Media Working Group - Past Calendar

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/media-source#363 Text Track Cue handling in MSE: Accidental trimming of overlapping text cues - Alicia Boya García
  • See Alicia's presentation from W3C Breakouts Day 2025

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda or contact the chairs.

Rechartering

• AC review of the new draft charter is open until 4 July.

Picture in Picture API

• w3c/picture-in-picture#239 PictureInPictureWindow should expose a "visible" property
• w3c/picture-in-picture#219 Candidate Recommendation tracking issue

WebCodecs

• w3c/webcodecs#886 Add backgroundSegmentationMask to VideoFrameMetadata registry
• w3c/webcodecs#783 Define scope for Candidate Recommendation
  • Issues labelled CR Blocking

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/mediasession#358 Distinguishing manually triggered vs automatically triggered enterpictureinpicture
• w3c/audio-session#6 Should AudioSession be able to specify the output speaker and/or route options (a la sinkId)?
• w3c/media-capabilities#231 Handle video profiles mismatched with colorGamut and transferFunction.

If time allows:

• AudioSession issue review
• MediaSession issue review

Other agenda items TBC.

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/mediasession#358 Distinguishing manually triggered vs automatically triggered enterpictureinpicture - @steimelchrome
• w3c/media-source#358 Support timed text in MSE - Alicia Boya García
  • See Alicia's presentation from W3C Breakouts Day 2025
• Other agenda items TBC

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

• Rechartering
  • The Media WG charter expires on 31 May 2025. Are there any additions or changes we want to make to our scope?
• WebCodecs
  • w3c/web-codecs#351 Orientation metadata for VideoFrame
    
• WebCodecs and MSE
  • whatwg/webidl#1465 Upgrade QuotaExceededError to a DOMException derived interface
• Media Capabilities
  • web-platform-tests/wpt#51029 Add test cases to the 'webrtc' type for decoding and encoding
• Next Meeting

If you would like to add an item to the agenda, please open a pull request against this agenda.

Please note that due to daylight savings change in the US, this meeting one hour earlier than normal in Europe and Japan.

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• Audio Session
  • w3c/audio-session#6 Should AudioSession be able to specifiy the output speaker and/or route options (a la sinkId)?
  • w3c/mediacapture-output#141 Set Default Audio Output Device API (SetPreferredSinkId, previously SetDefaultSinkId)
  • Is this ready to request Accessibility review?

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

• Welcome
• Bernard Aboba
• Rechartering
  • The Media WG charter expires on 31 May 2025. Are there any additions or changes we want to make to our scope?
• WebCodecs
  • w3c/webcodecs#879 Clarify that all VideoFrameMetadata members are optional
  • w3c/webcodecs#849 Guidance for user-defined VideoFrameMetadata entries
• Media Capabilities next steps after merging w3c/media-capabilities#222 Fixup MIME usage
  • V1 open PRs
  • w3c/media-capabilities#235 Why does it matter if a single media codec is listed?
  • w3c/media-capabilities#238 Do WebRTC encoding/decoding types have the single-codec restrictions?
• Audio Session
  • [https://github.com/w3c/mediacapture-output/issues/141] Set Default Audio Output Device API (SetPreferredSinkId, previously SetDefaultSinkId)
  • Is this ready to request Accessibility review?
• media-playback-while-not-visible permission policy
  • Progress and status
    • media-playback-while-not-visible (Chrome Status)
    • AudioContext "interrupted" state (Chrome Status)
  • Any WG feedback?
• Media Source Extensions (in brief)
  • w3c/media-source#359 Dynamic addition/removal of SourceBuffers
  • w3c/media-source#360 Multiple attachable/detachable SourceBuffers
  • Any WG feedback or clarifying questions?
    If you would like to add an item to the agenda, please open a pull request against this agenda.

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

• w3c/media-session#350 Introduce a generic skip action as a replacement to skipad
• Tracks on SourceBuffer with MSE in a worker
• w3c/media-capabilities#222 - Should be ready for review

If you would like to add an item to the agenda, please open a pull request against this agenda.

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/webcodecs#245 Need EncodedChunk to have video metadata to support WebRTC - alvestrand

• w3c/webcodecs#558 Opus Packet Loss Concealment - rvadhavk

• w3c/webcodecs#601 Expose in VideoFrameMetadata some fields from VideoFrameCallbackMetadata - youennf

• w3c/webcodecs#813 Add captureTime, receiveTime and rtpMetadata to VideoFrameMetadata - guidou

See issue #601

• w3c/webcodecs#849 Guidance for user-defined VideoFrameMetadata entries - chrisn

• w3c/webcodecs#855 Should there be an AudioDataMetadata? - guidou

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/webcodecs#839 Camera Effect Status: API - @brychanrobot, @markafoltz

The proposal enables websites to detect which OS-level effects have been applied to a given video frame by reading the appropriate field on VideoFrameMetadata. It could have a number of applications, but we expect that it would primarily be used help prevent conflicts between operating system and web application camera effects.

• w3c/media-capabilities#222 Fixup MIME usage - @chrisn, @marcoscaceres

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• Media Capabilities v1 scoping and prioritisation

  • Detail to follow

• w3c/encrypted-media#563 MPEG-CENC version support

  • Outcomes from October 3 MPEG meeting regarding CENC versioning?

• Additional agenda items welcome, TBC

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/mediasession#333 Add voiceactivity action - jianjunz

• w3c/media-capabilities#221 Add definition of power efficient, remove battery note - marcoscaceres

• w3c/media-capabilities#69 Interoperablity of MIME type handling - marcoscaceres / chrisn

• w3c/media-wg#47 TPAC 2024 Preparation - chrisn

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/encrypted-media#521 Clarity regarding Robustness string

• w3c/encrypted-media#545 Notes contain normative requirements

• w3c/webcodecs#800 Add Background Segmentation metadata entry to WebCodecs VideoFrame Metadata Registry

• TPAC 2024 Meeting Schedule

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/media-wg#47 TPAC 2024 Preparation - @chrisn, @marcoscaceres

• w3c/encrypted-media#501 EME v2 FPWD tracking issue - @chrisn

• w3c/webcodecs#601 Expose in VideoFrameMetadata some fields from VideoFrameCallbackMetadata - @youennf

• w3c/webcodecs#784 Candidate Recommendation tracking issue - @chrisn

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/webcodecs#601 Expose in VideoFrameMetadata some fields from VideoFrameCallbackMetadata - @Djuffin

• whatwg/html#10208 Proposal: Pause iframe media when not rendered - @gabrielsanbrito

• EME layering whatwg/html#6242, w3c/encrypted-media#511, w3c/media-capabilities#105 - @chrisn

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• Spatial media - @jernoble
• Moving MSE and EME registries to the W3C Registry Track - @chrisn
• EME: Spec updates to reference the HDCP version registry

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• Media Session

  • w3c/mediasession#312 Make setMicrophoneActive and setCameraActive return promises
  • w3c/mediasession#317 Support multiple devices to support Video Conferencing use cases
  • w3c/mediasession#318 Should toggle capture actions should expose the new capture state?

• Media Source Extensions

  • New editors needed for MSE Byte Stream Format Registry and WebM Byte Stream Format
  • w3c/media-source#320 Managed Media Source Status of WPT tests?

• Media Capabilities

  • Editors needed
  • w3c/media-capabilities#176 General approach to capability negotiation
    • w3c/media-capabilities#217 Add comments to privacy section
    • w3c/media-capabilities#212 RTC capabillity negotiation
  • w3c/media-capabilities#213 Media Capabilities and HDR Dynamic Metadata

• Encrypted Media Extensions

  • w3c/encrypted-media#516 Add draft HDCP version registry
  • w3c/encrypted-media#522 Formal Analysis of EME

• W3C Breakouts Day (12 March)

  • Possible media related topics?

• Next meeting scheduling

  • Our scheduled meeting (12 March at 22:00 UTC) overlaps Breakouts Day

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/mediasession#307 What is the relationship between toggle microphone/camera actions and MediaStreamTrack mute/unmute events? - jan-ivar

• w3c/media-capabilities#202 What is the interaction of media capabilities with WebCodecs - youennf

• w3c/media-capabilities#73 Better define channels in AudioConfiguration - mounirlamouri

• w3c/media-capabilities#160 Trimming down the AudioConfiguration - chcunningham

• w3c/media-capabilities#43 Need a mechanism for considering device conditions that affect media capabilities - jdsmith3000

• w3c/media-capabilities#113 multiple stream decoding - jpiesing

• w3c/media-capabilities#99 MCAPI Support for MPEG CMAF Supplemental Data - johnsim

• w3c/media-capabilities#136 Dolby Vision HDR metadata - chcunningham

• w3c/media-capabilities#102 Discuss transition() ergonomics - chcunningham

• w3c/media-capabilities#157 text tracks not supported - mikedo

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/mediasession#273 Chapter information in MediaMetadata - @steimelchrome

• w3c/media-capabilities#209 PING: Align exposing scalabilityMode with the WebRTC "hardware capabilities" check - @aboba

• w3c/media-capabilities#203 Browser interop issues - @aboba

• Media Capabilities prioritisation - @chrisn

  • There's a number of open issues (some from 2021 and earler). How should we prioritise, compared to other specs in the WG? Example issue #102 on proposed transition API.

• w3c/media-source#320 Proposal: ManagedMediaSource API - @marcoscaceres

• w3c/webcodecs#558 Opus Packet Loss Concealment - @aboba

Media Working Group Teleconference - 2023-12-12

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/encrypted-media#515 Add a HDCP version registry? - @chrisn

• w3c/media-source#320 Proposal: ManagedMediaSource API - @jyavenard @marcoscaceres

• w3c/media-capabilities#208 Questions on Scalability Mode and Media Capabilities - @aboba

• w3c/webcodecs#558 Opus Packet Loss Concealment - @aboba

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/webcodecs#200 Alpha support - @djuffin

• w3c/webcodecs#383 Can we drop the secure context (https) requirement? - @djuffin

• w3c/webcodecs#558 Opus Packet Loss Concealment - @aboba

• w3c/media-source#320 Proposal: ManagedMediaSource API - @jyavenard

• w3c/mediasession#237 The freezing in the artwork getter is broken - @marcoscaceres

  • w3c/mediasession#243 Update type of MediaMetadata's artwork

Media Working Group Teleconference - 2023-10-10

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda, please open a pull request against this agenda.

• w3c/media-wg#40 TPAC agenda

• Media WG / WebRTC joint meeting agenda

• w3c/media-source#320 Managed MediaSource API proposal

  • quality / onqualitychanged attributes

Other topics TBC (suggestions welcome)

Media Working Group Teleconference - 2023-08-08

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• Welcome Marcos as new co-chair

• w3c/media-wg#40 TPAC agenda planning - chrisn

  • Media WG agenda
  • Web RTC / Media WG joint meeting agenda
  • Other media related groups

• w3c/media-source#320 Managed MediaSource API - marcoscaceres

• w3c/webcodecs#681 Should VideoEncoderConfig cloning remove parameters that are not useful for a given codec? - youennf

Media Working Group Teleconference - 2023-07-11

Logistics

Chairs: Chris Needham, Marcos Caceres

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

Please note the change in meeting time, this is to allow @jyavenard to join to discuss any Managed Media Source questions

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/webcodecs#478 Coding Tool configuration (Content hints in VideoEncoderConfig) - @aboba

• w3c/media-source#320 Proposal: ManagedMediaSource API

Changes or additions to the agenda are welcome.

Media Working Group Teleconference - 2023-06-13

Logistics

Chairs: Jer Noble, Chris Needham

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/webcodecs#478 Coding Tool configuration (Content hints in VideoEncoderConfig) - @aboba

• w3c/webcodecs#104 Detach codec inputs (where feasible) - @Djuffin

• w3c/webcodecs#669 Custom error types - @Djuffin

• w3c/webcodecs#351 Orientation metadata for VideoFrame - @sandersdan

Media Working Group Teleconference - 2023-05-30

Logistics

Chairs: Jer Noble, Chris Needham

Zoom: https://lists.w3.org/Archives/Member/w3c-archive/2023May/0295.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda please contact the chairs or open a pull request against this agenda.

• w3c/media-session#294 / w3c/media-session#295 EnterPictureInPicture MediaSessionAction - @steimelchrome

• w3c/encrypted-media#251 Specify mixed encrypted/unencrypted content - @xhwang-chromium

• w3c/webcodecs#478 Coding Tool configuration (Content hints in VideoEncoderConfig) - @Djuffin

• w3c/webcodecs#92 API for conversion between pixel formats - @Djuffin

• w3c/webcodecs#669 Custom error types - @Djuffin

• w3c/webcodecs#351 Orientation metadata for VideoFrame - @sandersdan

• w3c/webcodecs#666 Support odd coded sizes and copy rects - @sandersdan

• w3c/media-wg#40 TPAC 2023 plans - @chrisn

Media Working Group Teleconference - 2023-05-16

Logistics

Chairs: Jer Noble, Chris Needham

Zoom link, see calendar entry

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda please open a pull request against this agenda.

• w3c/web-codecs#656 Allow decoder to ignore corrupted frames - @aboba, @dalecurtis

• w3c/webcodecs#619 Consistent SVC metadata between WebCodecs and Encoded Transform API and w3c/webcodecs#654 - @aboba

• w3c/media-wg#40 TPAC 2023 joint meetings - @chrisn

Media Working Group Teleconference - 2023-04-11

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

Please note: updated agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• MSE issue review and timescale estimates the Media WG charter for MSE v2

  Here are the notes from the MSE discussions at TPAC and our November meeting:

  • https://www.w3.org/2022/09/16-mediawg-minutes.html#t06
  • https://www.w3.org/2022/11/08-mediawg-minutes.html#t02

  Issues tagged TPAC-2022-discussion:

  • https://github.com/w3c/media-source/labels/TPAC-2022-discussion

  MSE v2 features and v2 bugfixes:

  • https://github.com/w3c/media-source/milestone/6
  • https://github.com/w3c/media-source/milestone/7

• Media Session API

  • https://github.com/w3c/mediasession/issues Working Group feedback on feature prioritisation - @youennf
    • w3c/media-session#194 Allow metadata and actions to be routed to different frames?
    • w3c/media-session#221 Integrate Media Session with Feature Policy
    • w3c/media-session#228 Add a way of detecting which actions a UA supports

Media Working Group Teleconference - 2023-03-14

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

Webcodecs:

• w3c/webcodecs#270 Where to put per-frame QP in VideoEncoderEncodeOptions. Two proposals:

  • w3c/webcodecs#633 Add codec specific quantizer fields to VideoEncoderEncodeOptions
  • w3c/webcodecs#642 Add a generic quantizer field to VideoEncoderEncodeOptions

Media Working Group Teleconference - 2023-03-07

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• Rechartering, see draft charter at https://w3c.github.io/charter-media-wg/

  • Rechartering timeline

  • w3c/media-wg#22 Review group milestones (timeline estimates for our specification deliverables)

  • Migrating Media Playback Quality to the HTML spec

  • w3c/encrypted-media#501 Steps to First Public Working Draft

  • Include DataCue API as a Potential Normative Spec? Also Sourcing In-Band Media Resource Tracks?

  • w3c/audio-focus#9 Should we change the Audio Focus repo or spec name?

  • Any other charter changes needed?

Media Working Group Teleconference - 2023-02-14

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

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Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• ITU-T SG16 Liaison statement on WebCodecs - @chrisn

• WebKit update on Audio focus/audio session API - @youennf

• w3c/webcodecs#619 Consistent SVC metadata between WebCodecs and Encoded Transform API (see slides) - @aboba

• Media pipeline architecture Media WG input and WebRTC collaboration planning - @chrisn

• Other items TBD

Media Working Group Teleconference - 2022-12-13

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

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Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

MSE Interoperability/implementation conformance issues:

• w3c/media-source#37 Normative feature detection for gapless audio support

• w3c/media-source#275, w3c/media-source#215 Relax timing constraint of initial HAVE_METADATA and later HAVE_CURRENT_DATA

• w3c/media-source#160 API for interoperable gap playback/tolerance

• w3c/media-source#267, w3c/media-source#205 Interoperable buffered.start(0) (and later) fudge room

• Reflections on MSE in Worker and WG review process, see w3ctag/design-principles#400

Media Working Group Teleconference - 2022-11-08

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Extended Timed Text Working Group meeting, incorporating a joint meeting with the Media Working Group

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/media-wg #35 TPAC agenda planning. Input requested from all editors on agenda priorities - @chrisn
  • Media WG meeting (Friday 16 September)
    • Review agenda items
  • WebRTC WG / Media WG joint meeting (Thursday 15 September)
    • Review agenda items
  • Timed Text WG / Media WG joint meeting (Friday 16 September)

Media Working Group Teleconference - 2022-08-16

Logistics

Chairs: Jer Noble, Chris Needham

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/encrypted-media #499 Revisit the requirement to continuously run the "Monitor for CDM State Changes" algorithm - @xhwang-chromium

• w3c/media-wg #35 TPAC agenda planning

  • Media WG meeting (Friday 16 September)
  • WebRTC WG / Media WG joint meeting (Thursday 15 September)
  • Timed Text WG / Media WG joint meeting (Friday 16 September)

Media Working Group Teleconference - 2022-08-09

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/media-wg#35 TPAC agenda brainstorming - @chrisn

• w3c/mediasession#274 Media Session and Capture Handle Actions

• w3c/webcodecs#416 WebCodecs H.263 registration next steps - @chrisn

• Other items TBD

Media Working Group Teleconference - 2022-07-12

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/media-source#306 MSE in Worker: Refine srcObject's MediaSourceHandle behavior

• Media Session spec editor changes

• Media Session issue triage

• Media Session and WebRTC Capture Handle Actions

  • w3c/mediasession#274 Should we add slide presentation specific actions?

• w3c/media-wg#35 TPAC 2022 planning:

  • Agenda and joint meetings

TODO: Add other agenda items

Media Working Group Teleconference - 2022-06-14

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

The purpose of this meeting is to continue discussion of Capture Handle Actions and Media Session and whether or not the two action interfaces can work together. For background, please refer to minutes from the previous meeting on this topic

• w3c/mediasession#274 Should we add slide presentation specific actions?

• w3c/mediasession#275 Should it be possible for web pages to trigger actions on another page?

• w3c/mediasession#276 Should we add a common repository for MediaSession actions and WebRTC capture handle actions?

• AOB

WebRTC Working Group / Media Working Group Joint Meeting - 2022-05-23

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/media-source#306 MSE in Worker: Refine srcObject's MediaSourceHandle behavior - wolenetz
• Specification horizontal review status
• Media Session editors needed
• Status of Media Capabilities WebRTC support (issues #185 and #192
• Planning
  • Upcoming joint meeting with WebRTC on Media Session and WebRTC Capture Handle Actions (23 May)
  • Timed Text WG issue #503 - Joint meeting with Timed Text WG and OpenUI CG
  • TPAC 2022

Media Working Group Teleconference - 2022-05-10

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• Capture Handle Actions and Media Session Actions and whether or not the two action interfaces can work together. Is there overlap, and if so, how to share potential work between the working groups?

• Future joint meetings

• AOB

WebRTC Working Group / Media Working Group Joint Meeting - 2022-04-25

Logistics

Chairs: Bernard Aboba, Jan-Ivar Bruaroey, Harald Alvestrand (WebRTC WG), Jer Noble, Chris Needham (Media WG)

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• https://github.com/w3c/media-capabilities/issues/192 Should width, height, etc be required or optional in VideoConfiguration?

• https://github.com/w3c/media-capabilities/issues/185 Retrieving RTCRtpCodecCapability from MediaCapabilities when queried for webrtc

• https://github.com/w3c/media-capabilities/pull/191 Add webrtc examples

• WebCodecs H.263 registration update

Media Working Group Teleconference - 2022-04-12

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• WebCodecs H.263 registration CfC is open - @chrisn
• autoplay/26 Autoplay Policy Detection CfC closes, publish FPWD - @chrisn
• autoplay/23 Preventing sites from prompting users on Autoplay - @sushraja-msft
• autoplay/24 Privacy, disclosing user settings is a fingerprinting vector - @sushraja-msft
• autoplay/25 The API restricts autoplay options to current status quo - @sushraja-msft
• TPAC update (possible hybrid meeting 12-16 September, Vancouver)
• Other agenda items, TBD

Media Working Group Teleconference - 2022-03-08

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• Agenda Items TBD

Media Working Group Teleconference - 2022-02-08

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

Part of this meeting will be a joint meeting with the Second Screen Working Group, which seeks input from experts on Media Capabilities. There are two issues to discuss, related to the Open Screen Protocol, which supports the Presentation API and Remote Playback API.

• w3c/openscreenprotocol#194 Remote Playback: Capabilities for HDR rendering and display

• w3c/openscreenprotocol#233 Use the same codec names as the media APIs

We should have time to cover other Media Working Group topics. If you would like to add an item to the agenda, please open a pull request against this agenda.

Media Working Group Teleconference - 2022-01-11

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/webcodecs#417 Add a WebCodecs registration for H.263

• w3c/autoplay#15 Alternate API design

Media Working Group Teleconference - 2021-12-14

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

In this Media & Entertainment IG meeting, Yuhao Fu at Bytedance will introduce two video related API proposals. Media WG members are invited to join, we value your feedback on these proposals:

• video.requestVideoLoadCallback() - a proposal to allow web developers to get response information such as video data, HTTP code, error details, and so on when using <video src="{file address}"> for media playback. See https://github.com/leonardoFu/video-rvlc/blob/main/explainer.md

• <video> SEI events - a proposal to expose h.264 SEI (Supplemental Enhancement Information) events to synchronize interactivity with live video. See https://github.com/leonardoFu/video-sei-event/blob/main/explainer.md

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda please open a pull request against this agenda.

• w3c/media-wg#34 Moving video.requestVideoFrameCallback spec to media WG? - tguilbert-google

Media Working Group Teleconference - 2021-11-09

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/mse-byte-stream-format-isobmff#4 Use of ftyp box - cconcolato

• w3c/mse-byte-stream-format-isobmff#5 Support for edit lists - cconcolato

• w3c/mse-byte-stream-format-isobmff#6 Support for unknown boxes - cconcolato

• w3c/mse-byte-stream-format-isobmff#7 Number and order of boxes - cconcolato

• TPAC planning: WebRTC WG / Media WG joint meeting

Media Working Group Teleconference - 2021-09-28

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

This time, we have a number of issues related to MSE, and in particular MSE in Workers:

• w3c/media-source#184 MSE for WebCodecs (comment). See explainer: https://github.com/wolenetz/mse-for-webcodecs/blob/main/explainer.md - wolenetz

  Explainer describes supporting buffering containerless WebCodecs encoded media chunks with MSE for low-latency buffering and seekable playback.

• w3c/media-source#280 MSE-in-Workers: {Audio,Video,Text}Track{,List} IDL in HTML need additional DedicatedWorker in Exposed - wolenetz

  The extended HTML AudioTrack, VideoTrack, TextTrack, and their *TrackList IDLs need updating to have exposure to both Window and DedicatedWorker, not just Window.

• w3c/media-source#277 MSE-in-Workers: Consider (eventually) transitioning attached element to error upon termination of MediaSource's worker/what should media element do? - wolenetz

  Should HTMLMediaElement do any error transition upon the termination of the DedicatedWorkerGlobalScope that owns the attached MediaSource?

• w3c/media-source#275 Consider relaxing timing of initial HAVE_METADATA transitioning - wolenetz

  There is inconsistent behaviour between implementations in the updateend event associated with an appendBuffer() whose parsing causes a HAVE_METADATA state transition.

• w3c/media-source#281 MSE-in-Workers: Track enable/selection change behavior needs clarity - wolenetz

  What to do with selected/enabled track state management if MSE is in a DedicatedWorker, while the HTMLMediaElement remains in Window?

• w3c/media-source#156 Restore auto-revoking behavior of createObjectURL(MediaSource) to revert breaking change introducing memory leaks - wolenetz

• w3c/media-source#28 Support attachment (and inspection) of MediaSource to HTMLMediaElement via HTMLMediaElement.srcObject - wolenetz

Media Working Group Teleconference - 2021-09-14

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on the IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/mediasession#228 Add a way of detecting which actions a UA supports - beaufortfrancois

• MSE First Public Working Draft status - wolenetz

Media Working Group Teleconference - 2021-08-10

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on the IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• w3c/webcodecs#213 Should ImageDecoder IsTypeSupported be (a)synchronous? - chcunningham

• w3c/webcodecs#239 Is exposing https://w3c.github.io/webcodecs/#enumdef-hardwareacceleration a good idea - youennf

Media Working Group Teleconference - 2021-07-27

Logistics

Chairs: Jer Noble, Chris Needham

Webex: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on the IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".

Agenda

This agenda can be viewed and updated on GitHub.

If you would like to add an item to the agenda or volunteer to scribe please open a pull request against this agenda.

• Rechartering and Open UI collaboration - tidoust

We have added Open UI Community Group to the Coordination list in the Charter

• CfC: Should WebCodecs be exposed in Window environments?

• w3c/mediasession#228 Add a way of detecting which actions a UA supports - beaufortfrancois

Media Working Group Teleconference - 2021-07-13

Logistics

Chairs: Jer Noble, Chris Needham

WebEx: https://lists.w3.org/Archives/Member/w3c-archive/2020Jan/0323.html

IRC: https://irc.w3.org/?channels=#mediawg

If you are unable to login to view the call details please ask on the IRC before the call.

For assistance go to https://mit.webex.com/mit/mc and on the left navigation bar, click "Support".