Using GstVideoOverlay on Mac
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Using GstVideoOverlay on Mac
 
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Re: Using GstVideoOverlay on Mac
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On Mi, 2016-01-06 at 17:33 +0000, Andy Robinson wrote:
> Mac OS 10.10 > GStreamer 1.6.1 > Xcode 6.4 > > Hello, can anyone point me to any sample code (C/C++) showing how to > display video on the Mac, in a window owned by the application > (rather than GStreamer creating a window for the video)? > > I have written code (using wxWidgets as it happens) which works fine > on Linux/GTK and on Windows. > > I have a top-level window containing a child control in which I want > the video to appear. I get a handle like this: > > #ifdef __WXMAC__ > NSView *nsv = GetPeer()->GetWXWidget(); > m_video_window_handle = (gulong)nsv; > #endif > > The wxWidgets people assure me that this will obtain a NSView* on > Mac. > > Then in the bus_sync_callback I do: > GstVideoOverlay *overlay = > GST_VIDEO_OVERLAY(GST_MESSAGE_SRC(msg)); > gst_video_overlay_set_window_handle(overlay, > m_video_window_handle); > > As I say, this works on Windows & Linux. But on Mac the place where > the video should be, is blank. that contains the actual video. Can you try without wxWidgets in a plain OSX application if you have the same problem? Also which video sink is actually used here? -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Re: Using GstVideoOverlay on Mac
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On Fr, 2016-01-08 at 15:37 +0200, Sebastian Dröge wrote:
> This seems all correct, assuming the NSView can accept a child view > that contains the actual video. What basically happens is that we call addSubview on whatever NSView you provide there -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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On So, 2016-01-10 at 16:42 +0000, Andy Robinson wrote:
> Thanks for this - I'm still wrestling with it. I was using > autovideosink but your question prompted me to use gst-inspect to see what else is > available and I found osxvideosink. This doesn't work too well - it > displays a green screen or a freeze frame of the first frame of the > video, and the pipeline doesn't want to go into a PAUSE state, but, the > green screen rectangle is in the right place in my parent window, which > encourages me to think that the NSView* I am giving to > gst_video_overlay_set_window_handle is indeed the right thing. Try using glimagesink, it generally works better than osxvideosink and also has more features. Does that work better? > I agree that writing a plain OSX application would be good. I've only > ever programmed the Mac using wxWidgets so it would be very helpful for > me if there were any simple example programs using GStreamer on Mac for > me to use as a starting point. Are there any such samples? I think I've > seem samples mentioned in the GStreamer docs, but I've not found the > samples themselves. Unfortunately I'm not aware of a plain OSX application that uses the GstVideoOverlay interface, only GTK+ applications and plain OSX applications using the CoreAnimation sink. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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In reply to this post by Andy Robinson
On Di, 2016-01-12 at 14:40 +0000, Andy Robinson wrote:
> On 11/01/16 21:07, Sebastian Dröge wrote: > > Try using glimagesink, it generally works better than osxvideosink > > and > > also has more features. Does that work better? > > This behaves the same as autovideosink - if I omit the call to > gst_video_overlay_set_window_handle then it displays the video in a > separate window. When I include the call to > gst_video_overlay_set_window_handle then I get no video at all, and > my NSView has no subviews. Although from inside the program, > everything seems to be working smoothly. here https://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer and include a example application (plus instructions how to build it). > > Unfortunately I'm not aware of a plain OSX application that uses > > the GstVideoOverlay interface, only GTK+ applications and plain OSX > > applications using the CoreAnimation sink. > > So are you saying that nobody uses this feature on Mac? Is it > possible that it simply doesn't work? It was definitely working a longer time ago but I wouldn't be surprised if nobody is using the GstVideoOverlay interface on OSX nowadays as there are better ways for native OSX applications now. However we should make it work again, but probably should first of all check if it works in a non-wxwidgets OSX application :) > I don't know what CoreAnimation sink is, it doesn't seem to be > installed on my system (a "full install" of 1.6.1). > Is it something I could use for displaying video in a NSView owned by > my app (which is all I want to do)? No, it's something that is integrating into Apple's CoreAnimation API. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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On Do, 2016-01-14 at 11:24 +0000, Andy Robinson wrote:
> On 13/01/16 20:34, Sebastian Dröge wrote: > > It was definitely working a longer time ago but I wouldn't be > > surprised > > if nobody is using the GstVideoOverlay interface on OSX nowadays as > > there are better ways for native OSX applications now. > > I would be very grateful if you would tell me what these better ways > are. > > All I want to do is use GStreamer to display video in the right place > within a window on Mac OSX - surely this is a very normal thing to > do? can probably not use it when you're using wxwidgets (it depends on what wxwidgets allows you to do). It works by setting the CALayer of a view to what the sink is providing. Independent of all that, we should nonetheless make sure that the GstVideoOverlay interface of glimagesink works on OSX. So if you can provide a testcase for the problem there, that would be great. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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In reply to this post by Andy Robinson
On Do, 2016-01-14 at 11:24 +0000, Andy Robinson wrote:
> On 13/01/16 20:34, Sebastian Dröge wrote: > > It was definitely working a longer time ago but I wouldn't be > > surprised > > if nobody is using the GstVideoOverlay interface on OSX nowadays as > > there are better ways for native OSX applications now. > > I would be very grateful if you would tell me what these better ways > are. > > All I want to do is use GStreamer to display video in the right place > within a window on Mac OSX - surely this is a very normal thing to > do? http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/tests/examples/gl/cocoa Try if this one works for you and let us know! There's also this example: http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/tests/examples/avsamplesink The CoreAnimation sink would be used the same way, you can find it in the "opengl" plugin as caopengllayersink. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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On Sa, 2016-01-16 at 14:11 +0000, Andy Robinson wrote:
> [...] > and it works! Fantastic, thank you. Possibly the documentation for > GstVideoOverlay should indicate that that's not really the way to do > it on Mac these days. It depends a bit on your use case, but there are still valid use cases for GstVideoOverlay and it's supposed to work :) > > I just noticed that we also have a Cocoa example using > > GstVideoOverlay: > > http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/tests/ex > > amples/gl/cocoa > > I did look briefly at this but it wouldn't compile - various problems > - > and the copyright message in the file is 2009 so maybe it needs > updating (or dumping). How does it fail to compile? From shortly looking over the code it looks all good and was just updated in the middle of last year. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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On Di, 2016-01-19 at 14:49 +0000, Andy Robinson wrote:
> On 18/01/16 14:04, Sebastian Dröge wrote: > > > > I just noticed that we also have a Cocoa example using > > > > GstVideoOverlay: > > > > http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/test > > > > s/ex > > > > amples/gl/cocoa > > > > > > I did look briefly at this but it wouldn't compile - various > > > problems > > > - > > > and the copyright message in the file is 2009 so maybe it needs > > > updating (or dumping). > > > > How does it fail to compile? From shortly looking over the code it > > looks all good and was just updated in the middle of last year. > > I have a test project in which the avsamplebufferlayersink compiles > and runs with no problems. When I try the same with the > GstVideoOverlay example I get: > > /Users/andy/Temp2/vidsinktest/vidsinktest/main.m:278:49: > 'NSAutoreleasePool' is unavailable: not available in automatic > reference counting mode counting). It's using explicit reference counting. -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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Re: Using GstVideoOverlay on Mac
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In reply to this post by doon
On So, 2016-03-06 at 17:37 -0800, doon wrote:
> > Hi, Andy. > Could you share the include part of your code? And how do you > installed GDK on OS X? Because I can't find <gdk/gdkx.h> and I can't > find how to install GDK on OS X. Do you want to use GDK/GTK with the X11 backend on OSX? Probably not. In that case you want gdk/gdkquartz.h See this for a GTK2 example: https://cgit.freedesktop.org/~slomo/gst-sdk-tutorials/tree/gst-sdk/tutorials/basic-tutorial-5.c Look for GDK_WINDOWING_QUARTZ. This part is the same on GTK3, other parts there might be different. Search for GDK_WINDOWING_QUARTZ in here for a GTK3 example, but that's a more complex application: https://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/tests/examples/playback/playback-test.c -- Sebastian Dröge, Centricular Ltd · http://www.centricular.com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Using GstVideoOverlay on Mac
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