low fps for 4k video when videorate element is in place

[mehdi semsarzadeh]

Dear All,
here is the pipeline that I am using:

appsrc name=videoSrc format=3 stream-type=0 ! video/x-raw,
format=(string)UYVY, width=3840, height=2160 ! videorate name=videorate0 !
video/x-raw, framerate=30/1 !nvvidconv name=videoConvert !
video/x-raw(memory:NVMM), format=I420 ! omxh264enc name=h264enc  !
video/x-h264, stream-format=byte-stream ! appsink name=appsink0

As I run the pipeline, fps starts dropping and eventually it goes under 1.
When I remove the "videorate" element fps stays around 11.
I have set the "skip-to-first" property of videorate to true in my code, is
there any other setting that I missing for "videorate" element?
Any idea, about the cause of this issue?

Thanks
Mehdi
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