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Merge pull request #1671 from PySimpleGUI/Dev-latest

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Made slider active. Moving it causes video playback to begin at new …
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MikeTheWatchGuy 2019-07-08 18:36:19 -04:00 • committed by GitHub
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1 changed files with 25 additions and 20 deletions
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45
DemoPrograms/Demo_OpenCV.py
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@ -11,13 +11,15 @@ from sys import exit as exit
"""
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.
It's main purpose is to show you:
1. How to get a frame at a time from a video file using OpenCV
2. How to display an image in a PySimpleGUI Window
Until then enjoy it working somewhat slowly.
For added fun, you can reposition the video using the slider.
"""
def main():
# ---===--- Get the filename --- #
filename = sg.PopupGetFile('Filename to play')
if filename is None:
exit(69)
@ -26,19 +28,22 @@ def main():
num_frames = vidFile.get(cv.CAP_PROP_FRAME_COUNT)
fps = vidFile.get(cv.CAP_PROP_FPS)
sg.ChangeLookAndFeel('Dark')
sg.ChangeLookAndFeel('Black')
# define the window layout
layout = [[sg.Text('OpenCV Demo', size=(15, 1),pad=((510,0),3), justification='center', font='Helvetica 20')],
[sg.Image(filename='', key='image')],
[sg.Slider(range=(0, num_frames), size=(115, 10), orientation='h', key='slider')],
[sg.Button('Exit', size=(10, 2), pad=((600, 0), 3), font='Helvetica 14')]]
# ---===--- define the window layout --- #
layout = [[sg.Text('OpenCV Demo', size=(15, 1), font='Helvetica 20')],
[sg.Image(filename='', key='_image_')],
[sg.Slider(range=(0, num_frames), size=(60, 10), orientation='h', key='_slider_')],
[sg.Button('Exit', size=(7, 1), pad=((600, 0), 3), font='Helvetica 14')]]
# create the window and show it without the plot
window = sg.Window('Demo Application - OpenCV Integration', no_titlebar=False, location=(0,0)).Layout(layout)
image_elem = window.Element('_image_') # locate the elements we'll be updating. Does the search only 1 time
slider_elem = window.Element('_slider_')
# ---===--- LOOP through video file by frame --- #
i = 0
cur_frame = 0
while vidFile.isOpened():
event, values = window.Read(timeout=0)
if event in ('Exit', None):
@ -46,16 +51,16 @@ def main():
ret, frame = vidFile.read()
if not ret: # if out of data stop looping
break
if int(values['_slider_']) != cur_frame-1: # if someone moved the slider manually, the jump to that frame
cur_frame = int(values['_slider_'])
vidFile.set(cv.CAP_PROP_POS_FRAMES, cur_frame)
slider_elem.Update(cur_frame)
cur_frame += 1
window.FindElement('slider').Update(i)
i += 1
# let img be the PIL image
img = Image.fromarray(frame) # create PIL image from frame
bio = io.BytesIO() # a binary memory resident stream
img.save(bio, format= 'PNG') # save image as png to it
imgbytes = bio.getvalue() # this can be used by OpenCV hopefully
window.FindElement('image').Update(data=imgbytes)
img = Image.fromarray(frame) # create PIL image from frame
bio = io.BytesIO() # a binary memory resident stream
img.save(bio, format= 'PNG') # save image as png to it
imgbytes = bio.getvalue() # this can be used by OpenCV hopefully
image_elem.Update(data=imgbytes)
main()