Tkinter resizing images in labels arranged in a grid - python-3.x

Question

To start, I'm totally new to Tkinter and am trying to make a Raspberry Pi Media Player of sorts...
I grab the directories of all .mp4 files on a USB drive, and use PIL to put the thumbnails of the videos into a 3x3 grid of labels, with the grid inside of a frame (frame2 in the code).
Right now, with the thumbnails of varying sizes, the labels are also inconsistently sized. Also, only the top-right portion of larger thumbnails are displayed, rather than the entire image.
How can I to scale and fit the thumbnails into consistently sized labels, in grid form?
Here is part of my code (It's quite large so I try to include only the relevant parts):
import tkinter as tk
from subprocess import Popen
from time import sleep
import os
from random import randint
import imageio
from PIL import ImageTk, Image
from pathlib import Path
#putting 100th frame of video with 'path' into the label
def pack_thumbnail(path, label):
#this is probably not a good way to do this
video = imageio.get_reader(path)
for i in range(100):
try:
image = video.get_next_data()
except:
video.close()
break
frame_image = ImageTk.PhotoImage(Image.fromarray(image))
label.config(image=frame_image)
label.image = frame_image
window = tk.Tk()
window.attributes("-fullscreen", True)
frame1 = tk.Frame(master=window, width=200, height=100, bg="white")
frame1.pack(fill=tk.Y, side=tk.LEFT)
#frame2 contains the grid of labels
frame2 = tk.Frame()
for i in range(3):
frame2.columnconfigure(i, weight=1, minsize=75)
frame2.rowconfigure(i, weight=1, minsize=50)
for j in range(0, 3):
frame = tk.Frame(master=frame2, relief=tk.RAISED, borderwidth=1)
frame.grid(row=i, column=j, padx=5, pady=5)
#path to video to get thumbnail (i only have 3 videos so i randomize it)
vid_path=f"/media/pi/{os.listdir('/media/pi/')[0]}/{folder_name}/{videos[randint(0, 2)]}"
label = tk.Label(master=frame, text=f"Row {i}\nColumn {j}")
pack_thumbnail(vid_path, label)
label.pack(padx=5, pady=5)
frame2.pack()
window.bind("<Escape>", lambda x: window.destroy())
window.mainloop()

Answer 1

You can use Image.thumbnail() to resize the image:
# putting 100th frame of video with 'path' into the label
def pack_thumbnail(path, label):
with imageio.get_reader(path) as video:
image = video.get_data(100) # use get_date() instead of get_next_data()
w, h = 200, 200 # thumbnail size
image = Image.fromarray(image)
image.thumbnail((w, h)) # resize the image
frame_image = ImageTk.PhotoImage(image)
label.config(image=frame_image, width=w, height=h)
label.image = frame_image