On Tue, Oct 24, 2023 at 4:49 AM Mike Taylor <miketa...@chromium.org> wrote:
> On 10/23/23 1:13 PM, Dale Curtis wrote: > > On Mon, Oct 23, 2023 at 10:02 AM Mike Taylor <miketa...@chromium.org> > wrote: > >> On 10/23/23 11:54 AM, Dale Curtis wrote: >> >> Hmm, not sure why the description got reflowed, here's the formatted >> version: >> >> Chrome will deprecate and remove support for the Theora video codec in >> desktop Chrome due to emerging security risks. Theora's low (and now often >> incorrect) usage no longer justifies support for most users. >> >> Notes: >> - Zero day attacks against media codecs have spiked. >> - Usage has fallen below measurable levels in UKM. >> - The sites we manually inspected before levels dropped off were >> incorrectly preferring Theora over more modern codecs like VP9. >> >> Meaning, once Theora support is gone, video playback continues to work >> for all sites you inspected because media source selection found something >> else playable? >> > > Correct, if Theora support was missing users would have a higher quality > experience due to a more modern codec being selected. > > >> - It's never been supported by Safari or Chrome on Android. >> - An ogv.js polyfill exists for the sites that still need Theora support. >> - We are not removing support for ogg containers. >> >> Our plan is to begin escalating experiments turning down Theora support >> in M120. During this time users can reactivate Theora support via >> chrome://flags/#theora-video-codec if needed. >> >> The tentative timeline for this is (assuming everything goes smoothly): >> - ~Oct 23, 2023: begin 50/50 canary dev experiments. >> - ~Nov 1-6, 2023: begin 50/50 beta experiments. >> - ~Dec 6, 2023: begin 1% stable experiments. >> >> Even though UKM appears to be exceedingly low, if you're not 100% >> confident this will be a no-op, you might consider beginning the stable >> experiment after the new year (and many production freezes). >> > > I did consider this and ran this plan by Finch team ahead of time, however > given the low usage, long dev/beta experiments, that these sites would > already be broken on Android/Safari, and that we'd still have time to turn > down the 1% stable experiment before Finch freeze, leaving at 1% until > after holiday freezes should be safe. > > OK, that sounds reasonable. Can you also request the rest of the review > bits in the chromestatus entry? > Done, thanks I thought that was automatic these days. -- 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/CAPUDrwfKYKWvrdHEoqhVXdfs1rbX%2BBxDgRya1HPCyeR4EX_aXg%40mail.gmail.com.
