how does the streaming video plugin gstreamer script work

[Wilbert Jackson]

I am new to gstreamer and got a script working that performs screen captures to a file. Next step is to send screen captures to peers using the video streaming plugin. I looked at the test script used in the video streaming plugin demo but do not understand where it gets the video file it streams from. Could someone please briefly explain how it works, and what I need to modify in the screen capture script to stream screens to peers.

Thanks

Wilbert Jackson

Screen capture script

gst-launch-0.10 ximagesrc use-damage=0 ! video/x-raw-rgb,framerate=15/1 ! ffmpegcolorspace ! vp8enc threads=4 quality=10 speed=7 ! mux. pulsesrc ! audio/x-raw-int ! queue ! audioconvert ! vorbisenc ! mux. matroskamux name=mux ! filesink location=test5.mkv

Video Streaming Plugin test script

gst-launch \

audiotestsrc ! \

audioresample ! audio/x-raw-int,channels=1,rate=16000 ! \

opusenc bitrate=20000 ! \

rtpopuspay ! udpsink host=127.0.0.1 port=5002 \

videotestsrc ! \

video/x-raw-rgb,width=320,height=240,framerate=15/1 ! \

videoscale ! videorate ! ffmpegcolorspace ! timeoverlay ! \

vp8enc bitrate=256000 speed=2 max-latency=1 error-resilient=true ! \

rtpvp8pay ! udpsink host=127.0.0.1 port=5004

[Lorenzo Miniero]

That's a question for the gstreamer lists, especially if you're not familiar with how the gstreamer pipelines work.

Cheers,

Lorenzo

[Mikael Boman]

Forgot to mention to make sure to use vp8+opus, not vorbis, for webm.

/M

On Thursday, October 8, 2015 at 9:57:11 PM UTC+2, Mikael Boman wrote:

Not sure what you what the problem is, but I never got Gstreamer to stream opus audio properly, so I used ffmpeg instead. Just make sure the opus is not any weird format like 5.1 - if so reduce it to 2 ch stereo. What I did was to transcode video/audio stream it to webm (vp8+opus) and then stream:

ffmpeg -re -i infile.webm -vcodec copy -an -f rtp rtp://127.0.0.1:5004 -vn -acodec copy -f rtp rtp://127.0.0.1:5002

/M