Question

为了从android中的图像序列创建视频，我使用了javacv 0.6库，但我遇到了问题：它通常适用于htc Sensation（Android 4.0.1，处理器类型armv7）和htc Desire（Android 2.3.3，处理器类型arm7）手机，但它不适用于htc Wildfire （Android 2.3.5，处理器类型armv6）手机尤其在这部分代码中失败

FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(videoFilePath,       
TalkingPhotoConstants.VIDEO_FRAME_WIDTH,TalkingPhotoConstants.VIDEO_FRAME_HEIGHT);

附带的代码。

public class MovieCreator extends AsyncTask<String, Void, Boolean> {

private opencv_core.IplImage[] iplimage;
private String audioFilePath;


private ProgressDialog progressDialog;
private Context context;
private List<TalkFrame> frames;

public MovieCreator(Context context, opencv_core.IplImage[] images, String audioFilePath,           
List<TalkFrame> frames) {
    this.context = context;
    this.iplimage = images;
    this.audioFilePath = audioFilePath;
    this.frames = frames;

}

private String createMovie() {

    String videoName = TalkingPhotoConstants.TMP_VIDEO_NAME;
    String path = TalkingPhotoConstants.RESOURCES_TMP_FOLDER;
    String videoFilePath = path + videoName;
    String finalVideoName = TalkingPhotoConstants.FINAL_VIDEO_NAME + 
    System.currentTimeMillis() + ".mp4";
    String finalVideoPath = TalkingPhotoConstants.RESOURCES_FOLDER + finalVideoName;

    try {

        FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(videoFilePath, 
        TalkingPhotoConstants.VIDEO_FRAME_WIDTH,TalkingPhotoConstants.VIDEO_FRAME_HEIGHT);


        //int frameCount = iplimage.length;
        int frameCount = frames.size();
        recorder.setAudioCodec(AV_CODEC_ID_AMR_NB);
        recorder.setVideoCodec(AV_CODEC_ID_MPEG4);

        recorder.setVideoBitrate(120000);
        recorder.setFrameRate(TalkingPhotoConstants.VIDEO_FRAME_RATE);

        recorder.setPixelFormat(AV_PIX_FMT_YUV420P);
        recorder.setFormat("mp4");

        recorder.start();


        for (int i = 0; i < frameCount; i++) {
            TalkFrame currentFrame = frames.get(i);
            long duration = currentFrame.getDuration();
            opencv_core.IplImage iplImage = cvLoadImage(currentFrame.getImageName());

            for (int j = 0; j < TalkingPhotoConstants.VIDEO_FRAME_RATE * duration; j++) {
                recorder.record(iplImage);

            }

        }

        recorder.stop();

        mergeAudioAndVideo(videoFilePath, audioFilePath, finalVideoPath);

    } catch (Exception e) {
        Log.e("problem", "problem", e);
        finalVideoName = "";
    }
    return finalVideoName;
}

private boolean mergeAudioAndVideo(String videoPath, String audioPath, String outPut)  
throws Exception {
    boolean isCreated = true;
    File file = new File(videoPath);
    if (!file.exists()) {
        return false;
    }


    FrameGrabber videoGrabber = new FFmpegFrameGrabber(videoPath);
    FrameGrabber audioGrabber = new FFmpegFrameGrabber(audioPath);

    videoGrabber.start();
    audioGrabber.start();
    FrameRecorder recorder = new FFmpegFrameRecorder(outPut,
            videoGrabber.getImageWidth(), videoGrabber.getImageHeight(),
            audioGrabber.getAudioChannels());


    recorder.setFrameRate(videoGrabber.getFrameRate());
    recorder.start();
    Frame videoFrame = null, audioFrame = null;
    while ((audioFrame = audioGrabber.grabFrame()) != null) {
        videoFrame = videoGrabber.grabFrame();
        if (videoFrame != null) {
            recorder.record(videoFrame);
        }
        recorder.record(audioFrame);

    }
    recorder.stop();
    videoGrabber.stop();
    audioGrabber.stop();
    return isCreated;
}

@Override
protected Boolean doInBackground(String... params) {
    String fileName = createMovie();
    boolean result = fileName.isEmpty();
    if (!result) {
        VideoDAO videoDAO = new VideoDAO(context);
        videoDAO.open();
        videoDAO.createVideo(fileName);
        videoDAO.close();
    }
    //Utils.cleanTmpDir();
    return result;
}

@Override
protected void onPreExecute() {
    progressDialog = new ProgressDialog(context);
    progressDialog.setTitle("Processing...");
    progressDialog.setMessage("Please wait.");
    progressDialog.setCancelable(false);
    progressDialog.setIndeterminate(true);
    progressDialog.show();
}

@Override
protected void onPostExecute(Boolean result) {
    if (progressDialog != null) {
        progressDialog.dismiss();

    }
}

}

没有例外。

1.我可以解决吗？

2.我的版本问题与设备的处理器类型有关。

如果我是对的，我该如何解决？

提前致谢。

Answer 1

JavaCV包含一些由Java调用的本机C代码。看起来您已经为ARMv7编译了一个版本，但是没有为ARMv6编译。

为了使其工作，您需要为您想要定位的处理器（在本例中为ARMv6）重新编译JavaCV本机位。一旦你完成了这个，你会发现它运作正常。

原生代码很痛苦，但对于像这样的应用程序而言，它在执行一些CPU密集型操作时非常重要。

从图像序列javacv创建视频

1 个答案: