Streaming and showing video using a QVideoWidget object + FFmpeg

[Ximenes]

Hello,

I'm using QT 6.5 to receive and stream a video, using UDP. This version of QT uses Ffmpeg as default multimedia backend, so I started using QProcess to connect with the server and the 'ffplay' command to present the image. However, I need to embed the video in my application, not just open another screen. Similar to setting my output to a QVideoWidget.

I already tried some options, like setting like this

 QMediaPlayer* player->setSource(QUrl("udp://127.0.0.1:5000"));
 mediaPlayer->setVideoOutput(ui->widget_Video);

but the screen is still black.
Does anyone know how to do that or have any suggestions?

[JoeCFD]

@Ximenes "udp://127.0.0.1:5000" does not seem to be a correct URL to me for streaming. The ip address of the streaming source(camera) on your server is needed here.

[Ximenes]

@JoeCFD,

Yes, I think the URL pass is incorrect anyway. But to clarify, my project connects to a device via access point and when starting the UDP connection, it starts to receive image data. For the codec, I'm using FFmpeg. As a rule, I can capture and display the images and/or save to a file using ffplay or ffmpeg, for example. However, what I would like to do is display the incoming footage in a QT object such as the QVideoWidget. I hope I have clarified the objective.

In other versions of QT it was possible to add media with player.addMedia(QUrl("udp://XXX.X.X:YYYY")); but that option has been removed in the latest versions :(

So anyone have any suggestions how to do it?

[JoeCFD]

@Ximenes I am not using Qt6 for streaming. It is better to go through the latest examples of Qt6 multimedia to find that out. Maybe someone else can help you out.

[SGaist]

Hi,

You are likely hitting QTBUG-111910.

[Ximenes]

Hello,

I have some good news, the last version from QT 6.5.1 solved this issue.
Now we can stream using some protocol, like UDP or TCP, directly to a widget from QT, used as output.

mediaPlayer->setVideoOutput(ui->widget_Video);
QMediaPlayer* player->setSource(QUrl("udp://XXX.X.X.X:YYYY));

[JoeCFD]

@Ximenes Good for you. Is it possible to manipulate or change the streaming settings?