How do I create a proper numpy using ffmpeg to use with opencv

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Python

OpenCV

ffmpeg

Hi everyone,
I'm trying to convert with ffmpeg-python every frame of a video in a numpy array that could work with opencv

What I have tried:

Here my code:

<pre><pre lang="Python">for i in (frames):
    out, _ = (
        ffmpeg
        .input(filename)
        .output('pipe:',vframes=frames, format='rawvideo', pix_fmt='rgb24')
        .run(capture_stdout=True)
    )

    video = (
        np
        .frombuffer(out, np.uint8)
        .reshape([-1, 1920, 1080, 3])
    )

    print(f'Array from ffmpeg: {video}')

The code works and it creates a numpy array, but it does not work with opencv.
When I pass inside the for loop the array to opencv I get this error

imgS = cv2.resize(video, (0, 0), None, 0.5, 0.5)
imgS = cv2.cvtColor(imgS, cv2.COLOR_BGR2RGB)

error: (-215:Assertion failed) !dsize.empty() in function 'cv::resize'