Accessing video RGB data

[Stefan Sauer]

On 10/16/2011 01:50 PM, Sami Pietilä wrote:
> Hi,
>
> How can I turn sync off on the sink?
>
> I tried: g_object_set (G_OBJECT (sink), "synchronous", false, NULL);
c'mon. Does "gst-inspect ximagesink" show you a property called
"synchronous". No! What about using the property called "sync" instead.
Magic

Stefan
> Sink is "ximagesink".
>
> Frames are still being dropped.
>
> 2011/10/8 Stefan Sauer <ensonic at hora-obscura.de>:
>> On 10/07/2011 02:20 PM, Erick Pérez wrote:
>>>>> I don't need to modify movie frames, but I need to read them and do
>>>>> some calculations. Calculations might take some time, so I need a way
>>>>> to control how gstreamers feeds the frames. That is, I need a way to
>>>>> ask next frame from gstreamer instead of gstreamer feeding them at a
>>>>> constant rate.
>>>>>
>>>>> How can I get a new frame only when requested?
>>>> In your pad_probe just do the calculation as you need. ximagesink will
>>>> throw away late frames. A smarter way might be to do:
>>>>
>>>> ... ! colorspace ! tee name = t ! queue leaky=upstream ! appsink
>>>>                                              t. ! queue ! ximagesink
>>>>
>>>> This way you can use get the frames from appsink (better that using
>>>> pad-probes or fakesink with the handoff signal). Also the playback gets
>>>> not disturbed and you process the frames on appsink as you manage. All
>>>> other frames get dropped.
>>> Hey, I'm in the same situation, I want to get the frames, and I know I
>>> can manage the frame rate by using something videorate element, but
>>> that will drop frames. I want to process some stuff for every frame on
>>> the picture, so I need to slow down the frame rate playback sometimes,
>>> but without losing frames. I've seen a way to slow down the playback
>>> using gnonlin filesource element, but that doesn't convince me either.
>>> Is there other way ?
>>>
>> If you don't want to drop frames and just process frames as fast as you
>> can turn sync off on the sink.
>>
>> Stefan
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