Best way to add a filter inside PlayBin2

[Stefan Sauer]

On 02/09/2012 10:49 AM, Jacques Bride wrote:
> Hello Stefan
>
> Thanks for your reply. In other words, do you recommend that I create
> a new video sink and kind of force PlayBin2 to use it instead of the
> one used normally? The display on the OMAP4 pandaboard is handled by a
> TI custom video sink called GstPVRVideoSink and not sure I can change
> it to get same performance and platform support

You don't replace the actual sink, you just tell apps to use your bin,
which contains the effect + the actual sink.

Stefan

> Jacques
>
>> One way is to set a custom video sink, which is a bin containing your
>> effect ! autovideosink. If you can't modify the apps, you will need to
>> install that custom video sink bin and set the RANK to be e.g.
>> PRIMARY+10 so that it is automatically chosen.
> 2012/2/8 Stefan Sauer <ensonic at hora-obscura.de>:
>> On 02/08/2012 06:27 PM, Jacques Bride wrote:
>>> Hello
>>>
>>> I am developing a frame enhancement filter for the need of a video
>>> control application. I am developing on a OMAP4 pandabaord on ubuntu
>>> with the Texas Instruments hardware accelerated gstreamer pipeline
>>> (1080PPfps decode), anyhow I think my question is rather general.  I
>>> am a beginner in gstreamer so please do not hesitate to redirect me to
>>> the doc if my question is already answered somewhere.
>>>
>>> My project consists in a video filter that transforms the yuv decoded
>>> frames before being displayed (for example a sepia filter to display
>>> frames in sepia color).
>>>
>>> What is the best way to add my filter in the installed gstreamer
>>> pipeline such that it becomes part of my video chain?
>>>
>>> Please see below more details:
>>> - I wish to use the installed and omap4 optimized gstreamer/totem
>>> pipeline to enable full video stream
>>> decode and display with my filter on
>> One way is to set a custom video sink, which is a bin containing your
>> effect ! autovideosink. If you can't modify the apps, you will need to
>> install that custom video sink bin and set the RANK to be e.g.
>> PRIMARY+10 so that it is automatically chosen.
>>
>> Stefan
>>
>>> .
>>> - I created  a gstreamer plugin/element for my filter with the
>>> gst-template framework, but how to make it part of GstPlayBin2?
>>> - I looked at the pipeline graph of totem and gst-launch: they both
>>> use the playbin2 module, and I would like to add my filter in-between
>>> GstURIDecodeBin and GstPlaySink (input from src0 and output to
>>> video_raw_sink  through gstinputselector). Is is possible to add and
>>> link a new element  here without breaking the full bin? It is not
>>> either on the input or the output of playbin2 so I do not really
>>> understand how to just create a playbin2 element in my application and
>>> delicately insert a new element inside...
>>> - do I have to modify the source code of PlayBin2, add my filter,
>>> recompile and install it on my board to have my added features
>>> naturally enabled when I play videos? Or is it possible to tell
>>> existing gst-launch and totem applications to add a user filter plugin
>>> in the installed video processing?
>>>
>>> Thanks for your help
>>> Jacques
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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