Question

我正在用Python编写TCP客户端-服务器系统的代码。服务器是带有Pi相机的Raspberry PI 3，客户端是远程PC，可通过Tkinter GUI和zmq套接字控制所有内容。服务器不断获取流，并按照下面列出的步骤通过套接字将其发送到： https://picamera.readthedocs.io/en/release-1.13/recipes1.html#capturing-to-a-stream

服务器端：

stream = io.BytesIO()
for foo in camera.capture_continuous(stream, 'jpeg'):
    # Write the length of the capture to the stream and flush to
    # ensure it actually gets sent
    connection.write(struct.pack('<L', stream.tell()))
    connection.flush()
    # Rewind the stream and send the image data over the wire
    stream.seek(0)
    connection.write(stream.read())
    # Reset the stream for the next capture
    stream.seek(0)
    stream.truncate()
    # Write a length of zero to the stream to signal we're done
connection.write(struct.pack('<L', 0))

客户端：

while True:
    # Read the length of the image as a 32-bit unsigned int. If the
    # length is zero, quit the loop
    image_len = struct.unpack('<L', 
    connection.read(struct.calcsize('<L')))[0]
    if not image_len:
        break
    # Construct a stream to hold the image data and read the image
    # data from the connection
    image_stream = io.BytesIO()
    image_stream.write(connection.read(image_len))
    # Rewind the stream, open it as an image with PIL and do some
    # processing on it
    image_stream.seek(0)

到目前为止，一切正常。

当我想通过TCP套接字发送RAW图像时出现问题。我使用以下代码获取RAW数据：

with picamera.PiCamera() as camera:
with picamera.array.PiBayerArray(camera) as stream:
    camera.capture(stream, 'jpeg', bayer=True)
    # Demosaic data and write to output (just use stream. array if you
    # want to skip the demosaic step)
    output = (stream.demosaic() >> 2).astype(np.uint8)
    with open('image.data', 'wb') as f:
        output.tofile(f)

从https://picamera.readthedocs.io/en/release-1.13/recipes2.html#raw-bayer-data-captures

获得

我想做的是使用前面列出的客户端-服务器方案发送名为“ output”的变量，我认为其中包含一个字节数组（或一个numpy数组？）。如何使用struct.pack方法打包（服务器端）和解包（客户端）“输出”？是否还有另一种通过TCP套接字发送该数据的方法？

谢谢！

通过TCP套接字发送数据

0 个答案: