GstSEIMetadata/Performance

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All the following pipelines were tested on a Xavier NX, the cpu load in all cases was around 20%-23%. Elements from the GstSEI plugin didn't have a noticeable effect on the CPU usage. 

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! perf ! fakesink

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! seimetatester ! perf ! fakesink

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! seimetatester ! seiinject metadata="Hello World" ! perf ! fakesink

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! seimetatester ! seiextract ! perf ! fakesink

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! seimetatester ! seiinject metadata="Hello World" ! seiextract ! perf ! fakesink

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, framerate=(fraction)30/1, format=(string)NV12" ! nvvidconv ! nvv4l2h264enc bitrate=4000000 control-rate=constant_bitrate iframeinterval=30 ! seimetatester ! seiinject metadata="Hello Worldaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ! seiextract ! perf ! fakesink
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