How to record video in windows using Qt?

Ramiz

It didnt work I connect it and found no error.

jsulm

@Ramiz There are signals for state/status changes you should connect to them to see whether anything is happening.

Ramiz

I am new to QT and what I did I create a button and on that button I write the camera recording code and image capturing code.Image capturing is working fine but recording is not.
Also I write the connect function that you told me on button click.
Did I do it right?

jsulm

@Ramiz Should be fine. Are your slots called? Recording video depends on availability of codecs, are you on Windows, MacOS or Linux?

Ramiz

I am on windows 10 and Yes My slots are called.
My camera works when slots are called also when I clicked on stop record it ask me where you want to save the file in mp4.
After giving a directory to save I couldn't find the file as well but I can see the file in my Quick access.

jsulm

@Ramiz So it actually recorded something? Can you open these files?
And in your slots you should print out the state/status to see what happens.

Ramiz

The size of these files are 0 bytes and they are not opening.Whenever I tried to open any of these files, get an error cant open file.

jsulm

@Ramiz Do you get QMediaRecorder::RecordingState or or QMediaRecorder::RecordingStatus or anything else?

Ramiz

No I didn't get QMediaRecorder::RecordingState or or QMediaRecorder::RecordingStatus

mchinand

I don't think video recording with QT is possible on Windows, see: http://doc.qt.io/qt-5/qtmultimedia-windows.html

Also, check the return value of mCamera->isCaptureModeSupported(QCamera::CaptureVideo);.

Ramiz

It means I cannot control an IP camera through QT on windows?

SGaist

Hi,

Depending on the camera type and how it is seen by the system, you may have to write a small QCamera backend but it's doable.