediaExtractor.advance();
    }
    mediaExtractor.readSampleData(sourceBuffer, 0);
    long firstVideoPTS = mediaExtractor.getSampleTime();
    mediaExtractor.advance();
    mediaExtractor.readSampleData(sourceBuffer, 0);
    long secondVideoPTS = mediaExtractor.getSampleTime();
    mediaExtractor.unselectTrack(track);
    return Math.abs(secondVideoPTS - firstVideoPTS);
}

源代码17 项目： VideoProcessor 文件： VideoUtil.java

/**
 * 用于制作全关键帧视频时计算比特率应该为多少
 *
 * @return
 */
public static int getBitrateForAllKeyFrameVideo(VideoProcessor.MediaSource input) throws IOException {
    MediaExtractor extractor = new MediaExtractor();
    input.setDataSource(extractor);
    int trackIndex = VideoUtil.selectTrack(extractor, false);
    extractor.selectTrack(trackIndex);
    int keyFrameCount = 0;
    int frameCount = 0;
    while (true) {
        int flags = extractor.getSampleFlags();
        if (flags > 0 && (flags & MediaExtractor.SAMPLE_FLAG_SYNC) != 0) {
            keyFrameCount++;
        }
        long sampleTime = extractor.getSampleTime();
        if (sampleTime < 0) {
            break;
        }
        frameCount++;
        extractor.advance();
    }
    extractor.release();
    float bitrateMultiple = (frameCount - keyFrameCount) / (float) keyFrameCount + 1;
    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
    input.setDataSource(retriever);
    int oriBitrate = Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_BITRATE));
    retriever.release();
    if (frameCount == keyFrameCount) {
        return oriBitrate;
    }
    return (int) (bitrateMultiple * oriBitrate);
}

源代码18 项目： VideoProcessor 文件： VideoUtil.java

public static Pair<Integer, Integer> getVideoFrameCount(String input) throws IOException {
    MediaExtractor extractor = new MediaExtractor();
    extractor.setDataSource(input);
    int trackIndex = VideoUtil.selectTrack(extractor, false);
    extractor.selectTrack(trackIndex);
    int keyFrameCount = 0;
    int frameCount = 0;
    while (true) {
        int flags = extractor.getSampleFlags();
        if (flags > 0 && (flags & MediaExtractor.SAMPLE_FLAG_SYNC) != 0) {
            keyFrameCount++;
        }
        long sampleTime = extractor.getSampleTime();
        if (sampleTime < 0) {
            break;
        }
        frameCount++;
        extractor.advance();
    }
    extractor.release();
    return new Pair<>(keyFrameCount, frameCount);
}

源代码19 项目： LiTr 文件： PassthroughTranscoder.java

@Override
public int processNextFrame() {
    if (lastResult == RESULT_EOS_REACHED) {
        // we are done
        return lastResult;
    }

    // TranscoderJob expects the first result to be RESULT_OUTPUT_MEDIA_FORMAT_CHANGED, so that it can start the mediaMuxer
    if (!targetTrackAdded) {
        targetFormat = mediaSource.getTrackFormat(sourceTrack);
        if (duration > 0) {
            targetFormat.setLong(MediaFormat.KEY_DURATION, duration);
        }

        targetTrack = mediaMuxer.addTrack(targetFormat, targetTrack);
        targetTrackAdded = true;

        int bufferSize = targetFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
        outputBuffer = ByteBuffer.allocate(bufferSize);

        lastResult = RESULT_OUTPUT_MEDIA_FORMAT_CHANGED;
        return lastResult;
    }

    int selectedTrack = mediaSource.getSampleTrackIndex();
    if (selectedTrack != NO_SELECTED_TRACK && selectedTrack != sourceTrack) {
        lastResult = RESULT_FRAME_PROCESSED;
        return lastResult;
    }

    lastResult = RESULT_FRAME_PROCESSED;

    int bytesRead = mediaSource.readSampleData(outputBuffer, 0);
    if (bytesRead > 0) {
        int outputFlags = 0;
        long sampleTime = mediaSource.getSampleTime();
        int inputFlags = mediaSource.getSampleFlags();

        if ((inputFlags & MediaExtractor.SAMPLE_FLAG_SYNC) != 0) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                outputFlags = MediaCodec.BUFFER_FLAG_KEY_FRAME;
            } else {
                outputFlags = MediaCodec.BUFFER_FLAG_SYNC_FRAME;
            }
        }
        if (duration > 0) {
            progress = ((float) sampleTime) / duration;
        }
        outputBufferInfo.set(0, bytesRead, sampleTime, outputFlags);
        mediaMuxer.writeSampleData(targetTrack, outputBuffer, outputBufferInfo);
        mediaSource.advance();
    } else {
        outputBuffer.clear();
        progress = 1.0f;
        lastResult = RESULT_EOS_REACHED;
        Log.d(TAG, "Reach EoS on input stream");
    }

    return lastResult;
}

源代码20 项目： VideoProcessor 文件： VideoProcessor.java

/**
 * 对视频先检查，如果不是全关键帧，先处理成所有帧都是关键帧，再逆序
 */
public static void reverseVideo(Context context, MediaSource input, String output, boolean reverseAudio, @Nullable VideoProgressListener listener) throws Exception {
    File tempFile = new File(context.getCacheDir(), System.currentTimeMillis() + ".temp");
    File temp2File = new File(context.getCacheDir(), System.currentTimeMillis() + ".temp2");
    try {
        MediaExtractor extractor = new MediaExtractor();
        input.setDataSource(extractor);
        int trackIndex = VideoUtil.selectTrack(extractor, false);
        extractor.selectTrack(trackIndex);
        int keyFrameCount = 0;
        int frameCount = 0;
        List<Long> frameTimeStamps = new ArrayList<>();
        while (true) {
            int flags = extractor.getSampleFlags();
            if (flags > 0 && (flags & MediaExtractor.SAMPLE_FLAG_SYNC) != 0) {
                keyFrameCount++;
            }
            long sampleTime = extractor.getSampleTime();
            if (sampleTime < 0) {
                break;
            }
            frameTimeStamps.add(sampleTime);
            frameCount++;
            extractor.advance();
        }
        extractor.release();

        if (frameCount == keyFrameCount || frameCount == keyFrameCount + 1) {
            reverseVideoNoDecode(input, output, reverseAudio, frameTimeStamps, listener);
        } else {
            VideoMultiStepProgress stepProgress = new VideoMultiStepProgress(new float[]{0.45f, 0.1f, 0.45f}, listener);
            stepProgress.setCurrentStep(0);
            float bitrateMultiple = (frameCount - keyFrameCount) / (float) keyFrameCount + 1;
            MediaMetadataRetriever retriever = new MediaMetadataRetriever();
            input.setDataSource(retriever);
            int oriBitrate = Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_BITRATE));
            int duration = Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
            try {
                processor(context)
                        .input(input)
                        .output(tempFile.getAbsolutePath())
                        .bitrate((int) (oriBitrate * bitrateMultiple))
                        .iFrameInterval(0)
                        .progressListener(stepProgress)
                        .process();
            } catch (MediaCodec.CodecException e) {
                CL.e(e);
                /** Nexus5上-1代表全关键帧*/
                processor(context)
                        .input(input)
                        .output(tempFile.getAbsolutePath())
                        .bitrate((int) (oriBitrate * bitrateMultiple))
                        .iFrameInterval(-1)
                        .progressListener(stepProgress)
                        .process();
            }
            stepProgress.setCurrentStep(1);
            reverseVideoNoDecode(new MediaSource(tempFile.getAbsolutePath()), temp2File.getAbsolutePath(), reverseAudio, null, stepProgress);
            int oriIFrameInterval = (int) (keyFrameCount / (duration / 1000f));
            oriIFrameInterval = oriIFrameInterval == 0 ? 1 : oriIFrameInterval;
            stepProgress.setCurrentStep(2);
            processor(context)
                    .input(temp2File.getAbsolutePath())
                    .output(output)
                    .bitrate(oriBitrate)
                    .iFrameInterval(oriIFrameInterval)
                    .progressListener(stepProgress)
                    .process();
        }
    } finally {
        tempFile.delete();
        temp2File.delete();
    }
}

方法所在类

android.media.MediaExtractor