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

[Julien Isorce]

2010/3/5 Tristan Matthews <tristan at sat.qc.ca>

> 2010/3/5 Julien Isorce <julien.isorce at gmail.com>
>
>> What does "is-live" mean exactly ?
>>
>
> It's a property inherited from GstBaseSrc. From the documentation:
>
> A live source will not produce data in the PAUSED state and will therefore
>> not be able to participate in the PREROLL phase of a pipeline. To signal
>> this fact to the application and the pipeline, the state change return value
>> of the live source will be GST_STATE_CHANGE_NO_PREROLL.
>>
>
> see
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSrc.html#gst-base-src-set-live
>
> It's useful here because it makes the videotestsrc behave like a live
> source (like v4l2src and dc1394src), and thus i can recreate the same bug
> with it (the black window when used with glfilterglass). It's worth noting
> that the glfiltersobel plugin does work fine with live sources, so I don't
> think the problem with glfilterglass is specifically because it uses
> shaders.
>
> ok

I can't reproduce it so (-> it works for me with is-live set to false or
true). (I'm using gst 0.10.25)
I'll try next week (I have an other configuration)

Julien


> -t
>
>
>>> -tristan
>>>
>>>
>>>
>>>> Julien
>>>>
>>>>
>>>>>
>>>>>
>>>>>
>>>>>>
>>>>>>
>>>>>>>  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.cppand 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/
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>> >> Download Intel&#174; Parallel Studio Eval
>>>>>>>> >> 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
>>>>>>>> >> _______________________________________________
>>>>>>>> >> gstreamer-devel mailing list
>>>>>>>> >> gstreamer-devel at lists.sourceforge.net
>>>>>>>> >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>>>>>> >>
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> ------------------------------------------------------------------------
>>>>>>>> >
>>>>>>>> >
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>> > Download Intel&#174; Parallel Studio Eval
>>>>>>>> > 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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>>>>>>>> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>>>>>>
>>>>>>>>
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>> Download Intel&#174; Parallel Studio Eval
>>>>>>>> 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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>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> Download Intel&#174; Parallel Studio Eval
>>>>>>> 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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>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Tristan Matthews
>>>>>> email: tristan at sat.qc.ca
>>>>>> web: http://tristanswork.blogspot.com
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Tristan Matthews
>>>>> email: tristan at sat.qc.ca
>>>>> web: http://tristanswork.blogspot.com
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Download Intel&#174; Parallel Studio Eval
>>>>> 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
>>>>> _______________________________________________
>>>>> gstreamer-devel mailing list
>>>>> gstreamer-devel at lists.sourceforge.net
>>>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>>>
>>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Download Intel&#174; Parallel Studio Eval
>>>> 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
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.sourceforge.net
>>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>>
>>>>
>>>
>>>
>>> --
>>> Tristan Matthews
>>> email: tristan at sat.qc.ca
>>> web: http://tristanswork.blogspot.com
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Download Intel&#174; Parallel Studio Eval
>>> 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
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>
>>>
>>
>>
>> ------------------------------------------------------------------------------
>> Download Intel&#174; Parallel Studio Eval
>> 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
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>
>>
>
>
> --
> Tristan Matthews
> email: tristan at sat.qc.ca
> web: http://tristanswork.blogspot.com
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> 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
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
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