Unable to play videos on QML Qt6.4 on embedded platform

imahgin

@JoeCFD said in Unable to play videos on QML Qt6.4 on embedded platform:

gstreamer1.0-qt6

Thks.
According to this it seems that qmlgsink plugin in upstream gst-plugin doesn't support qt6 yet

JoeCFD

@imahgin which gstreamer version? check it out
gst-launch-1.0 --version

qml6 sink is available in the later versions of gstreamer. You can build it as well.
Take a look at qgroundcontrol source code. For Android, qml5sink is built from gstreamer source code. You can do the same thing for qml6sink.

imahgin

@JoeCFD Thks Joe.
I've been busy these days and haven't tried your suggestion yet.
I'll do it next week.
By the moment, I got it to work runinng Yocto Dunfell distribution out of the box -no additional codecs or components added-

imahgin

According to this information seems that Qt6 support for rendering video inside a QML scene is available only from version 1.22.0, and according to this NXP document (I'm using this MPU) this version is included in Rev. LF6.1.36_2.1.0 (page 9)

My distribution is previous to that revision and gstreamer version is 1.20.3.
As I'm not an experienced user in Yocto, I'll try to get some assistance to see if there is an 'easy' way to include this -or latest version- on my current Yocto compilation, without breaking other packages.

JoeCFD

@imahgin This is what I posted in gstreamer forum before. The latest gstreamer version is 1.22.6. Make sure that your video card is not too old if you use the latest gstreamer.

Get Source

    get source: git clone https://gitlab.freedesktop.org/gstreamer/gstreamer.git
    git tag -l <==== to list all tags
    git checkout tags/1.22.5 <==== for example 

Build and install

    cd gstreamer
    meson setup --prefix=/opt/thirdParties/gstreamer1-22-5 -Dlibdir=lib builddir
    ninja -C builddir
    sudo ninja install -C builddir

Do not install it in the default dir or under /usr/... because your new installation may mess up with the old installation. And it is hard for you to clean it up. If you purge the old installation, some of video tools installed may not work anymore. Set the proper paths for bin, libs and drivers of the newly installed gstreamer.
meson version may not match. Get the latest meson source and build it.

imahgin

@JoeCFD Thks,
Varisice has unveiledd a new Yocto distribution with Qt 6.5 that upgrades gstreamer to version 1.22.0
I'll build again Yocto and try to run the video on QML with this new version.

imahgin

Today I've successfully built a Yocto image with Qt 6.5 and gstreamer 1.22.0 but the problem remains :-(
Audio works fine, but I get blank image when playing videos on QML..
No errors are displayed and running gstreamer from CLI can play videos without issues.
Tried with both 'Video' and 'MediaPlayer' QML components with the same result.

JoeCFD

@imahgin make sure qml6sink in gstreamer is built and available. if your default Qt is 5, gstreamer build may not include qml6sink. Check the configure info to see if Qt6 is applied to gstreamer build.

FFMpeg is the backend in Qt6. I am not familiar with FFMpeg and do not know if you need qml6 sink in qml when you use Qt multimedia module.

imahgin

@JoeCFD I'm using gstreamer as a backend

qputenv("QT_MEDIA_BACKEND", "gstreamer");

I don't see any qml6sink when compiling Yocto so I need to figure out how to include it.

imahgin

@imahgin According to info provided from NXP -I'm currently using an i.MX93 MCU- the problem is related to the MCU version and some problems with Qt libraries.
I can confirm that with the latest SOC and BSP everything runs normal