General WebRTC tips and tricks collated over time

README.md

Chrome Flags

This information source from the following url:

http://peter.sh/experiments/chromium-command-line-switches/

And also in the chromium source:

https://source.chromium.org/chromium/chromium/src/+/main:media/base/media_switches.cc

Simulate Capture with a Fake Stream (test video and audio signal)

--use-fake-device-for-media-stream

Suppress the Permission Dialog

--use-fake-ui-for-media-stream

Use a raw video file rather than test media stream

--use-fake-ui-for-media-stream

See my bash alias for an example...

NOTE: No audio as far as I can tell.

Debug Logging

--enable-logging --v=1 --vmodule=*source*/talk/*=3

Bash Alias

# initialise the chrome alias
alias chrome="rm -rf $HOME/.config/chrome-test && google-chrome --console --no-first-run --user-data-dir=$HOME/.config/chrome-test --use-fake-device-for-media-stream --use-file-for-fake-video-capture=/home/doehlman/testvideo.y4m --enable-logging --v=1 --vmodule=*third_party/libjingle/*=3,*=0"

WebRTC Project Source Files of Interest

Constraints Available in Chrome

/talk/app/webrtc/mediaconstraintsinterface.h

Debugging in Firefox

Starting firefox with logging (for data channels and sctp in this case):

NSPR_LOG_MODULES=datachannel:5,sctp:5 /opt/browsers/firefox/stable/firefox http://localhost:9966/

chrome_debug.log file is found in the User's Home directory under:
AppData/Local/Google/Chrome/

Note that this directory is not shown in the Windows file explorer, so got to it via cmd.com .
You can use NotePad to view it.

For OSX:

alias chrome="rm -rf $HOME/.config/chrome-test && /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --console --no-first-run --user-data-dir=$HOME/.config/chrome-test --use-fake-device-for-media-stream --enable-logging --v=1 --vmodule=*third_party/libjingle/*=3,*=0"

Anybody have a place to find decent test videos for streams. I like to be able to see different videos for each stream so I can tell if they are correctly placed for my app. I know I can convert them with ffmpeg but figured I'd see if anybody had any luck finding pre-formatted videos that just work good. I've seen the ones on archive.org but they aren't really modern or proper resolution and things. Would be nice to get some stock footage of users chatting to use for it.

Chrome Flags
For "Use a raw video file rather than test media stream" it should be --use-file-for-fake-video-capture NOT --use-fake-ui-for-media-stream.