[gst-devel] v4l2src & glupload at only 12 FPS?

[Julien Isorce]

pastbin you glxinfo

and also  run:

GST_DEBUG=gldisplay:3   v4l2src ....

Julien

2010/3/5 Alexandre Quessy <alexandre at quessy.net>

> Hello Julien and the list,
>
> Julien Isorce wrote:
> > Hi,
> >
> > And if using gst-launch ? ( v4l2src ! ... ! glupload ! glfilterglass !
> > glimagesink )
> >
>
> Without the glfilterglass element, it look ok. Here the output with the
> verbose flag on: http://pastebin.com/MrjEQ5Tc
>
> If I add the glfilterglass element, the image is totally black. Here is
> the output : http://pastebin.com/pzcxfYRz
>
> Here is the command I have issued. The first time, it was without the
> glfilterglass element.
>
> $ gst-launch -v v4l2src ! video/x-raw-yuv, format=\(fourcc\)I420,
> framerate=\(fraction\)25/1, width=640, height=480 ! ffmpegcolorspace !
> glupload  ! glfilterglass ! glimagesink
>
> I am not sure about how to read the actual frame rate, though. Any hint?
>
> Thanks,
> Alex
>
>
> > Julien
> >
> > 2010/3/3 Alexandre Quessy <alexandre at quessy.net>
> >
> >> Hello everyone,
> >> I have worked on a prototype of a pipeline that uploads a live video
> >> feed to an OpenGL texture and shares it with a context in SDL,
> >> starting from the tests/examples/sdlshare.c file in gst-plugins-gl.
> >> The source code can be found at
> >> http://bitbucket.org/aalex/toonloop1/src/tip/src/sdlshare.cpp and can
> >> be compiled with the autotools.
> >> (./autogen.sh && ./configure && make)
> >>
> >> It seems like the mesured framerate is consistently pretty slow. I get
> >> an average of 12 FPS on a Dual 2.2 GHz with the latest Ubuntu and a
> >> decent Nvidia graphic card. I obtained 30 FPS on a faster machine with
> >> a better V4L2-supported video capture card.
> >>
> >> Does someone have suggestions on how I could overcome this ? I would
> >> also prefer to have a framerate that's faster than the capture card's.
> >> 29.97 FPS is what NTSC gives me, whereas most projectors and monitors
> >> can do up to 60 FPS. I have tried to set the "sync" property of the
> >> fakesink element to FALSE, or TRUE, without success. Any other hint ?
> >>
> >> --
> >> Alexandre Quessy
> >> http://alexandre.quessy.net/
> >>
> >>
> >>
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> >
> >
> > ------------------------------------------------------------------------
> >
> >
> ------------------------------------------------------------------------------
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> >
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> ------------------------------------------------------------------------------
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> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
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