https://chromestatus.com/feature/5087376775053312
On Wednesday, October 11, 2023 at 4:09:32 PM UTC+2 Mike Taylor wrote: > Also, could you please create a chromestatus entry and request the various > review gate bits? > On 10/11/23 10:08 AM, Mike Taylor wrote: > > LGTM2 > On 10/11/23 8:49 AM, Philip Jägenstedt wrote: > > LGTM1, this is a minor addition to an existing API, was discussed in the > WG at TPAC, and has a positive standards position from Mozilla. > > On Mon, Oct 9, 2023 at 4:16 PM Henrik Boström <hb...@chromium.org> wrote: > >> *Contant emails:* >> hb...@chromium.org, h...@chromium.org >> >> *Explainer:* >> This is a small addition to the MediaStreamTrack >> <https://rawgit.com/w3c/mediacapture-main/master/getusermedia.html#dom-mediastreamtrack>. >> >> The new `track.stats` attribute getter allows a JS app to obtain statistics >> of a track, which in the case of video refers to frame counters. For >> example, if you use getUserMedia() to open a camera at a specific frame >> rate setting, this API lets you know how many frames the camera is actually >> producing (e.g. frame rate may be lower in low light conditions or higher >> than the app wants due to HW capabilities) and how many frames, if any, are >> discarded or dropped by the user agent, which is useful for investigations >> and experiments (some concrete examples mentioned here >> <https://github.com/mozilla/standards-positions/issues/895>). >> >> *Spec:* >> https://w3c.github.io/mediacapture-extensions/#mediastreamtrack-statistics >> This is an extension spec, owned by the same working group who owns the >> main spec. >> >> The spec and implementation currently only covers video frames, but >> similar audio frame counters are being considered for the future as well. >> >> *Summary:* >> Add frame counters to MediaStreamTrack. >> >> *Is this feature supported on all six Blink platforms?* >> Yes. >> >> *Measurements* >> Will add [Measure]. >> >> *Risks* >> Compatibility: MediaStreamTrack is supported on all browsers and the new >> stats API is a read-only statistics API rather than core functionality, so >> interop risks should be relatively limited. >> >> Signals from other implementers: >> - Firefox: positive (request for position >> <https://github.com/mozilla/standards-positions/issues/895>) >> - Safari: no signal at the time of writing (request for position >> <https://github.com/WebKit/standards-positions/issues/260>) >> >> Ergonomics: Used together with MediaStreamTrack and WebRTC >> (RTCPeerConnection) >> >> Activation: N/A >> >> *Web Platform Tests* >> >> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/external/wpt/mediacapture-extensions/MediaStreamTrack-video-stats.https.html >> >> -- >> You received this message because you are subscribed to the Google Groups >> "blink-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to blink-dev+...@chromium.org. >> To view this discussion on the web visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/029c4aea-9a60-4e9e-bc9c-773cac617454n%40chromium.org >> >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/029c4aea-9a60-4e9e-bc9c-773cac617454n%40chromium.org?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to blink-dev+...@chromium.org. > To view this discussion on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAARdPYcfV8inYFU5ChgPrTVRUX7%3D%2BFTTjL4D%3DLaYYYdQX1Wsbw%40mail.gmail.com > > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAARdPYcfV8inYFU5ChgPrTVRUX7%3D%2BFTTjL4D%3DLaYYYdQX1Wsbw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/d9a15321-d5d8-49ce-86da-b22a490486den%40chromium.org.
