Issues

• Spec accepts audio mime types for video and vice versa, WPT tests for the opposite

  w3c/media-capabilities#261 · Filter by author Psychpsyo opened on Jul 15, 2026
  1

• Add support for querying concurrent/multiple playback capabilities

  enhancement
  w3c/media-capabilities#258 · Filter by author xhwang-chromium opened on Apr 25, 2026 · V2
  1

• Clarify how colorGamut/transferFunction validation maps to codec color metadata

  question
  w3c/media-capabilities#256 · Filter by author ashleyz opened on Mar 16, 2026
  1

  

• stereoscopic video support

  w3c/media-capabilities#249 · Filter by author MetaHubbe opened on Oct 22, 2025
  10

• How to define mapping between HDR capabilities and codec strings

  hdr
  w3c/media-capabilities#245 · Filter by author markafoltz opened on Jun 20, 2025
  1

• Add registry for HDR metadata types?

  hdrquestion
  w3c/media-capabilities#242 · Filter by author chrisn opened on Apr 30, 2025
  3

• Add SL-HDR detection support

  feature requesthdr
  w3c/media-capabilities#241 · Filter by author dbPhilips opened on Apr 29, 2025

• Do WebRTC encoding/decoding types have the single-codec restrictions?

  questionTPAC2026
  w3c/media-capabilities#238 · Filter by author markafoltz opened on Dec 17, 2024 · V1
  7

• Why does it matter if a single media codec is listed?

  question
  w3c/media-capabilities#235 · Filter by author chrisn opened on Oct 8, 2024

• Enum values that ignore naming conventions in Media Capabilities

  w3c/media-capabilities#227 · Filter by author dontcallmedom-bot opened on Aug 30, 2024
  2

  

• Horizontal reviews

  w3c/media-capabilities#226 · Filter by author chrisn opened on Aug 27, 2024 · V1
  4

  

• PING: Align exposing scalabilityMode with the WebRTC "hardware capabilities" check

  privacy-needs-resolutionwebrtc
  w3c/media-capabilities#209 · Filter by author aboba opened on Nov 15, 2023 · V1
  2

• Audio Hardware and Configuration Data

  audiofeature request
  w3c/media-capabilities#206 · Filter by author AdamSobieski opened on Aug 18, 2023 · V2
  1

• Browser interop issues

  implementation-needed
  w3c/media-capabilities#203 · Filter by author aboba opened on Mar 13, 2023 · V1
  3

• What is the interaction of media capabilities with WebCodecs

  w3c/media-capabilities#202 · Filter by author youennf opened on Dec 9, 2022 · V1
  16

  

• Proposal: canPlay(a local file) api

  feature request
  w3c/media-capabilities#196 · Filter by author hanguokai opened on May 27, 2022 · V2

• Retrieving RTCRtpCodecCapability from MediaCapabilities when queried for webrtc

  TPAC2026webrtc
  w3c/media-capabilities#185 · Filter by author youennf opened on Nov 18, 2021 · V1
  32

• Accessibility Review and a Question

  a11y-needs-resolution
  w3c/media-capabilities#177 · Filter by author johnfoliot opened on Apr 20, 2021 · V1
  2

• Trimming down the AudioConfiguration

  audiofeature request
  w3c/media-capabilities#160 · Filter by author chcunningham opened on Nov 25, 2020 · V2
  13

• text tracks not supported

  feature request
  w3c/media-capabilities#157 · Filter by author mikedo opened on Jul 13, 2020 · V2
  16

• Add consideration for MediaDecodingConfiguration to 2.3.3. Check Encrypted Decoding Support algorithm

  decodingencrypted
  w3c/media-capabilities#153 · Filter by author vi-dot-cpp opened on Jun 23, 2020 · V1
  3

• DolbyVision HDR Metadata

  feature requesthdr
  w3c/media-capabilities#136 · Filter by author chcunningham opened on Oct 18, 2019 · V1
  17

• multiple stream decoding

  feature request
  w3c/media-capabilities#113 · Filter by author jpiesing opened on May 2, 2019 · V2
  4

• Discuss transition() ergonomics

  ergonomicsfeature request
  w3c/media-capabilities#102 · Filter by author chcunningham opened on Oct 11, 2018 · V2
  25

• MCAPI Support for MPEG CMAF Supplemental Data

  cmaffeature request
  w3c/media-capabilities#99 · Filter by author johnsim opened on Sep 11, 2018 · V1
  1