How to stream desktop screen

[xav12358]

Hello,

I want to stream the screen of my computer to and other using gstreamer and
generate an rtsp adresse to use in Opencv.


I try few example to stream webcam between computers and it works properly:
    <code>
    Command on the remote computer
    gst-launch-1.0 -v v4l2src device=/dev/video1 ! "image/jpeg,width=1280,
height=720,framerate=30/1" ! rtpjpegpay ! udpsink host=192.168.1.17
port=5001

    Command on the local computer
    gst-launch-1.0 -e -v udpsrc port=5001 ! application/x-rtp,
encoding-name=JPEG,payload=26 ! rtpjpegdepay ! jpegdec ! autovideosink
     </code>


I saw some example which display current desktop but I don't now how to
create rtsp adresse from it and  when I just want to stream the current
desktop I get nothing in the other terminal:

    gst-launch-1.0 -v ximagesrc ! video/x-raw,framerate=20/1 ! videoscale !
videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast !
rtpmp4vpay  ! udpsink host=192.168.1.17 port=5000


    NOTHING APPEAR IN THAT TERMINAL
    gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp,
media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264,
payload=(int)96" ! rtph264depay ! decodebin ! videoconvert ! autovideosink


Here is the result I have in the first terminal:
    <code>

gst-launch-1.0 -v ximagesrc ! video/x-raw,framerate=20/1 ! videoscale !
videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast !
rtph264pay  ! udpsink host=127.0.0.1 port=5000
Définition du pipeline à PAUSED...
Le pipeline est actif et n’a pas besoin de phase PREROLL…
Passage du pipeline à la phase PLAYING…
New clock: GstSystemClock
/GstPipeline:pipeline0/GstXImageSrc:ximagesrc0.GstPad:src: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstVideoScale:videoscale0.GstPad:src: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps =
video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)20/1,
format=(string)Y444, pixel-aspect-ratio=(fraction)1/1
Redistribution de latence…
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps = video/x-raw,
width=(int)1920, height=(int)1080, framerate=(fraction)20/1,
format=(string)Y444, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstVideoScale:videoscale0.GstPad:sink: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps =
video/x-raw, format=(string)BGRx, width=(int)1920, height=(int)1080,
framerate=(fraction)20/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264,
codec_data=(buffer)01f40028ffe1001e67f40028919680780227e27016a02020280000030008000003014478c19501000468ef3192,
stream-format=(string)avc, alignment=(string)au, level=(string)4,
profile=(string)high-4:4:4, width=(int)1920, height=(int)1080,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)20/1,
interlace-mode=(string)progressive, colorimetry=(string)bt709,
chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, packetization-mode=(string)1,
profile-level-id=(string)f40028,
sprop-parameter-sets=(string)"Z/QAKJGWgHgCJ+JwFqAgICgAAAMACAAAAwFEeMGV\,aO8xkg\=\=",
payload=(int)96, ssrc=(uint)1850617788, timestamp-offset=(uint)3214623554,
seqnum-offset=(uint)16401, a-framerate=(string)20
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, packetization-mode=(string)1,
profile-level-id=(string)f40028,
sprop-parameter-sets=(string)"Z/QAKJGWgHgCJ+JwFqAgICgAAAMACAAAAwFEeMGV\,aO8xkg\=\=",
payload=(int)96, ssrc=(uint)1850617788, timestamp-offset=(uint)3214623554,
seqnum-offset=(uint)16401, a-framerate=(string)20
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps =
video/x-h264,
codec_data=(buffer)01f40028ffe1001e67f40028919680780227e27016a02020280000030008000003014478c19501000468ef3192,
stream-format=(string)avc, alignment=(string)au, level=(string)4,
profile=(string)high-4:4:4, width=(int)1920, height=(int)1080,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)20/1,
interlace-mode=(string)progressive, colorimetry=(string)bt709,
chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: timestamp = 3214623853
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: seqnum = 16401
    </code>


And in the receiver terminal:
    <code>

gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp,
media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264,
payload=(int)96" ! rtph264depay ! decodebin ! videoconvert ! autovideosink
Définition du pipeline à PAUSED...
Le pipeline est actif et n’a pas besoin de phase PREROLL…
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, payload=(int)96
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, payload=(int)96
Passage du pipeline à la phase PLAYING…
New clock: GstSystemClock
    <code>





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