Comments (2)
mikhail-nikolskiy
commented on May 20, 2024
3
You will need to assign different (unique) name in each channel, ex
channel#1: ... ! gvawatermark name=gvawatermark1 ! ...
channel#2: ... ! gvawatermark name=gvawatermark2 ! ...
then you can set callback for each channel (in the loop)
pad = pipeline.get_by_name("gvawatermark1").get_static_pad("src")
pad.add_probe(Gst.PadProbeType.BUFFER, pad_probe_callback)
pad = pipeline.get_by_name("gvawatermark2").get_static_pad("src")
pad.add_probe(Gst.PadProbeType.BUFFER, pad_probe_callback)
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mliu2020
commented on May 20, 2024
Hi @vtpl1
Sorry for the late response, I think you can figure out from the message object, it has a "src" field.
You can check MessageType in call back and check the channel info.
https://gstreamer.freedesktop.org/documentation/gstreamer/gstmessage.html?gi-language=python#GstMessageType
Mark
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