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 <h...@chromium.org> wrote: > *Contant emails:* > h...@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+unsubscr...@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+unsubscr...@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.
