[Webkit-unassigned] [Bug 135972] [GStreamer] unrelated codecs required to play videos

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=135972

--- Comment #6 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
Relevant part of the spec:
http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#mime-types

So considering this, I think the best we could do here would be if we could directly override media.canPlayType() with our own implementation instead of just passing a list of mimetypes we might support to the upper layers.

Inside the media.canPlayType() implementation we could then check directly against the available GStreamer plugins and handle missing mime type details accordingly.

For example for
- video/mp4 we could check if: a) a MP4 demuxer is available, b) at least one video or audio decoder for H264, MPEG-4 Part 2, MP3 or AAC is available. Here we would return "maybe"
- video/mp4,codec=mp4v.20.8" check if: a) a MP4 demuxer is available, b) a MPEG-4 Part 2 video decoder is available. Here we can probably return "probably" instead of "maybe" then


Opinions?

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