Pipeline freeze if one of the input is inacive

[Vnd]

All,

I am using input-selector to switch between two input. When both the inputs
are active switching is working as expected.

But pipeline will not start if one of the input is missing. decodebin with
no input is blocking the pipeline pre-rolling. Same is seem with decodebin3
too. I have used 1.12.1 for testing.

gst-launch-1.0 \
udpsrc port=6000 ! decodebin ! video/x-raw ! insel.sink_0 \
udpsrc port=6002 ! decodebin ! video/x-raw ! insel.sink_1 \
input-selector sync-streams=false name=insel ! checksumsink


Below pipeline works even if second input is not active. I am suspecting
decodebin(3) in above pipeline. 

gst-launch-1.0 \
udpsrc port=6000 ! insel.sink_0 \
udpsrc port=6002 ! insel.sink_1 \
input-selector sync-streams=false name=insel ! checksumsink

What could be the problem ??






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