Android:如何将预览帧保存为 jpeg 图像? [英] Android: How to save a preview frame as jpeg image?

问题描述

我想将预览帧保存为 jpeg 图像.

I would like to save a preview frame as a jpeg image.

我已尝试编写以下代码:

I have tried to write the following code:

public void onPreviewFrame(byte[] _data, Camera _camera)
{
    if(settings.isRecording())
    {
        Camera.Parameters params = _camera.getParameters();
        params.setPictureFormat(PixelFormat.JPEG);
        _camera.setParameters(params);
        String path = "ImageDir" + frameCount;
        fileRW.setPath(path);
        fileRW.WriteToFile(_data);
        frameCount++;
    }
}

但无法将保存的文件打开为 jpeg 图像.有谁知道如何将预览帧保存为 jpeg 图像?

but it's not possible to open a saved file as a jpeg image. Does anyone know how to save preview frames as jpeg images?

谢谢

推荐答案

签出此代码.希望对你有帮助

checkout this code. i hope it helps

camera.setPreviewCallback(new PreviewCallback() {
                    @Override
                    public void onPreviewFrame(byte[] data, Camera camera) {
                        // TODO Auto-generated method stub
                        Camera.Parameters parameters = camera.getParameters();
                        Size size = parameters.getPreviewSize();
                        YuvImage image = new YuvImage(data, ImageFormat.NV21,
                                size.width, size.height, null);
                        Rect rectangle = new Rect();
                        rectangle.bottom = size.height;
                        rectangle.top = 0;
                        rectangle.left = 0;
                        rectangle.right = size.width;
                        ByteArrayOutputStream out2 = new ByteArrayOutputStream();
                        image.compressToJpeg(rectangle, 100, out2);
                        DataInputStream in = new DataInputStream();
                        in.write(out2.toByteArray());

                        }
                    }

                });
                camera.startPreview();

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