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by woehrl
Thu Feb 09, 2017 10:54 am
Forum: Raspberry Pi OS
Topic: gstreamer 1.4 / gst-omx 1.2
Replies: 30
Views: 11459

Re: gstreamer 1.4 / gst-omx 1.2

I was working with my own compile of GST 1.6, 1.7 and 1.8 using gst-omx and glimagesink. Those libraries are working fine in all our released systems, so yes: gst-omx works on the RPi. I'll give the 1.10 a try now as it contains a lot of improvements for the RPi. It IS time to replace those 1.4 libr...
by woehrl
Thu Nov 19, 2015 7:56 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Re: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

Ok, I managed to have a GStreamer pipeline that - receives an h.264 encoded stream from the usb grabber (using caps) - decodes that stream hw accelerated with RPis GPU (omxh264dec) - shows the stream in an GL window (glimagesink) or on the fbdevsink $ gst-launch-1.0 v4l2src device=/dev/video0 ! 'vid...
by woehrl
Thu Nov 12, 2015 7:42 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Re: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

Ok, the initial problem stays. Qt is not capable - at the moment - to show live image of an H.264 encoded USB grabber stream.
I filed a bug report - would be glad if someone voted it up:
https://bugreports.qt.io/browse/QTBUG-49357
by woehrl
Thu Nov 12, 2015 7:36 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Re: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

YES! The Makefile did not have my LIBS variable set correctly. When I added " -lglib-2.0 -lgobject-2.0 -lgstreamer-1.0" compile did fine. But the real mistake was, that I had commented some lines in my Qt Project file above the "LIBS += ..." line. And I forgot to remove the trailing "\" at the last ...
by woehrl
Wed Nov 11, 2015 4:55 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Re: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

Thanks, but I still don't know what's the problem. What does the error message say exactly? What's wrong with glib-2.0? If I knew the desired result in the Makefile I could find a way to have it generated that way. Currently the "-L" seems to be filled with: LIBS = $(SUBLIBS) -L/opt/rpi/sysroot/opt/...
by woehrl
Wed Nov 11, 2015 11:21 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Re: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

Obviously Qt's implementation of GStreamer is still buggy. In my case I want to have an H.264 Stream coming from the USB Grabber stored to a file AND shown in a Qt (Quick) Widget. Qt can't handle this by now. And I don't see a way of piping the right options through to GStreamer. Nevertheless, GStre...
by woehrl
Wed Oct 28, 2015 3:19 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 2 + Qt 5.5 + USB Video Grabber
Replies: 7
Views: 3679

Raspberry Pi 2 + Qt 5.5 + USB Video Grabber

Hello, I spent several days now trying to get an Qt 5.5 compiled for Raspberry Pi 2 to play AND record video that is available by V4L2 from a Sensoray s2253 USB grabber card ( https://www.sensoray.com/USB_H.264_Video_Capture_2253.htm ). I'm using Luca's Build: http://thebugfreeblog.blogspot.de/ 1) I...

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