849393 - [Nightly] Implement mediaElement.mozPreservesPitch toggle context item for mediaElement.playbackRate

Status: RESOLVED WONTFIX

(Toolkit :: Video/Audio Controls, enhancement)

Description

[Landpaddle]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.33 (KHTML, like Gecko) Chrome/27.0.1434.0 Safari/537.33

Steps to reproduce:

I right-clicked on an HTML5 video and navigated over the Play Speed context menu, then changed the speed of playback between all four current values.


Actual results:

A previous bug implemented time stretching as a pitch correction measure.  Thus, the video plays back in the same pitch at every speed, but the user is given no way of disabling pitch correction if they so choose.


Expected results:

To give the user more customization, a top-most or bottom-most toggle bar should be created under the Play Speed menu.  This way, the user can alternate between both pitch corrected and non-corrected playback with minimal effort.

Comment 1

[Paul Adenot (:padenot)]

See the answer from the HTML spec editor [1] and another comment [2] from a Microsoft person. In light of this, I don't believe this will make it into the HTML spec. Maybe if you have a good use case, we can revisit this decision.

[1]: https://www.w3.org/Bugs/Public/show_bug.cgi?id=15318#c1
[2]: https://www.w3.org/Bugs/Public/show_bug.cgi?id=15318#c5

Comment 2

[Jared Wein [:jaws] (please needinfo? me)]

I don't think this is something that we want to provide in our context menu. We need to find a good default for our users and preserving the pitch correction is the default that we arrived at (and a good one at that :) ).

I don't see a pref to toggle this for all videos, but somebody could write an addon that changes the default or adds another context menu item.