LGTM2 to change the behavior.

On Tue, May 13, 2025 at 12:11 PM Daniel Bratell <bratel...@gmail.com> wrote:

> LGTM1 to change the behaviour.
>
> /Daniel
> On 2025-05-13 20:30, Dale Curtis wrote:
>
> The plan is to land the change right away given the low usage and long
> shipped state on other UAs.
>
> - dale
>
> On Tue, May 13, 2025 at 10:57 AM Daniel Bratell <bratel...@gmail.com>
> wrote:
>
>> Do you just want to deprecate it (i.e. add some warning when used) or do
>> you want to do the change right away? Doing the change right away seems
>> reasonable.
>>
>> /Daniel
>> On 2025-05-13 18:44, Chromestatus wrote:
>>
>> Contact emails dalecur...@chromium.org
>>
>> Explainer None
>>
>> Specification https://w3c.github.io/media-source
>>
>> Summary
>>
>> The Media Source standard long ago changed to disallow ambiguously
>> defined behavior involving asynchronous range removals: *
>> SourceBuffer.abort() no longer aborts SourceBuffer.remove() operations *
>> Setting MediaSource.duration can no longer truncate currently buffered
>> media Exceptions will be thrown in both of these cases now. Safari and
>> Firefox have long shipped this behavior, Chromium is the last browser
>> remaining with the old behavior. Use counters show ~0.001%-0.005% of page
>> loads hit the deprecated behavior. Primarily small Russian sites. If a site
>> hits this issue, playback may now break. Usage of abort() cancelling
>> removals is increasing, so it's prudent to resolve this deprecation before
>> more incompatible usage appears.
>>
>>
>> Blink component Internals>Media>Source
>> <https://issues.chromium.org/issues?q=customfield1222907:%22Internals%3EMedia%3ESource%22>
>>
>> TAG review None
>>
>> TAG review status Not applicable
>>
>> Risks
>>
>>
>> Interoperability and Compatibility
>>
>> Safari and Firefox have long shipped this behavior, Chromium is the last
>> browser remaining with the old behavior. Use counters show ~0.001%-0.005%
>> of page loads hit the deprecated behavior. Primarily small Russian sites.
>> If a site hits this issue, playback may now break.
>>
>>
>> *Gecko*: Shipped/Shipping (
>> https://searchfox.org/mozilla-central/rev/e703d3fbd6da82cdda1256016a80abb1f245fedd/dom/media/mediasource/MediaSource.cpp#666)
>> Ships both abort() and setDuration() restrictions.
>>
>> *WebKit*: Shipped/Shipping (
>> https://github.com/WebKit/WebKit/blob/1afe2bf63106ce2c22fe78926d629780c2b6fd6a/Source/WebCore/Modules/mediasource/MediaSource.cpp#L732)
>> Ships both abort() and setDuration() restrictions.
>>
>> *Web developers*: No signals Bug has 25 +1s so developers are hitting
>> this discrepancy, but no direct feedback.
>>
>> *Other signals*:
>>
>> WebView application risks
>>
>> Does this intent deprecate or change behavior of existing APIs, such that
>> it has potentially high risk for Android WebView-based applications?
>>
>> Yes. WebView based players using Media Source Extensions will be affected.
>>
>>
>> Debuggability
>>
>> Clear exceptions are thrown when this issue occurs.
>>
>>
>> Will this feature be supported on all six Blink platforms (Windows, Mac,
>> Linux, ChromeOS, Android, and Android WebView)? Yes
>>
>> Is this feature fully tested by web-platform-tests
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ? Yes
>>
>> https://wpt.fyi/results/media-source/mediasource-duration.html
>> https://wpt.fyi/results/media-source/mediasource-remove.html
>>
>>
>> Flag name on about://flags MediaSourceNewAbortAndDuration
>>
>> Finch feature name MediaSourceNewAbortAndDuration
>>
>> Rollout plan Will ship enabled for all users
>>
>> Requires code in //chrome? False
>>
>> Tracking bug https://issues.chromium.org/issues/40474569
>>
>> Measurement
>> https://chromestatus.com/metrics/feature/timeline/popularity/1428
>> (0.004970% of page loads)
>> https://chromestatus.com/metrics/feature/timeline/popularity/1429
>> (0.001454% of page loads) Usage of abort() cancelling removals is
>> increasing, so it's prudent to resolve this deprecation before more
>> incompatible usage appears.
>>
>> Estimated milestones
>> Shipping on desktop 138
>> Shipping on Android 138
>> Shipping on WebView 138
>>
>> Anticipated spec changes
>>
>> Open questions about a feature may be a source of future web compat or
>> interop issues. Please list open issues (e.g. links to known github issues
>> in the project for the feature specification) whose resolution may
>> introduce web compat/interop risk (e.g., changing to naming or structure of
>> the API in a non-backward-compatible way).
>> None
>>
>> Link to entry on the Chrome Platform Status
>> https://chromestatus.com/feature/5190983595327488?gate=5206078123671552
>>
>> This intent message was generated by Chrome Platform Status
>> <https://chromestatus.com>.
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