There are still a bunch of edge cases and issues with reconnection
scenarios for video:
- Signaling socket refuses to reconnect once maxRetries expire
- Race conditions on local stream attachment: local camera wouldn't be
correctly rendered _if_ the attached stream existed _without_ video
tracks yet
- Video tracks leak on local streams when replacing them (virtual bgs)
- Completely ignoring Meteor state when trying to reconnect cameras
- Streams aren't proactively stopped when the signaling socket dies
- Outbound request queues aren't isolated by stream nor are they
flushed when a newer peer with the same ID is created
- Server originated negotiation errors won't trigger a local peer
cleanup - thus leaving dangling peers that take way too long to
reconnect
This commit fixes or improves all of the aforementioned issues, +:
- Remove unused arguments in the peer (client->SFU) 'start' request
- Prevent crashes when trying to render video-list-items without user
data (which might happen on re-connections)
video-provider's current ping-pong is as good as nothing in 2.5+. We
were counting on Meteor's (and consequently the component's mount state)
before 2.5 to act as a "heartbeat" as far as the socket is concerned.
The ping-pong served only to sustain traffic for finnicky,
traffic-dependant firewall.
Since 2.5, the component's state is _kind of_ detached from Meteor's -
which means it won't unmount when Meteor disconnects. That causes the
video-provider websocket to lose its borrowed heartbeat and leads to a
bunch of reconnectiong inconsistencies, the worst of them being a stuck,
useless signaling socket that will cause cameras not to work until a
client refresh.
This commit does the following:
- Implements actual heartbeat checks to trigger signaling socket
reconnects when necessary, all within the scope of video-provider
- Remove borked, eons old 'offline'/'online' event handlers: they were
causing unnecessary camera drops AND causing video-provider to
generate a stuck signaling socket
- Properly catch WebSockets.send errors
The stream state change handler in video-list-item is using a component
state reference inside a DOM event callback - which means it is always
presuming `isStreamHealthy` is false (initial value). That prevents the
health state from actually transitioning when necessary (and
consequently rendering the reconnecting view in video-list item).
This commit removes the state-based transition check in the state change
handler and unifies the reconnecting view to use the username
placeholde (replacing the loading spinners).
Firefox has a buggy ICE implementation and needs WebRTC media traffic to
be routed through a turn server to work reliably with mediasoup.
Use the information fetched by the STUN API to determine if the operator
has configured a turn server. If there is one force firefox to use it.
Closes#16164
Under some specific scenarios, the virtual background restore code might
kick in _before_ the preloaded MediaStream is actually assigned to the
peer instance. That causes a crash because the peer attachment code
(where the vbg restore is triggered) tries to access the device ID of
said MediaStream - and it is undefined in the first place because it was
only being set in after the initial offer is generated which is an async
procedure.
This commit guarantees a preloaded stream is set before the peer is
flagged as created - so it's accessible by the attachment code.
It also checks whether there's a MediaStream available when trying to
restore VBGs to prevent undefined behaviors.
RTCRTPSender exposes DSCP marking via `networkPriority` in the encodings
configuration dictionaries. That should allow us to control
QoS priorities for different media streams, eg audio with higher network
priority than video. The only browser that implements that right
now is Chromium.
To use this, the public.app.media.networkPriorities configuration in
settings.yml. Audio, camera and screenshare priorities can be controlled
separately. For further info on the possible values, see:
- https://www.w3.org/TR/webrtc-priority/
- https://datatracker.ietf.org/doc/html/rfc8837#section-5
The 'inactive' event is fired whenever the stream gets inactive (ie it
cannot be used anymore), and there are scenarios where that is
unexpected behavior and must be handled accordingly.
The main example of that is when gUM permissions are revoked by the user
via the browser's permission management panel.
Since MediaStream/Track inactive events aren't being handled in such
scenarios, what actually happens is that the camera just freezes without
further indication why.
This commit handles those scenarios in both video-preview and
video-provider by:
- 1) correctly stopping the camera (provider)
- 2) surfacing a toast (provider) or error indication (preview)
Add a new avatar component to video list item
Change the design of the components, following the new video list idea
Add icons related to the state of the user
New features:
- A simplified echo test mode that only does a local loopback (instead of
going to FS and back)
- A volume meter for microphone streams to the AudioSettings view
Those two features are experimental and disabled by default; see
public.app.media.simplifiedEchoTest and public.app.media.showVolumeMeter configs
Collateral changes:
- fix: localize fallback device strings in AudioSettings/DeviceSelector
- Refactor on some media stream utils to be re-usable across components
- Refactor in AudioSettings to keep gUM #uses stable.
* TODO: need to pass streams through AudioManager to avoid the surplus gUM.
- fix(audio): drop ScriptProcessorNode usage (deprecated)
* Used in volume meter for tracking - use hark instead
Tries to mitigate too-rapidly-switching camera profiles causing video freezes
due to encoder resets. Excluding constraints might not help a lot since
the thing that actually restarts the encoder is the bitrate change, but
they're not really important in the context of dynamic profiles.
We can't get rid of bitrate changes, though, since it's what does the actual
quality constraining.
The camera profile change debounce timer is 2.5s by default (which is
the same timer used for floor changes).
Also fixed an issue with camera profile backfiring due to badly defined peers
Include `meetingCameraCap` API param on create and enforce both server and
client to control the number of simultaneous webcams a meeting can have.
Disabled by default.
