Pyqt5 installation and configuration to pycharm method:Teach you how to install pyqt5 and its related configurations with pycharm
I. Introduction
QLabel is the label class in the interface, inherited from the QFrame class, provides text and image display, and is a display control.
QLabel objects can display non-editable text or images, can hold an animated GIF, and can be used as hint tags for other controls.
Plain text, links or rich text can also be displayed on the label.
II. Basic usage
2.1 QLabel control
setAlignment(): aligns text in a fixed-value manner.There are the following alignments:
(horizontally aligned left), (horizontally aligned right), (horizontally aligned center), (horizontally spaced ends aligned), (vertically aligned top), (vertically aligned bottom), (vertically aligned center)
- setIndent()：Setting text indentation
- setPixmap()：Setting QLabel as a Pixmap Image
- text()：Getting the text content of a QLabel
- setText()：Setting the text content of a QLabel
- selectedText()：Returns the selected character
- setBuddy():Setting up partnerships
- setWordWrap():Set whether to allow line breaks
2.2 Signals (Events) Commonly Used by QLabel
1.linkHovered：When the mouse pointer slides over a hyperlink embedded in a label, a slot function is needed to bind to this signal
2.linkActivated：The setOpenExternalLinks feature must be set to true when clicking on a hyperlink embedded in a tab and wishing to open the hyperlink in a new window.
III. QLabel Playback Video
The focus of using QLabel to play video files lies in the **** timer QTimer
Timers are used when the time needs to be displayed in a program or when an operation needs to be performed periodically in a program
3.1 QTimer
Import the QTimer module.
from import QTimer
Initialization.
self.timer_camera = QTimer()
Timed and activated.
self.timer_camera.start(1000) # 1000ms == 1s self.timer_camera.() # Connecting Slot FunctionsopenFrame
Note: When the parent object of a QTimer is destroyed, it is also destroyed automatically.
3.2 Code
UI interface:
python program:
from import *
from import *
from import *
from import loadUiType
import cv2
import sys
vedio_ui, _ = loadUiType('./UI/')
class VedioGui(QMainWindow, vedio_ui):
# Define constructor methods
def __init__(self):
QMainWindow.__init__(self)
(self)
self.timer_camera = QTimer()
self.handle_buttons()
self.open_vedio()
# All Button messages communicate with the slot
def handle_buttons(self):
self.btn_Start.(self.Btn_Start)
self.btn_Stop.(self.Btn_Stop)
def Btn_Start(self):
# Timer on, every so often, read a frame #
self.timer_camera.start(100)
self.timer_camera.()
def Btn_Stop(self):
# ()
self.timer_camera.stop()
def open_vedio(self):
"""Select video file"""
# Here's an example of mp4 and avi video playback
openfile_name = (self, 'chose files', '', 'Image files(*.mp4 *.avi)') # Open the file selection box to select the file
self.file_name = openfile_name[0] # Get the name of the image
# Getting the file extension needs to be modified as appropriate #
suffix = self.file_name.split("/")[-1][self.file_name.split("/")[-1].index(".") + 1:]
# print(self.file_name, suffix)
if self.file_name == '':
pass
elif suffix == "mp4" or suffix == "avi":
= (self.file_name)
def OpenFrame(self):
ret, image = ()
if ret:
if len() == 3:
image = (image, cv2.COLOR_BGR2RGB)
vedio_img = QImage(, [1], [0], QImage.Format_RGB888)
elif len() == 1:
vedio_img = QImage(, [1], [0], QImage.Format_Indexed8)
else:
vedio_img = QImage(, [1], [0], QImage.Format_RGB888)
self.vedio_label.setPixmap(QPixmap(vedio_img))
self.vedio_label.setScaledContents(True) # Adaptive windows
else:
()
self.timer_camera.stop()
# Interface close event that asks the user whether to close the
def closeEvent(self, event):
reply = (self, 'Exit', "Do you want to exit this interface?",
| , )
if reply == :
()
()
else:
()
if __name__ == "__main__":
app = QApplication()
window = VedioGui()
()
(app.exec_())Video playback is successfully displayed:
Note: Video playback without sound
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