Hi, The API owners (Dan, Alex, Vlad, Yoav, Mike, Chris, Daniel, me) discussed this today. We'd like to understand a bit better where HEVC is already supported and what contexts don't yet support it.
As mentioned, HEVC (encode and decode) is already supported in WebCodecs. The tests on wpt.fyi are failing <https://wpt.fyi/results/webcodecs?label=master&label=experimental&aligned&q=h265>, but presumably that's because the VMs the tests run in don't have the required hardware support. I tried a few of the tests and they pass on my own Mac machine. Is decoding HEVC in a plain <video> supported? I tried `document.createElement('video').canPlayType('video/mp4; codecs=hvc1')` which returns "probably" in Safari, but the empty string in Chrome. I can't tell from https://caniuse.com/hevc if I should expect it to be supported or not. And how about in MSE? Are there contexts where HEVC is not yet supported that aren't covered by this intent? WebRTC comes to mind, but are there any other? Note that HEVC is called out as an example in the Blink principles of web compatibility <https://docs.google.com/document/d/1RC-pBBvsazYfCNNUSkPqAVpSpNJ96U8trhNkfV0v9fk/edit?tab=t.0#heading=h.prafhtr7ekmt>. Wherever royalty-free codecs like AV1 can be used, that's definitely preferable for the Chromium project and the web. Do we already support AV1 in every context where HEVC is supported or is planned? Best regards, Philip On Wed, Feb 12, 2025 at 4:33 PM 'Markus Handell' via blink-dev < blink-dev@chromium.org> wrote: > > Could you please request the various security, privacy, enterprise, etc. > bits in your chromestatus entry? > > Done! > > On Tue, Feb 11, 2025 at 7:40 PM Dale Curtis <dalecur...@chromium.org> > wrote: > >> Sorry about that. Historically video codec changes were handled via >> internal processes since they were aspects of the underlying Chromium >> platform. Especially so in the case of HEVC where it requires hardware >> support. Going forward all video codec changes will use the Blink process. >> >> - dale >> >> On Tue, Feb 11, 2025 at 9:12 AM Ashley Gullen <ash...@scirra.com> wrote: >> >>> As a web developer interested in Chrome's video encoding capabilities >>> with both WebCodecs and MediaRecorder, I had no idea until reading this >>> that Chrome actually already shipped support for HEVC encoding with >>> WebCodecs in M130 - it doesn't appear to be listed on chromestatus.com. >>> Could Google make sure significant updates like this are noted there? >>> Otherwise important updates can pass us right by! >>> >>> On Tue, 11 Feb 2025 at 16:09, Mike Taylor <miketa...@chromium.org> >>> wrote: >>> >>>> Could you please request the various security, privacy, enterprise, >>>> etc. bits in your chromestatus entry? >>>> On 2/11/25 3:56 AM, 'Markus Handell' via blink-dev wrote: >>>> >>>> CC Dale Curtis as well. >>>> >>>> On Tuesday, February 11, 2025 at 9:56:11 AM UTC+1 Markus Handell wrote: >>>> >>>>> Contact emails: >>>>> >>>>> zhu...@bytedance.com >>>>> >>>>> hand...@google.com >>>>> >>>>> Explainer: >>>>> >>>>> Explainer: Codec support updates for MediaRecorder >>>>> <https://docs.google.com/document/d/1YijhqWaeI118xqZV6Fd-UtqWpGDc-vFfFS6Dg4JEEqc/edit?tab=t.0> >>>>> >>>>> crbug.com/40276507 >>>>> >>>>> TAG review: >>>>> >>>>> N/A, small incremental change >>>>> >>>>> Summary: >>>>> >>>>> Support for HEVC platform encoding was added in WebCodecs in Chromium >>>>> M130. As a follow-up, support has been added to the MediaRecorder API in >>>>> Chromium. The API now supports both MP4 and Matroska muxer types with >>>>> different HEVC and H.264 mime type specifications. HEVC encoding is only >>>>> supported if the user's device and operating system provide the necessary >>>>> capabilities. >>>>> >>>>> Link to “Intent to Prototype” >>>>> >>>>> N/A, small incremental change and going directly for shipping. >>>>> >>>>> Risks >>>>> >>>>> Interoperability and Compatibility >>>>> >>>>> Gecko: Firefox 136 recently added support for decoding HEVC videos, >>>>> see https://bugzilla.mozilla.org/show_bug.cgi?id=1924066. Standards >>>>> position request link: >>>>> https://github.com/mozilla/standards-positions/issues/1174 >>>>> >>>>> WebKit: No official signal but note that MacBooks/iPhones have >95% HW >>>>> encode/decode support of H265 and that Safari has added support for this >>>>> codec in adjacent web APIs such as WebRTC. Standards position request >>>>> link: >>>>> https://github.com/WebKit/standards-positions/issues/460 >>>>> >>>>> Web developers: Positive. Support implemented by ByteDance & Intel. >>>>> >>>>> Will this feature be supported on all six Blink platforms (Windows, >>>>> Mac, Linux, Chrome OS, Android, and Android WebView)? >>>>> >>>>> The support is currently limited to Windows, macOS and Android hosts. >>>>> ChromeOS and Linux support may follow in the future when/if their platform >>>>> codec availability allows. >>>>> >>>>> Is this feature fully tested by web-platform-tests? >>>>> >>>>> Yes, the existing test suite >>>>> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/external/wpt/mediacapture-record/> >>>>> was extended with cases for the new codec strings. >>>>> >>>>> Tracking bug >>>>> >>>>> crbug.com/40276507 >>>>> >>>>> Link to entry on the Chrome Platform Status >>>>> >>>>> https://chromestatus.com/feature/6375884229181440 >>>>> >>>>> -- >>>> 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 visit >>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/edc31811-00da-4410-bfc7-b224bb825e4fn%40chromium.org >>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/edc31811-00da-4410-bfc7-b224bb825e4fn%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 visit >>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/cb683232-ef5e-47f4-93fa-3e8809a0d2b5%40chromium.org >>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/cb683232-ef5e-47f4-93fa-3e8809a0d2b5%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 visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAJjiFfG4zq4_mUknwsG%2BLetoM_RE1fiqFKVjkAyLJ4GpSUUkCw%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAJjiFfG4zq4_mUknwsG%2BLetoM_RE1fiqFKVjkAyLJ4GpSUUkCw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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