Dynamic content in qroverlay?

[Florian Echtler]

Alright, thanks - I'll have to stick with 1.20 for now, so I'll make do with 
debugqroverlay.

Best, Florian

On 02.03.23 20:52, Thibault Saunier wrote:
> Hi,
> 
> 
> Since 1.22 the qroverlay supports setting per buffer overlay based on
> GstCustomMeta. You can find it mentioned in the documentation:
> https://gstreamer.pages.freedesktop.org/-/gstreamer/-/jobs/37354974/artifacts/documentation/qroverlay/qroverlay.html?gi-language=c#qroverlay
> 
> In the end this means that instead of trying to set the property in the
> probe you should add a `GstQROverlayMeta` on the buffer with the values
> specified in the documentation.
> 
> Regards,
> 
> Thibault
> 
> On Thu, 2023-03-02 at 12:38 +0100, Florian Echtler via gstreamer-devel
> wrote:
>> Hello everyone,
>>
>> I've fiddled around with including buffer-specific data in a video
>> stream using
>> qroverlay (somewhat like a custom version of debugqroverlay, which
>> I'm using for
>> now). I tried the following code snippet:
>>
>> # pad probe for debug QR code with timestamp
>> def qr_probe_callback(pad,info,pdata):
>>       buf = info.get_buffer()
>>       parent = pad.get_parent_element()
>>       parent.set_property("data",str(buf.pts))
>>       return Gst.PadProbeReturn.OK
>>
>> [... and afterwards ...]
>>
>>       sinkpad = qroverlay.get_static_pad("sink")
>>       sinkpad.add_probe(Gst.PadProbeType.BUFFER, qr_probe_callback,
>> None)
>>
>> The pad probe gets called, but the QR code in the video stream seems
>> to be stuck
>> on the very first value that got set when the callback was triggered
>> for the
>> first time. What do I need to do to "re-render" the QR code with the
>> updated
>> data property?
>>
>> Best, Florian
>> -- 
>> SENT FROM MY DEC VT50 TERMINAL
> 

-- 
SENT FROM MY DEC VT50 TERMINAL

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