When I use videoflip the video looks like slowly. and bitrate only half of setting

General Discussion
1

My hardware is rpi CM4
system is linux 6.1
1.if I use tc358743 hdmi to csi.
add videoflip method=3 like this

 gst-launch-1.0 -vvv v4l2src !  "video/x-raw,width=1920,height=1080,framerate=30/1,format=UYVY" !  videoflip method=3 ! \
 v4l2h264enc extra-controls="controls,h264_profile=4,h264_level=13,video_bitrate=6560000;" ! "video/x-h264,profile=high, level=(string)4.2" ! h264parse config-interval=1 ! queue ! \

the video output looks slowly.and alse bitrate reduce a half.
if rotate 180, output looks normal. bitrate reduce a half
2.if I usb UVC mode get signal from usb camera.
it works well ,but alse reduce a half bitrate.

CPU usage only 40%

2

the video record linkis ,use right click store as
www.ooidea.com.cn/file.mkv