As of Oct 4th I intend to land and ship the audioBitsPerSecond and videoBitsPerSecond attributes of MediaRecorder on all platforms. We've shipped MediaRecorder since Firefox 29.
*Summary*: The audioBitsPerSecond and videoBitsPerSecond attributes of MediaRecorder reflect what an application has configured the MediaRecorder to use (and which we already ship support for doing). In case it was configured with a total (audio+video) bitrate, or if it was not configured at all, these attributes reflect what the UA has chosen to configure the MediaRecorder with. After starting a recording, these are again updated to reflect the current configuration of the MediaRecorder, since tracks are now known and the UA may have recalculated the chosen bitrates based on the number and kind of tracks that are being recorded. At the same time I'm making our MediaRecorder implementation largely spec-compliant. There's work in bug 1514158 as well as bug 1512175, where the former is focusing on these attributes and the latter focuses on mime type handling. We landed spec clarifications for both of these recently. *Bug*: https://bugzilla.mozilla.org/show_bug.cgi?id=1514158 *Standard*: https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-videobitspersecond Clarifications were made to the spec to make this more interoperable. These were approved by Google. https://github.com/w3c/mediacapture-record/pull/175 *Platform coverage*: All *Preference*: There is no special pref for these attributes *DevTools bug*: There is no generic devtools support for MediaRecorder *Other browsers*: Chrome shipped (since 49, bug: https://bugs.chromium.org/p/chromium/issues/detail?id=262211), Safari shipped MediaRecorder but no attributes yet (behind an experimental feature flag since TP73, bug: https://bugs.webkit.org/show_bug.cgi?id=85851) *web-platform-tests*: I'm adding one as part of bug 1514158: https://phabricator.services.mozilla.com/D41584 *Secure contexts*: No, MediaRecorder is historically not restricted to secure contexts. However some APIs for getting access to the MediaStreamTracks needed to create a recorder are. Andreas Pehrson _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
