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Don't talk SRT about my WHIP
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danjenkins
May 09, 2023
Technology
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Don't talk SRT about my WHIP
A talk given at London Video technology meet-up surrounding WHIP vs SRT.
danjenkins
May 09, 2023
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Transcript
London Video Tech - 2023-05-09 Don't talk SRT about my
WHIP Dan Jenkins Everycast Labs
Dan Jenkins WebRTC & Real Time Media Geek @dan_jenkins Founder
- Everycast Labs Organiser - CommCon
Broadcast Bridge - simplifying bringing in remote collaborators into Professional
AV Work fl ows @everycastlabs broadcastbridge.app
TONIGHT
At London <Video> Technology
The Biggest Contest of the Year
The Winner...
Will Win BIG
AND
Will be the Undisputed*... *Not so much undisputed...
UDP Media* Transport *Lies...
Introducing...
SRT vs WHIP
SRT
SRT Secure Reliable Transmission
WHIP
WHIP WebRTC HTTP Ingest Protocol
What is SRT ?
Secure Reliable Transmission
srt://foo.bar:9710 Add url params for encryption, identi fi ers, latency
Open Source Transport Developed by Haivision, currently released under the
Mozilla Public License
It is an expired IETF Draft Which isn't necessarily a
bad thing
Uses UDP Not TCP
Push or Pull
Supports encryption but isn't mandatory
Defaults to ~120ms latency
Controlled latency Which can o ff er more time to
recover from losses
Typically used for Media But doesn't have to be
Usually transports MPEG-TS And all of its subsequent parts it
supports.
But in theory could be used to transport anything
Widely Supported
FFmpeg GStreamer VLC
Vmix OBS
Platforms Support It Ingress and Egress Broadcast Bridge being one
of them
The SRT Alliance https://www.srtalliance.org/members/ Now Over 600 Members https://www.haivision.com/about/press-releases/srt-alliance-surpasses-600-members/
Cloudflare Wowza Dolby Sony Microsoft Alibaba Cloud Tencent Cloud AJA
Ateme Bitmovin Paramount Matrox Red 5 Pro Eurovision/EBU Over 600 Members
YouTube recently joined the SRT Alliance https://www.haivision.com/about/press-releases/youtube-joins-srt-alliance/
Their Interop Plugfest is 9-11 May! https://www.srtalliance.org/srt-plugfest-guide-what-you-need-to-know/ https://www.haivision.com/resources/webinars/srt-plugfest (i.e. right
now)
What is WHIP?
WebRTC HTTP Ingest Protocol
https://foo.bar/whip/endpoint
WebRTC Signalling Protocol
Designed to simplify WebRTC Ingress
It is an IETF Draft
Is TCP Not UDP
Has a partner protocol called WHEP WebRTC HTTP Egress Protocol
It is Starting to Gain Traction With Implementers & Providers
Twitch Dolby OBS GStreamer
Ultimately is just SDP over HTTP
No Media what-so-ever
That's WebRTCs Job
So What is WebRTC?
A Collection of Protocols
Can transport Data & Media
Offering the lowest latency But it's not easily con fi
gurable (called playout delay)
The Goal is always Real Time
Media travels as encrypted RTP
It is a Peer to Peer protocol But a server
can be a peer!
Being P2P means handling NAT scenarios using ICE But that's
less important when one peer is a server
Session setup using SDP strings Yes... voodoo
Mandatory encryption
Multiple Codec Choices
Works on every device with a web browser
But can work elsewhere too! (Osprey Talon Encoders for example)
Designed to get Media from A to B with as
low latency as possible
So WHIP vs SRT
None
Technically...
It's not really a competition
The Real Competition is...
WebRTC vs SRT
WebRTC is coming from behind.
But WHIP enables open adoption
WebRTC has never had that.
And that is so exciting.
YouTube supports WebRTC ingress (From a browser with a webcam
- maybe WHIP soon?)
For me... there isn't a competition
There's just more choice.
The right tool for the right job.
Which tool is right is down to your circumstances.
Choose wisely.
Both have Pros and Cons.
Ultimately...
You can't be sad that you now have more options
when streaming
You can't be sad that you now have more options
for receiving a remote stream
What do they both have in common?
Changes QUIC may bring
Exciting times in media delivery
Much Love.
Not war.
Thanks!
CommCon - commcon.xyz Residential Conference 19-23 June (Conf days 20-22)
Open Media Conference Blackburn UK Two Tracks, 35+ sessions Fantastic Networking Opportunities Use Discount Code LVT for £300 o f
Thanks! We're hiring https://jobs.everycastlabs.uk @dan_jenkins @everycastlabs