Merge pull request #143 from MikeTheWatchGuy/Dev-latest

New OpenCV Demo

Demo_OpenCV.py

@@ -0,0 +1,58 @@
+import cv2 as cv
+from PIL import Image
+import tempfile
+import PySimpleGUI as sg
+import os
+
+"""
+Demo program to open and play a file using OpenCV
+Unsure how to get the frames coming from OpenCV into the right format, so saving each frame to
+a temp file.  Clearly... clearly... this is not the optimal solution and one is being searched for now.
+
+Until then enjoy it working somewhat slowly.
+"""
+
+def main():
+    filename = sg.PopupGetFile('Filename to play')
+    if filename is None:
+        exit(69)
+    vidFile = cv.VideoCapture(filename)
+    # ---===--- Get some Stats --- #
+    num_frames = vidFile.get(cv.CAP_PROP_FRAME_COUNT)
+    fps = vidFile.get(cv.CAP_PROP_FPS)
+
+    sg.ChangeLookAndFeel('Dark')
+
+    # define the form layout
+    layout = [[sg.Text('OpenCV Demo', size=(40, 1), justification='center', font='Helvetica 20')],
+              [sg.Image(filename='', key='image')],
+              [sg.Slider(range=(0, num_frames), size=(60, 10), orientation='h', key='slider')],
+              [sg.ReadFormButton('Exit', size=(10, 2), pad=((280, 0), 3), font='Helvetica 14')]]
+
+    # create the form and show it without the plot
+    form = sg.FlexForm('Demo Application - Embedding Matplotlib In PySimpleGUI')
+    form.Layout(layout)
+    form.ReadNonBlocking()
+
+
+    # ---===--- LOOP through video file by frame --- #
+    i = 0
+    temp_filename = next(tempfile._get_candidate_names()) + '.png'
+    while vidFile.isOpened():
+        button, values = form.ReadNonBlocking()
+        if button is 'Exit' or values is None:
+            os.remove(temp_filename)
+            exit(69)
+        ret, frame = vidFile.read()
+        if not ret:  # if out of data stop looping
+            break
+
+        form.FindElement('slider').Update(i)
+        i += 1
+
+        with open(temp_filename, 'wb') as f:
+            Image.fromarray(frame).save(temp_filename, 'PNG')  # save the PIL image as file
+            form.FindElement('image').Update(filename=temp_filename)
+
+
+main()