Configuration: PyQt 5.9 with Python 3.6.1 on macOS 10.12.5
Problem: I am evaluating PyQt as a means of playing back videos within a UI. I
am including a simple Python script that reproduces the following three
problems:
1. When the video plays back it is not scaled to fit the widget. Instead,
the pixel ration is set 1:1 and playback is clipped accordingly by the bounds
of the QVideoWidget. When the window is resized, the video does get rescaled.
2. When the window is set to full-screen mode, playback is blocked unless the
user moves the mouse into the menubar or exits full screen mode.
3. The following error appears almost immediately after playback begins:
"/Library/Caches/com.apple.xbs/Sources/AppleGVA/AppleGVA-10.1.16/Sources/Slices/Driver/AVD_loader.cpp:
failed to get a service for display 4”
Discussion: I am writing to see if other users have experienced this issue,
and if so, has anyone discovered a remedy?
Source:
#!/usr/bin/env python3
from PyQt5.QtCore import *
from PyQt5.QtMultimedia import *
from PyQt5.QtMultimediaWidgets import *
from PyQt5.QtWidgets import *
import sys
import os
def handle_error(mp,e):
print("Error!: {} ({})".format(mp.errorString(),e))
def state_changed(mp,s):
if s == QMediaPlayer.StoppedState:
state = "Stopped"
mp.setPosition(0) # Set playback position in ms since the beginning.
mp.play()
elif s == QMediaPlayer.PlayingState:
state = "Playing"
elif s == QMediaPlayer.PausedState:
state = "Paused"
else:
state = "Unknown"
print("Media player state changed to: {} (mp.state() ->
{})".format(state,mp.state()))
if __name__ == '__main__':
app = QApplication(sys.argv)
video_path = os.path.join(os.environ['HOME'],'Movies')
video_name = 'test.mp4'
video_pathname = os.path.join(video_path,video_name)
print("Loading Video: {}".format(video_pathname))
layout = QVBoxLayout()
vw = QVideoWidget()
mp = QMediaPlayer()
mp.error.connect(lambda e: handle_error(mp,e))
mp.stateChanged.connect(lambda s: state_changed(mp,s))
mp.setVideoOutput(vw)
mp.setMedia(QMediaContent(QUrl("file://"+video_pathname)))
window = QMainWindow()
window.setCentralWidget(vw)
window.show()
mp.play()
app.exec_()
Relevant Output:
Media player state changed to: Playing (mp.state() -> 1)
/Library/Caches/com.apple.xbs/Sources/AppleGVA/AppleGVA-10.1.16/Sources/Slices/Driver/AVD_loader.cpp:
failed to get a service for display 4
_______________________________________________
Interest mailing list
Interest@qt-project.org
http://lists.qt-project.org/mailman/listinfo/interest
