MediaRecorder,开始失败:-19

时间:2013-12-19 01:35:05

标签: android google-glass video-recording google-gdk

有没有人设法在Glass上使用MediaRecorder成功录制视频?

这是我用来准备记录器的代码。我一直收到错误-19。

    recorder = new MediaRecorder();

    recorder.setOutputFile(videoFile);

    recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);

    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

    recorder.setVideoFrameRate(15);
    recorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);

    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); 

谢谢。

更新: 它似乎是一个GDK错误。我报告了它并且它被接受了。如果您遇到同样的问题,请将错误报告加以通知:

https://code.google.com/p/google-glass-api/issues/detail?id=360

3 个答案:

答案 0 :(得分:2)

要在Glass上开始视频捕获,您似乎必须完全停止视频预览。如果您使用预览相机,在使用MediaRecorder执行任何操作之前,只需运行:

try {
    mCamera.setPreviewDisplay(null);
} catch (java.io.IOException ioe) {
    Log.d(TAG, "IOException nullifying preview display: " + ioe.getMessage());
}
mCamera.stopPreview();
mCamera.unlock();

此处有更多信息:https://code.google.com/p/google-glass-api/issues/detail?id=360#c6

答案 1 :(得分:1)

经过多次挫折和迭代后,我很高兴地报告可以在Glass XE12上使用MediaRecorder。以下代码适用于运行XE12的Glass版本1:

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setCamera(mCamera);
    mMediaRecorder.setPreviewDisplay(preview.getHolder().getSurface());
    mCamera.unlock();
    // Step 2: Set sources

    mMediaRecorder.setOnErrorListener(new android.media.MediaRecorder.OnErrorListener() {
        public void onError(MediaRecorder mediarecorder1, int k, int i1)
        {
            Log.e(TAG,String.format("Media Recorder error: k=%d, i1=%d", k, i1));
        }

    });
    mMediaRecorder.setVideoSource(0);
    mMediaRecorder.setAudioSource(0);
    mMediaRecorder.setOutputFormat(2);
    mMediaRecorder.setVideoEncoder(2);
    mMediaRecorder.setVideoEncodingBitRate(0x4c4b40);
    mMediaRecorder.setVideoFrameRate(30);
    mMediaRecorder.setVideoSize(1280, 720);
    mMediaRecorder.setAudioChannels(2);
    mMediaRecorder.setAudioEncoder(3);
    mMediaRecorder.setAudioEncodingBitRate(0x17700);
    mMediaRecorder.setAudioSamplingRate(44100);
    mMediaRecorder.setMaxDuration(0);
    mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
    mMediaRecorder.setMaxDuration(-1);

    // Step 5: Set the preview output
    // Step 6: Prepare configured MediaRecorder
    try {
        mMediaRecorder.prepare();
        mMediaRecorder.start();
    } catch (IllegalStateException e) {
        Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (Exception e) {
        Log.d(TAG, "Unknown exception preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    }

答案 2 :(得分:0)

您何时准备录音机,启动应用程序时会发生什么?如果是这样,你是否用语音触发器启动它?

如果这两件事都是真的,那么这可能是the bug described here的一个实例。您可以尝试该线程中的变通方法(指数退避)并查看它是否有效吗?