“QtMultimedia.availableCameras” does not return list of all available cameras

[neda]

Hi,
I use "QCameraInfo::availableCameras" for show list of available cameras. It works for a lot of cameras. But I have a new camera and it does not exist in list. This camera have a application and it works by self application. Also I can see that in node imaging devices in Device Manager.


The OS I'm using right now is Windows 10x64. I use Qt 5.11.2 (MSVC 2015, 32 bit).

I use this codes in QML and C++:

QtMultimedia.availableCameras.
qDebug()<<QCameraInfo::availableCameras().count();

My codes return list of all camera except "FMA050".

[SGaist]

Hi,

What kind of camera is that ?
How is it connected ?

[neda]

@SGaist said in “QtMultimedia.availableCameras” does not return list of all available cameras:

Thanks

What kind of camera is that ?

Standard C-Mount camera with Aptina CMOS sensor.
http://touptek.com/product/showproduct.php?lang=en&id=274

How is it connected ?

USB

[SGaist]

So it's a camera with custom SDK provided. Since DirectShow is mentioned did you already tried to access the camera through it ?

Qt has a DirectShow backend, check whether your application loads it using the QT_DEBUG_PLUGINS environment variable set to 1.

[neda]

@SGaist

So it's a camera with custom SDK provided. Since DirectShow is mentioned did you already tried to access the camera through it ?

No

check whether your application loads it using the QT_DEBUG_PLUGINS environment variable set to 1.

I start my application with the QT_DEBUG_PLUGINS set to 1 but to no avail.

main.cpp

qputenv("QT_DEBUG_PLUGINS", QByteArray("1"));

Application output:

QMediaPluginLoader: loading metadata for iid  "org.qt-project.qt.mediaserviceproviderfactory/5.0"  at location  "/mediaservice"
QMediaPluginLoader: Inserted index  0  into metadata:  QJsonObject({"Keys":["directshow"],"Services":["org.qt-project.qt.camera","org.qt-project.qt.mediaplayer"],"index":0})
QMediaPluginLoader: Inserting new list for key:  "org.qt-project.qt.camera"
QMediaPluginLoader: Inserting new list for key:  "org.qt-project.qt.mediaplayer"
QMediaPluginLoader: Inserted index  1  into metadata:  QJsonObject({"Keys":["audiocapture"],"Services":["org.qt-project.qt.audiosource"],"index":1})
QMediaPluginLoader: Inserting new list for key:  "org.qt-project.qt.audiosource"
QMediaPluginLoader: Inserted index  2  into metadata:  QJsonObject({"Keys":["windowsmediafoundation"],"Services":["org.qt-project.qt.audiodecode"],"index":2})
QMediaPluginLoader: Inserting new list for key:  "org.qt-project.qt.audiodecode"

[SGaist]

@neda said in “QtMultimedia.availableCameras” does not return list of all available cameras:

So it's a camera with custom SDK provided. Since DirectShow is mentioned did you already tried to access the camera through it ?

No

Can you test that ? Is there anything mentioning registering the DirectShow filter for that camera ?