proper way to change element's caps in pipeline on runtime

[Nirbheek Chauhan]

On Thu, Apr 7, 2022 at 12:15 PM Byunghun Lee via gstreamer-devel
<gstreamer-devel at lists.freedesktop.org> wrote:
>
> Hi dev.
> Now I'm trying to change framerate of rtsp stream on runtime.
> My test pipeline is like below.
>
> rtspsrc ! depayloader ! decoder ! videorate ! video/x-raw,framerate=15/1 ! f.sink_1 \
> rtspsrc ! depayloader ! decoder ! videorate ! video/x-raw,framerate=15/1 ! f.sink_2 \
> funnel name=f ! videoscale ! videoconvert ! video/x-raw,width=640,height=384,format=RGB ! tensor_converter ! fakesink
>
> After running pipeline 20sec,
> I changed two capsfilter "video/x-raw,framerate=15/1" to "video/x-raw,framerate=1/1".
> Other elements reconfigured well after changing capsfilter, But the third party plugin element "tensor_converter" doesn't perform reconfiguring process.
>

The simple answer here is that tensor_converter needs to be able to
handle caps events and renegotiate accordingly. There's nothing you
can do from the outside to make that work correctly.

Cheers,
Nirbheek