gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink

gst-launch-1.0 -v gdiscreencapsrc  ! queue  ! videoconvert !  video/x-raw,format=I420 ! jpegenc ! rtpjpegpay ! queue ! udpsink host=172.16.15.147 port=8554 

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstGDIScreenCapSrc:gdiscreencapsrc0.GstPad:src: caps = video/x-raw, format=(string)BGR, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-raw, format=(string)BGR, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, format=(string)BGR, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420
/GstPipeline:pipeline0/GstJpegEnc:jpegenc0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, format=(string)BGR, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstJpegEnc:jpegenc0.GstPad:src: caps = image/jpeg, sof-marker=(int)0, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstRtpJPEGPay:rtpjpegpay0.GstPad:src: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, a-framerate=(string)30.000000, payload=(int)26, ssrc=(uint)665894884, timestamp-offset=(uint)2085395382, seqnum-offset=(uint)6071
/GstPipeline:pipeline0/GstQueue:queue1.GstPad:sink: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, a-framerate=(string)30.000000, payload=(int)26, ssrc=(uint)665894884, timestamp-offset=(uint)2085395382, seqnum-offset=(uint)6071
/GstPipeline:pipeline0/GstQueue:queue1.GstPad:src: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, a-framerate=(string)30.000000, payload=(int)26, ssrc=(uint)665894884, timestamp-offset=(uint)2085395382, seqnum-offset=(uint)6071
/GstPipeline:pipeline0/GstQueue:queue1.GstPad:src: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, a-framerate=(string)30.000000, payload=(int)26, ssrc=(uint)665894884, timestamp-offset=(uint)2085395382, seqnum-offset=(uint)6071
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG, a-framerate=(string)30.000000, payload=(int)26, ssrc=(uint)665894884, timestamp-offset=(uint)2085395382, seqnum-offset=(uint)6071
/GstPipeline:pipeline0/GstRtpJPEGPay:rtpjpegpay0: timestamp = 2085395391
/GstPipeline:pipeline0/GstRtpJPEGPay:rtpjpegpay0: seqnum = 6294