1463422 - Should URL.createObjectURL(MediaSource) implement auto-revoke?

Status: NEW

(Core :: DOM: Core & HTML, enhancement, P3)

Description

[Andrea Marchesini [:baku]]

By spec, it should not. Other browsers do not implement this feature.

Spec issue: https://github.com/w3c/media-source/issues/156
And we have WPT: https://searchfox.org/mozilla-central/source/testing/web-platform/tests/media-source/URL-createObjectURL-revoke.html#41-56

Comment 1

[Karl Tomlinson (:karlt)]

Rather than copying another implementation's bugs, I think the best thing for
the future of the web would be to support srcObject and lobby for deprecation
of createObjectURL(MediaSource).

https://bugzilla.mozilla.org/show_bug.cgi?id=886194
https://bugs.chromium.org/p/chromium/issues/detail?id=506273
https://bugs.chromium.org/p/chromium/issues/detail?id=254744

Copying the leak may hinder progress towards srcObject, because it may lead to
https://github.com/w3c/media-source/issues/156 being resolved without any
change.

The fact the implementations differed was a factor in the decision to
deprecate createObjectURL(MediaStream).

https://github.com/w3c/mediacapture-main/issues/404#issuecomment-250484426

The reasons for not wanting a leaky createObjectURL(MediaSource) are the
same reasons as for not wanting a leaky createObjectURL(MediaStream).

https://github.com/w3c/mediacapture-main/issues/404#issuecomment-255182322
https://github.com/w3c/mediacapture-main/issues/404#issuecomment-255227837