Problem with Qt Multimedia

KhoaTran Programmer

Your log is not detail enough. You should enable Gstreamer debug, your current is just Qt.

But I guest that, your current Gstreamer plugin is not enough to playback.

One question, what kind of movie content you want to playback?(Mp4, WMV, H264, H265, MP3, ...)

Best regards,
Khoa

6EQUJ5

@SGaist I didn't install GStreamer. How to install? Specific instructions please the official GStreamer site doesn't help much at all for Debian.

@KhoaTran-Programmer Firstly, the commands to check if GStreamer is installed doesn't work. How to install? Specifically. The official GStreamer site doesn't help at all for Debian. Also, I would want to play MP4, MP3, AVI, WMV, etc. All those common ones. Doesn't QMediaPlayer support most common ones?

SGaist

Because it's not their role. Use your distribution tools to install GStreamer.

Specifically, apt-cache search to see what package are installed and apt-get install to install what you want.

In your case, libgstreamer1.0-dev as well as all the 1.0 plugins packages.

6EQUJ5

@SGaist I did that and the same error happens.

SGaist

Can you play that file with the gstreamer tools directly ?

6EQUJ5

@SGaist How would I do that?

SGaist

gst-play-1.0 your_video_file

6EQUJ5

@SGaist The command doesn't exist. Even though I installed libgstreamer1.0-dev.

SGaist

That's the development package to be able to use the library in your own projects. You need to install the GStreamer tools.

6EQUJ5

@SGaist What package do I need to install for the GStreamer tools?

SGaist

Please learn to use the tools from your distribution apt-cache search gstreamer | grep tools.

6EQUJ5

@SGaist I installed all the packages that came up with that command. gst-play-1.0 still doesn't work.

SGaist

What doesn't work ?

You can't read the file using the command ?

6EQUJ5

@SGaist The command still doesn't exist according to the terminal even with sudo.

SGaist

Seriously, did you even try to search where that file could be found ?

In this case it's the package gstreamer1.0-plugins-base-apps and the tools package is a dependency of that one.

6EQUJ5

@SGaist I'm sorry. I may be at least an amateur programmer, but I'm definitely not a Linux expert, so I lack knowledge. I tried googling to get gst-play-1.0 to work but came up with nothing.

Installing gstreamer1.0-plugins-base-apps allowed me to use the gst-play-1.0 command. But, when I try to play a video file (MP4) the same thing happens! I get logged out!

SGaist

Then you have determined that it's not a Qt problem. There's something fishy going on with your machine.

6EQUJ5

@SGaist It works fine in Windows 10 though. What could possibly be wrong with Debian Linux?

SGaist

You are comparing apple to oranges. Both are completely different OSs with completely different multimedia backends.

I don't know what is going on with your Debian but you sure have something either misconfigured or buggy. However, it's not something Qt related. You should check with the Debian folks.

jsulm

@6EQUJ5 I would guess bad graphics driver.
You could check the output of dmesg command. In general you should ask this question in a Debian forum or mailing list and attach information about your system (especially graphics hardware).