Elliot_Young | 2020-05-11 06:42:47 UTC | #1
Thanks for the great write-up. I'm attempting to use this example to stream a live video feed (
numpy array ->
QLabel inside a
QScrollArea) but I am frequently encountering crashes when the label is resized too quickly, or the scroll area is scrolled too quickly. I have seen people mention that it could be a problem with
QImage memory buffer getting cleared before the
QPixmap can update the
QPainter event, but I tried storing a
.copy() of the
QImage and that didn't work.
Is this something you think can be fixed, or does it sound like a fundamental issue with the way threads work with Python/PyQt5?
Elliot_Young | 2020-05-11 06:44:24 UTC | #2
Well only about 30 minutes later, I was able to implement a new signal (
bool, 'result' signal) that gets emitted when the
QImage is converted. I also moved the
setPixmap event to a separate function that only runs when the 'result' signal is emitted and now I haven't experienced any crashes. Thanks so much for your tutorials - I just bought the book!