add webcam_height and webcam_width to specify the resolution of the Webcam

[yinsumirage]

Description

try to add webcam_height and webcam_width to specify the resolution of the Webcam.
The following code can be executed correctly.

import gradio as gr

with gr.Blocks() as demo:
    image = gr.Image(label="Input", sources="webcam", webcam_height=720, webcam_width=1280)

demo.launch()

However, I don't have a very thorough understanding of resolution, so I didn't see if the image actually changed to a different resolution after modifying the code, which may need help.

Closes: #10027

[freddyaboulton]

Thanks @yinsumirage for the nice contribution!

I prefer we instead just let developers specify the media constraints as a python dictionary and we pass that into the get_stream function. It will be more flexible that way and we can add docstring examples for controlling the height and width specifically. I think we can call this parameter webcam_constraints.

BTW, you also need to specify the new props in image/Index.svelte and image/ImageUploader.svelte and pass them into the Webcam component.

BTW can you do this for video as well now that you're at it? 😊