List to numpy array to write with imageio as video

I have a list as all_frames. I want to write this as a video with imageio but I got the error that you can find in below. How can I change all_frame from list to np.array?

You can find imageio code in below:

all_frames = []

 for j, image in enumerate(image_batch): 
        image_index = (i * batch_size) + j
        if not self.use_tf:
            image = (image.permute(1, 2, 0) * 127.5 + 128).clamp(0, 255).to(torch.uint8).squeeze(0)
        array = np.array(image)

        for effect in self.custom_effects:
            array = effect.apply_effect(array = array, 
                                        index = image_index)

        final_image = Image.fromarray(array, 'RGB')

        if resolution:
            final_image = final_image.resize((resolution, resolution))


        
        all_frames.append(final_image)

imageio.mimwrite('tmp.mp4', all_frames, quality=8, fps=self.sr/self.frame_duration)