How about adding an option to use ffmpeg for videowriting

[AiueoABC]

Maybe ffmpeg-python helps(Ref: kkroening/ffmpeg-python#246)
just import ffmpeg and add/replace videowriting with these;

def vidwrite(fn, images, framerate=60, vcodec='libx264'):
    if not isinstance(images, np.ndarray):
        images = np.asarray(images)
    n,height,width,channels = images.shape
    process = (
        ffmpeg
            .input('pipe:', format='rawvideo', pix_fmt='rgb24', s='{}x{}'.format(width, height))
            .output(fn, pix_fmt='yuv420p', vcodec=vcodec, r=framerate)
            .overwrite_output()
            .run_async(pipe_stdin=True)
    )
    for frame in images:
        process.stdin.write(
            frame
                .astype(np.uint8)
                .tobytes()
        )
    process.stdin.close()
    process.wait()