fdsrc and textoverlay not working with custom fd

[Username]

exec 3<> /tmp/foo
echo "testfdstr" >&3

gst-launch-1.0 fdsrc fd=3 do-timestamp=true ! text/x-raw,format=utf8 ! txt.
videotestsrc !  textoverlay  name=txt shaded-background=yes font-desc="Serif
40" wait-text=false !  glimagesink

Did not show anything.

But if fd=0 and I print to terminal a string is show.

All on MacOS.



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