Gstreamer: Appsink output contains extra lines?

[kskill]

I have prepared a sample code to pull images from file src.Pull images
contains lines on the topCan any one guide me into this.pipeline =
gst_parse_launch("filesrc location=/bunny-1080.mp4 !" "qtdemux !" "h264parse
!" "v4l2h264dec capture-io-mode=4 !" "v4l2convert output-io-mode=5
capture-io-mode=4 !" "capsfilter caps=\"video/x-raw, format=BGR\" !"
"appsink name=appsink", NULL); Extra lines only generated if i add
output-io-mode=5 in v4l2convert plugin.Input : bunny.mp4 
https://streamable.com/o09pls <https://streamable.com/o09pls>  Output : 
https://i.stack.imgur.com/n87yY.jpg <https://i.stack.imgur.com/n87yY.jpg> 
Same problem arises when run using gst-launch-1.0gst-launch-1.0 filesrc
location=/bunny-1080.mp4 ! qtdemux !  h264parse ! v4l2h264dec
capture-io-mode=4 !  v4l2convert output-io-mode=5 capture-io-mode=4 !
capsfilter caps=video/x-raw,format=BGR ! jpegenc ! multifilesink
location=img%d.jpg



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