WebRTC V8/WebM

[exander]

Hi, what is the support of WebRTC in Firefox or Chromium?

When I do:

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uv4l --driver raspicam --auto-video_nr --encoding h264 --width 640 --height 480

Camera is correctly recognized in Firefox (getUserMedia), but not in Chromium, but then I get an error.

[exander]

Anyone has any knowledge about this?

[ghans]

Tried the official driver instead ?

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sudo modprobe bcm2835-v4l2

ghans

[towolf]

Chromi does not (yet) support H.264 in WebRTC.

[exander]

Chromi does not (yet) support H.264 in WebRTC.

Yes, I figured that out, so I am mainly testing in Firefox.

[exander]

Tried the official driver instead ?

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sudo modprobe bcm2835-v4l2

ghans

Tried that, it worked once. But it is not working now.

Also, when I turn on camera, my display goes black. Could it be low amps powersource? I have 2A.

[towolf]

I’ve tried to look into WebRTC and got a simple demo working fine.

Found a short introduction into simple Janus WebRTC server and decided to try it out.

• Compiled the "janus" server (on Arch, so no instructions I can give for Raspbian, but it is in the README)
  
  ./configure line I used was

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  ./configure --prefix=/opt/janus --disable-websockets --disable-data-channels --disable-rabbitmq --disable-docs

• Changed in renamed /opt/janus/etc/janus/janus.cfg

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  [general]
  configs_folder = /opt/janus/etc/janus		; Configuration files folder
  plugins_folder = /opt/janus/lib/janus/plugins		; Plugins folder
  

• Changed in renamed /opt/janus/etc/janus/janus.plugin.streaming.cfg

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  [gst-raspicam]
  type = rtp
  id = 1
  description = H.264 live streaming from Raspicam
  audio = no
  video = yes
  videoport = 8004
  videopt = 96
  videortpmap = H264/90000
  videofmtp = profile-level-id=42e028\;packetization-mode=1
  

  Every other default stream commented out
• Copy janus/html subdirectory to web root /www/janus of my nginx web server. Internal web server of janus is for webrtc signaling, not for "demo" files and menus. I used separate nginx web server for those files in janus/html. nginx serves on port 80, and janus internal web server serves on port 8088. This agrees with included demo setup.
• Then ran stream with GStreamer 1.0 gst-launch in one SSH shell

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  raspivid --verbose --nopreview --width 640 --height 480 --framerate 15 --bitrate 1000000 --profile baseline --timeout 0 -o - | gst-launch-1.0 -v fdsrc !  h264parse ! rtph264pay config-interval=1 pt=96 ! udpsink host=127.0.0.1 port=8004

  Would prefer v4l2 driver, but that isn’t working anymore right now. Uv4l driver not suitable.
• Finally start janus server in another SSH shell

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  /opt/janus/bin/janus -F /opt/janus/etc/janus/

Finally go to Firefox (I have Firefox 36.0) and go to <http://raspberrypi.lan/janus> (substitute hostname for what your Rpi is named). Naviate to "Demos" then "Streaming". Select Stream and Start it. It will show this:


It is quite low latency. Not as low as « gst-launch udpsink | gst-launch udpsrc ». I made simple test with on-screen clock:






Seems to be 300-600 ms delay. I get 150-200ms delay with pure GStreamer RTP pipelines.

[RpiName]

what is the support of WebRTC in Firefox or Chromium?

When I do:

Code: Select all

uv4l --driver raspicam --auto-video_nr --encoding h264 --width 640 --height 480

Camera is correctly recognized in Firefox (getUserMedia), but not in Chromium, but then I get an error.

According to a previous announcement at the UV4L homepage, UV4L will soon (also) be native webrtc client itself. So hopefully it will be possible to access the camera in real-time from anywhere with any browser.

[RpiName]

You may want to follow this post for WebRTC with UV4L:

http://www.raspberrypi.org/forums/viewt ... 3&t=105019

[deivid]

At the moment I'm using a pi 1 (seems like my new pi2 broke) streaming h264+aac over rtmp.
I'd like to use janus to "convert" a file (later it'll be the rtmp feed) to "webrtc"

I've disabled the audio on ffmpeg because I don't know how to deal with it on gstreamer. Could you help me? (I know ffmpeg, never used gstreamer)

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ffmpeg -re -i clase.mp4 -c:v libx264 -g 8 -vprofile baseline -an -f h264 pipe:1 | gst-launch-1.0 -v fdsrc !  h264parse ! rtph264pay config-interval=1 pt=96 ! udpsink host=127.0.0.1 port=8004