[mythtv-users] mythnetvision and youtube == high CPU even with flash "square"

Brian J. Murrell brian at interlinx.bc.ca
Sat Jan 8 17:42:26 UTC 2011


On Sat, 2011-01-08 at 09:07 -0800, Robert McNamara wrote: 
> 
> Myth doesn't implement a standalone browser.  We simply wrap Qt's
> webkit.

Right.

> Qt's webkit is unable to use Flash hardware acceleration
> currently.

Ahhh.  Was not aware of this.  Is there an open issue anywhere that you
know of tracking this?

> Nothing in the myth code allows us to work around this.

Understood.

> when Qt fixes their issue, Myth will automatically start working with
> hardware acceleration.

Indeed.

> Bear in mind that decode of flash content is trivial-- it's the
> scaling and colorspace conversion that is horribly broken and
> CPU-violating... and their VDPAU implementation does nothing to
> correct this.

Is that just a linux implementation thing given that:
http://www.techspot.com/news/41625-adobe-flash-player-102-to-be-10-times-more-efficient.html says:

        It leverages complete hardware acceleration: not only does the
        GPU offload H.264 hardware decoding (introduced in Flash Player
        10.1), but it also handles the rest of the video rendering
        pipeline, including color conversion, scaling, and blitting.

That link of course doesn't mention Linux.

> As much as I am loathe to respond to things that start with "It's
> really quite annoying,"

Yes, you are quite right.  Apologies for my bad phrasing.

> Mythnetvision has been improved in trunk to
> permit both remote control and borderless playback *in some
> instances*.

Good news.

> Not all, or even most of the grabbers have been converted
> to this.  Youtube, Vimdeo, Blip.tv and Dailymotion currently work in
> this fashion.

Nice.

> Some will be impossible to convert to this method of
> control, such as hulu.

Which, as a Canadian, I don't really care about anyway.  :-)

> Have you read the documentation?
> 
> http://www.mythtv.org/wiki/MythNetvision#Help.21__I_can.27t_escape_out_of_a_video.21
> http://www.mythtv.org/wiki/MythNetvision#Help.21__I_clicked_the_player_controls_on_a_flash_player_and_now_I_.2Areally.2A_can.27t_escape_out_of_the_video.21

But of course!  :-)  Those were of no help.  I tried what was suggested
(moving the mouse out of the flash window) but when I did still nothing
I tried was able to get me out of the video and back to the previous
screen.  What keyboard input should I be trying while the mouse is
focused outside of the flash window and on the Myth border around it?

FWIW, I tried ESC, M, and several others.

b.

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