如何获取Android中视频文件的关键帧(同步帧)时间戳列表？

import android.media.MediaExtractor;
import android.media.MediaFormat;

public List<Long> getKeyFrameTimeStamps(String videoPath) {
    List<Long> keyFrameTimeStamps = new ArrayList<>();
    MediaExtractor mediaExtractor = new MediaExtractor();
    try {
        mediaExtractor.setDataSource(videoPath);
        int numTracks = mediaExtractor.getTrackCount();
        for (int i = 0; i < numTracks; i++) {
            MediaFormat format = mediaExtractor.getTrackFormat(i);
            String mime = format.getString(MediaFormat.KEY_MIME);
            if (mime.startsWith("video/")) {
                mediaExtractor.selectTrack(i);
                int frameIndex = 0;
                while (true) {
                    MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
                    ByteBuffer buffer = mediaExtractor.getSampleBuffer(frameIndex);
                    if (buffer == null) {
                        break;
                    }
                    mediaExtractor.getSampleTrackIndex();
                    mediaExtractor.getSampleTime();
                    mediaExtractor.getSampleFlags();
                    if ((info.flags & MediaCodec.BUFFER_FLAG_KEY_FRAME) != 0) {
                        keyFrameTimeStamps.add(info.presentationTimeUs);
                    }
                    frameIndex++;
                }
                break;
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        mediaExtractor.release();
    }
    return keyFrameTimeStamps;
}

String videoPath = "/path/to/video/file.mp4";
List<Long> keyFrameTimeStamps = getKeyFrameTimeStamps(videoPath);

for (Long timeStamp : keyFrameTimeStamps) {
    // 处理每个关键帧时间戳
}