Question

我想要完成的是将文本添加到SD卡上的现有视频中，经过一些搜索，我发现我必须捕获视频字节并将文本添加到视频的每个帧。

Answer 1

这有助于我从预览中获取byte []。

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    if (mCamera == null) {
        return;
    }

            mCamera.setPreviewCallback(new PreviewCallback() {

        @Override
        public void onPreviewFrame(byte[] data, Camera camera) {

            //the parameter 'data' holds the frame information

              int width = 0; int height = 0;

              Camera.Parameters parameters = camera.getParameters();

              height = parameters.getPreviewSize().height;

              width = parameters.getPreviewSize().width;


            // You can change formats, save the data
            // to file etc.

              YuvImage yuvImage = new YuvImage(data, ImageFormat.NV21,
              width, height, null);

              Rect rectangle = new Rect(0, 0, width, height);

              yuvImage.compressToJpeg(rectangle, 100, stream);

        }

    });

    // If your preview can change or rotate, take care of those events here.
    // Make sure to stop the preview before resizing or reformatting it.

    if (mHolder.getSurface() == null) {
        // preview surface does not exist
        return;
    }

    // stop preview before making changes
    try {
        mCamera.stopPreview();
    } catch (Exception e) {
        // ignore: tried to stop a non-existent preview
    }

    // set preview size and make any resize, rotate or
    // reformatting changes here
    CameraOrientationHelper.setCameraDisplayOrientation(mActivity, mCameraId, mCamera);

    // start preview with new settings
    try {
        mCamera.setPreviewDisplay(mHolder);

        mCamera.startPreview();     } catch (Exception e) {
        Log.d(TAG, "Error starting camera preview: " + e.getMessage());
    }
}
}

来源：https://nidesai.wordpress.com/2013/09/22/android-camera-capturing-raw-video-frames/

我一直在努力寻找与你的问题相似的解决方案。我需要在录制视频时将文字添加到视频中。因此，当视频保存时，它包含文本。

捕获录制的视频帧字节数组不预览

1 个答案: