When converted from QImage in QPixmap, the image is broken.

[jules]

def initUI(self):
    self.setGeometry(0, 0, 1920, 1080)
    self.d = QPushButton("sss", self)
    self.d.setGeometry(0, 0, 100, 100)
    self.label = QLabel(self)
    image = ImageGrab.grab(bbox=(0, 0, 1920, 1080))
    q = ImageQt(image)
    q = QImage(q)
    pixmap = QPixmap.fromImage(q)
    self.label.setPixmap(pixmap)
    print(3)
    self.label.resize(pixmap.width(), pixmap.height())

[amarantha]

If I understand you correctly, and you want to make a violin of the chosen screen section, then try this:

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PIL import ImageGrab
class SnippingWidget(QtWidgets.QMainWindow):

closed = QtCore.pyqtSignal()
def __init__(self, parent=None):
    super(SnippingWidget, self).__init__(parent)
    self.setAttribute(QtCore.Qt.WA_NoSystemBackground, True)
    self.setAttribute(QtCore.Qt.WA_TranslucentBackground, True)
    self.setStyleSheet("background:transparent;")
    self.setWindowFlags(QtCore.Qt.FramelessWindowHint)

    self.outsideSquareColor = "red"
    self.squareThickness = 2

    self.start_point = QtCore.QPoint()
    self.end_point = QtCore.QPoint()

def mousePressEvent(self, event):
    self.start_point = event.pos()
    self.end_point = event.pos()
    self.update()

def mouseMoveEvent(self, event):
    self.end_point = event.pos()
    self.update()

def mouseReleaseEvent(self, QMouseEvent):
    r = QtCore.QRect(self.start_point, self.end_point).normalized()
    self.hide()
    img = ImageGrab.grab(bbox=r.getCoords())
    img.save("testImage.png")
    QtWidgets.QApplication.restoreOverrideCursor()
    self.closed.emit()
    self.start_point = QtCore.QPoint()
    self.end_point = QtCore.QPoint()

def paintEvent(self, event):
    trans = QtGui.QColor(22, 100, 233)
    r = QtCore.QRectF(self.start_point, self.end_point).normalized()
    qp = QtGui.QPainter(self)
    trans.setAlphaF(0.2)
    qp.setBrush(trans)
    outer = QtGui.QPainterPath()
    outer.addRect(QtCore.QRectF(self.rect()))
    inner = QtGui.QPainterPath()
    inner.addRect(r)
    r_path = outer - inner
    qp.drawPath(r_path)
    qp.setPen(
        QtGui.QPen(QtGui.QColor(self.outsideSquareColor), self.squareThickness)
    )
    trans.setAlphaF(0)
    qp.setBrush(trans)
    qp.drawRect(r)

class MainWindow(QtWidgets.QMainWindow):

def init(self):

super().init()

self.centralWidget = QtWidgets.QWidget()

self.setCentralWidget(self.centralWidget)
    self.label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
    self.button = QtWidgets.QPushButton('Делать скриншот')
    self.button.clicked.connect(self.activateSnipping)
    
    layout = QtWidgets.QVBoxLayout(self.centralWidget)
    layout.addWidget(self.label, 1)
    layout.addWidget(self.button, 0)

    self.snipper = SnippingWidget()
    self.snipper.closed.connect(self.on_closed)

def activateSnipping(self):
    self.snipper.showFullScreen()
    QtWidgets.QApplication.setOverrideCursor(QtCore.Qt.CrossCursor)
    self.hide()

def on_closed(self):
    pixmap = QtGui.QPixmap("testImage.png")
    self.label.setPixmap(pixmap)
    self.show()
    self.adjustSize()

if name == "main":

app = QtWidgets.QApplication(sys.argv)

w = MainWindow()

w.resize(400, 300)

w.show()

sys.exit(app.exec_())

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