Meeting minutes
<cpn>
https://
TPAC
Chris: TPAC is coming
up
… (shows the basic structure)
… the question is whether we'd like to meet or hold
joint meetings with other groups
… a few suggestions here
… 18-22 Oct: breakouts
… 25-29 Oct: Group meeting
… currently planned: WebRTC + Media, WebTransport,
WebRTC
… do we want to have a joint meeting with
WebTransport, etc.?
<tidoust> Possible topics for WebTransport
Jake: updates on Web Transport?
Francois: put info above
<cpn> https://
<jholland> webtransport
use cases: https://
Chris: Multicast CG may be considering joint discussion
Jake: ok, I added a
link to the use cases document above.
… Do you have other use cases in mind?
Francois: Basically, low-latency and live streaming.
Jake: Do agree but in terms of media...
Chris: Would we want to
use Web Transport for low-latency distribution, e.g.,
… live streaming at scale for a large number of
viewers?
Igarashi: CDN support
for low-latency streaming is an implementation issue
… not aware of other requirements myself
Chris: I don't want to
push multicast topic at the moment if it's not ready,
… but joint discussion on WG's progress, and IG use
cases and requirements, etc., would make sense.
Igarashi: Low-latency live streaming is a good use case for us.
Jake: I would ask if
there is any implementation, it interesting to know if anyone is
doing this?
… WebTransport with CMAF. WebTransport is already
out?
Chris: Not sure about the status, maybe in Chrome origin trial as experimental feature
<cpn> https://
Chris: The web.dev
article shows current status, it looks like there's an origin
trial.
… Happy to organize a joint meeting, need to decide
the agenda, though.
… Who would present on that? Then discuss IG use
cases.
… Possible someone who has implemented could talk
about it.
Jake: I think depends if there is anybody
Chris: Will Law is the co-Chair
Jake: I can ask him, or Ali
Chris: Great, thank you.
Igarashi: We also can ask the Web Transport WG if they think about CDN support.
Chris: yes
Jake: It's already listed as a use case, but good to hear from anybody who provides the service.
Igarashi: What about
limelight?
… They already provide CDN for low-latency
streaming on WebRTC.
… A similar approach would be applied.
Jake: yeah, don't know about the pros and cons, though
Chris: It sounds like there's enough interest to organize a joint meeting with the Web Transport WG
Jake: OK, I think it rests on finding an implementation.
Chris: In the early
discussions on WebTransport we heard about people doing media
delivery over WebRTC DataChannel,
… so WebTransport addresses a similar use
case.
… can we make a dedicated secure
protocol?
Igarashi: The other benefit of WebRTC is application's having low-latency control. WebRTC app can do flow control, reduce latency between clint and edge with WebTransport.
Chris: Another
potential TPAC topic is MiniApps for TV devices.
… Chris Lorenzo is interested in this,
… maybe concerns about existing Web technologies in
terms of efficiency of UIs for TV devices.
… He has been looking at MiniApps approach, so it
could be interesting to look into it,
… and gauge interest from other media
companies.
… It doesn't have to wait until TPAC, we could try
to have a joint meeting with the MiniApps group
earlier.
… It would be interesting to see if there is
general interest from members, but may want to hear an introduction
first.
… Finally new areas for MEIG? Are we looking at the
right things?
… And a related topic, how to increase
participation?
… We could organize a discussion about that.
Looking at new areas helps with post-TPAC planning.
Kaz: There could be
several levels for joint meetings: invite other groups to our
meetings, or MEIG members visiting other groups and reporting
back.
… Discussion for expected joint meetings so far,
inviting people into MEIG meeting. I'd like to suggest some MEIG
members visit the WoT meeting to discuss TV devices and media
streaming integration in the IoT context.
… I organised a W3C workshop on smart cities. I'm
generating a charter for a Smart Cities IG based on the
results
… May not be ready by TPAC, but could have a
breakout session. Thinking about media streaming or content in
general for smart cities could be another topic for
TPAC.
Chris: Yes, could be interesting though the detail is not clear yet.
Jake: Possible use case on video streaming, e.g. IoT devices (like video cams)?
Chris: There are IoT
aspects and smart cities aspects.
… Web of Things is about how to make IoT devices
work together interoperably?
… In a media context, this could be your media
devices within a smart home environment, synchronized playback
between different rooms, streaming media from one device to
another, etc.
Kaz: And data governance in general is important.
Rob: Something I've
been thinking about smart cities.
… Testbed 17 is looking at distilling moving object
data from video. Tracking school buses from a GoPro video on the
roadside or a drone that monitors from the sky.
… We're specifically trying to take a video frame,
identify the relevant objects and calculate location from that and
create as metadata.
… Implications for smart cities and autonomous
vehicles. Perspective imagery. Want to do something TPAC, nothing
to announce yet.
Chris: It's interesting to combine different aspects like thAndreas: video stream, location, IoT, smart city.
Rob: We're also looking at multiple cameras, e.g., traffic cameras, CCTV, can we identify the same vehicle at different times from different cameras?
Kaz: It's kind of scary :)
Rob: Yeah...
Chris: Also the image
processing and machine learning aspect.
… If you're organizing something, that would be
good,
… or if there is any possible discussion on smart
cities, we can join it to discuss these use cases,
… rather than organizing something
ourselves.
Kaz: Yes, that would be very welcome.
Jake: Is this about attaching metadata to video?
Rob: I'm working on WebVMT, OGC, overlaps with different tech areas. Testbed 17, OGC spec, periodic observations with location, e.g. temperature at a time at some location.
<RobSmith> OGC
Testbed-17 MF: https://
<RobSmith> OGC Moving
Features: https://
<RobSmith> OGC
SensorThings: https://
<RobSmith> WebVMT
Editors Draft: https://
<RobSmith> WebVMT
website: https://
<RobSmith> OGC
Testbed-16 Motion Video to Moving Features WebVMT results video:
https://
Chris: We've got a separate activity about timed metadata, Media Timed Events
Chris: We've had
discussion with TTWG on WebVTT and unbounded cues. I want to find a
time to meet next to discuss.
… I'll contact Rob, Gary, others to set a
time.
C2PA
Chris: This is about
content provenance. We had intro at last month's MEIG meeting.
We're ready to discuss browser requirements, so waiting on them to
discuss next steps.
… Project Origin (related BBC project) has a
newsletter you can sign for.
<cpn> https://
Multicast Receiver API
Jake: Main thing is
getting security model reviewed at IETF.
… There are some basics on multicast to cover
before it's ready for others to get into for media use
cases.
… The media use case is important and having a
decent demo would be good. We have traffic that can be used for
that.
… We have a prototype in a Chromium
fork.
… If anyone is interested in exploring multicast
uses for media or other things, in browsers, please join the
CG.
… For media, want to handle broadcast more
efficiently. Working with ISPs, want to get that nailed down. 2-3
year timeline. Hoping to have deployments in a few years. Can be
done in Internet2. Heavy networking component.
… Want to it to work on the web with the security
model. Focus on that to end of year. For media, keep an eye on it,
we'll check in once in a while. I put up a tutorial, can experiment
with it.
Chris: When we're ready
about the security model, we can invite the browser people, the CG
can host the conversation.
… Interesting prototype there, might be fun to
experiment with Multicast Receiver with WebCodecs to decode and
display the video.
Jake: I would love to see that.
Media Timed Events
Chris: At the last
DataCue meeting we talked about also working on text track support
in MSE.
… I'm, a bit nervous to expand the scope, it needs
contributors.
… It would be interesting to hear from media
players, see what demand there is.
… We can dig into this topic in the DataCue
meetings.
Media Integration Guidelines
Chris: This is intended
for developers, documenting interop issues across browsers and
devices.
… Good input from Google, Mozilla and Vewd so
far.
… Is anybody interested in editing the
document?
… Are there other companies to get input from,
e.g., Apple or potentially others such as TV vendors or
integrators.
… Feel free to contact the MEIG Chairs and/or John
Riviello.
Open issue review
Chris: We have a number
of open topics in GitHub issues.
… It would be good to decide whether we'd like to
keep them open or not.
… Noticing Andreas is on the call, we have a few
issues about captions in VR environments.
… Has there been any progress, so we can update the
issues?
Andreas: There is the
Immersive Captions CG working on issues about captioning,
accessibility experts are there.
… maybe we could the close issue on our
side.
Chris: we could invite the an update from the CG
<tidoust> Immersive Captions CG
Andreas: my impression is there is some discussions held in parallel there.
Chris: Yeah, the cross-group coordination is important.
<tidoust> (CG meets
regularly, see internal mailing-list archives:
https://
Chris: A meta question is how to handle the remaining issues. Some are tracking issues, some are one-off notifications.
<tidoust> [I started to add "needs input" and "needs editor" labels. Not sure whether that's the right approach :)]
Media WG updates
Chris: A few things: I recommend people look at the MSE in Workers draft (and prototype).
Next meeting
Chris: August 3, agenda
suggestions welcome.
… Anything else for today?
(none)
[adjourned]