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DirectShow and device property dialogs
Hello, I need to show the dialogs page of a Video Device from Qt.
I need in order to use OPENCV and I need to configure the capture device to PAL_B, by default is NTSC.
It's possible to do this?
Hi and welcome to devnet,
How will you be configuring these devices ?
Hello, and thanks for answering.
That I need is to enum the video capture devices in a system, select one and call his property page.
This page, I think, can have up to 3 subpages, source, format and display.
I want to use opencv and QT and with a webcam works ok, but a camera with capture device, I need to configure it before use.
For example, the video capture device by default is configured to NTSC and my camera is PAL_B, opencv can't change this. I think I need call driver standard DSHOW config pages to do this.
Do you understand me?
How are you doing it currently ?
Currently only opening de camera. Previously with a video app, I configure de driver to PAL_B.
I can't open this dialog from Qt, pyrhon etc.
OpenCV is ok to work with webcams, but to work with video capture devices......... These devices need to configure their parameters in order to work.
Bonnie last edited by Bonnie
If you open the device by opencv, then I don't think Qt can configure it.
Also, I don't find any Qt API that can show DSHOW config dialog.
Instead, I find that there is
Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored)
Maybe you should have a look at that?
Hi, effectively. Qt can not configure it, but neither can OpenCV .
CAP_PROP_SETTING have not access to these configurations.
The only way is by directshow API, (or VFW).
I have been able to find several examples in c++ but I don't unsterstand them and they don't work.
I'm using Qt with MVS2017 64 bits.
What example are these ?
I am reading about..........