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How to force Qt updating/repaiting a hidden QWidget for video capturing?
I want to capture (recording a video) of a QWidget. For capturing the widget I use the given window ID and gstreamer. However when the widget is hidden, the capturing process stopps. It seems that there isnt any data from the widget.
When the widget becomes visible again, the capturing resumes.
I tried to keep running QWidget update/repait on the hidden widget.
I also tried to override isVisible() and isHidden() methods of the QWidget. Still no image when the widget is hidden.
Could it be a Qt related issue, or is it X11 related?
qt gstreamer x11 video-capture
asked Nov 19 '18 at 13:06
User_12399
186
add a comment |
I want to capture (recording a video) of a QWidget. For capturing the widget I use the given window ID and gstreamer. However when the widget is hidden, the capturing process stopps. It seems that there isnt any data from the widget.
When the widget becomes visible again, the capturing resumes.
I tried to keep running QWidget update/repait on the hidden widget.
I also tried to override isVisible() and isHidden() methods of the QWidget. Still no image when the widget is hidden.
Could it be a Qt related issue, or is it X11 related?
qt gstreamer x11 video-capture
asked Nov 19 '18 at 13:06
User_12399
186
add a comment |
I want to capture (recording a video) of a QWidget. For capturing the widget I use the given window ID and gstreamer. However when the widget is hidden, the capturing process stopps. It seems that there isnt any data from the widget.
When the widget becomes visible again, the capturing resumes.
I tried to keep running QWidget update/repait on the hidden widget.
I also tried to override isVisible() and isHidden() methods of the QWidget. Still no image when the widget is hidden.
Could it be a Qt related issue, or is it X11 related?
qt gstreamer x11 video-capture
asked Nov 19 '18 at 13:06
User_12399
186
I want to capture (recording a video) of a QWidget. For capturing the widget I use the given window ID and gstreamer. However when the widget is hidden, the capturing process stopps. It seems that there isnt any data from the widget.
When the widget becomes visible again, the capturing resumes.
I tried to keep running QWidget update/repait on the hidden widget.
I also tried to override isVisible() and isHidden() methods of the QWidget. Still no image when the widget is hidden.
Could it be a Qt related issue, or is it X11 related?
qt gstreamer x11 video-capture
qt gstreamer x11 video-capture
asked Nov 19 '18 at 13:06
User_12399
186
asked Nov 19 '18 at 13:06
User_12399
186
asked Nov 19 '18 at 13:06
User_12399
186
asked Nov 19 '18 at 13:06
User_12399
186
asked Nov 19 '18 at 13:06
User_12399
186
186
add a comment |
add a comment |
1 Answer
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One option is to call render on the QWidget directly while passing in your own QPaintDevice. You could then pass the pixel data over a pipe or something into Gstreamer.
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
One option is to call render on the QWidget directly while passing in your own QPaintDevice. You could then pass the pixel data over a pipe or something into Gstreamer.
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
add a comment |
One option is to call render on the QWidget directly while passing in your own QPaintDevice. You could then pass the pixel data over a pipe or something into Gstreamer.
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
add a comment |
One option is to call render on the QWidget directly while passing in your own QPaintDevice. You could then pass the pixel data over a pipe or something into Gstreamer.
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
One option is to call render on the QWidget directly while passing in your own QPaintDevice. You could then pass the pixel data over a pipe or something into Gstreamer.
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
answered Nov 19 '18 at 13:17
Paul Belanger
1,613512
1,613512
add a comment |
add a comment |
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