Best way to update UI for 6 channel video stream and dozens buttons

Beatrix

Hi,

I am trying to show 4 video stream channel in the UI with buttons, config and some editing section on the UI.
What I am doing now :

qApp->processEvents();

each stream channel process call processEvents(); after doing some preprocess.

UI looks getting slower . Machine is i7 2.3 Ghz.

What is the smooth and the fastest way to show all stream on th gu realtime while all other buttons etc responsive and not laggy ?

NOTE: I am using QLabel to show video streams with :

ui->QLabel->setPixmap(QPixmap::fromImage(qimg));

Thanks in advance.
Beatrix

SGaist

Hi and welcome to devnet,

Where are your video stream coming from ?
What version of Qt are you using ?
What OS are you running ?

Buckwheat

To go along with @SGaist , can you post some of your code? Are you using threads?

Beatrix

Qt 5.11
streams coming from IP Cameras 1080px
OS is Ubuntu
OpenCV 3.4

Yes I am using threads signal slots to connect all 6 stream(6 threads) to the main UI.

The question is about the OpenCV is good enough to handle streams 24 hours.

Or I should try someting else ?

I donw know is I can get stream and the frames directly from the Qt without openCV

Just need advise to direction or may be examples for to be in the right track

Best

SGaist

It depends on what generates the stream. You have to give more details about your hardware.

Beatrix

intel i7 2.4 Ghz 8 cores 32 gig ram.

stream is rtsp 1080p

SGaist

So you have 6 network inputs ?