gstreamer-1.0 camera preview flickering

[riteshSTPL]

i am using nvidia Jetson-TX1 board with gstreamer-1.0 v1.2.4.

Below is pipeline 

//Camera preview
gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw, width=1920,
height=1080, format=UYVY, framerate=60/1' \
! nvvidconv ! 'video/x-raw(memory:NVMM), width=1920, height=1080,
format=I420, framerate=60/1' \
! nvoverlaysink sync=false


// camera preview+textoverlay
gst-launch-1.0 v4l2src device=/dev/video0 \
! textoverlay text="Recording..." halignment=0 valignment=1 \
! 'video/x-raw, width=1920, height=1080, format=UYVY, framerate=60/1' \
! nvvidconv ! 'video/x-raw(memory:NVMM), width=1920, height=1080,
format=I420, framerate=60/1' \
! nvoverlaysink sync=false


I am getting Flickering on camera preview with or without textoverlay. But
in preview without textoverlay its not too noticeable. But when i on add
textoverlay, flicking highlighted due to textoverlay.

This flickering happens with also with videotestsrc
gst-launch-1.0 videotestsrc \
! textoverlay text="Recording..." halignment=0 valignment=1 \
! 'video/x-raw, width=1920, height=1080, format=UYVY, framerate=60/1' \
! nvvidconv ! 'video/x-raw(memory:NVMM), width=1920, height=1080,
format=I420, framerate=60/1' \
! nvoverlaysink sync=false


I have also tried to replace nvvidconv with videoconvert and nvoverlaysink
with autovideosink but still flickers.

but when i remove UYVY format from above pipeline *no flickers*
gst-launch-1.0 videotestsrc \
! textoverlay text="Recording..." halignment=0 valignment=1 \
! videoconvert ! 'video/x-raw, width=1920, height=1080, format=I420,
framerate=60/1' \
! nvoverlaysink sync=false

 
for my camera v4l2 i have to use UYVY to I420 conversion in order to view
video so any other workaround? 



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