AW: Overlay peak value on video

[Thornton, Keith]

This topic would also interest me as I am interested in overlaying a frame count into each frame.

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Paul Barber
Gesendet: Freitag, 6. März 2015 12:30
An: gstreamer-devel at lists.freedesktop.org
Betreff: Overlay peak value on video

Hello.

What do you think would be the best way to write an element that makes some measurement on the video buffer (say the peak RGB values) and then overlays that measurement onto the video itself?

Making the measurement is no problem. I have used the template filter plugin, access the buffer and detect the peak values in the video chain function.
I am also aware of the textoverlay element which will overlay static text or via the text sink .
Can I make an element that will act as a text src for the textoverlay text sink?
Can I push text out on a text src pad from within the video chain function?
Or is there a better way?
Cheers,
Paul.
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