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Re: [Gnash-dev] Video problem with youtube HD?

From: John Gilmore
Subject: Re: [Gnash-dev] Video problem with youtube HD?
Date: Fri, 12 Jun 2009 23:22:26 -0700

> > I'm running gnash 0.8.5 as shipped with Ubuntu Jaunty.  When I go here:
> > 
> >
> > 
> > gnash has no trouble displaying the video.  But if I click the "HD"
> > button, switching it to stream the same movie in higher definition,
> > then after some initial hesitation it gets going, I get full audio,
> > but no video.  Just a black window with the controls around it.
> > However, if I then examine the saved HD file on the hard drive, "file"
> > says it's "ISO Media, MPEG v4 system, version 2", and it plays fine
> > with "totem".  Totem's sidebar claims that the video is 1280 x 720,
> > H.264 / AVC at 30 frames per second.  Looks great!
> Could you check if the high-res video really needs clicking the
> "HD" button or is used anyway ? I'm not sure about this cause
> all these "HD-ready" videos do look high-res to me even before.

It really needs clicking the HD button.

The URL itself takes you to the FLV version.  If you click the HD
button in it (which eventually turns the HD button red) then it starts
streaming the MPEG version.

You can readily see the difference between the two, if you've turned
on "Save media streams to disk" under the Edit -> Preferences menu,
"Media" tab.  The FLV version is much smaller, and when you play it
in totem, it gives you a fairly small window.  When you play the MPEG
one, it gives you a much bigger window.

Gnash plays both of them in the exact same size window inside a web
page.  I think that's a different problem.  I just tried it on the
Linux pp.  When I press the HD button, it blows up the flash subwindow
of the web page (into which Flash renders the movie), so it's much
bigger (about 800 pixels wide on my 1024x576 netbook screen).

> I'm not sure about this too, for a quick test you may link that video
> from testsuite/square.flv and use
> testsuite/misc-ming.all/NetStream-SquareTest.swf to check if it works.

If you know how to do that, please do it.  I'm running a stock Ubuntu
install of gnash, with no test suite.

> My gut feeling is that the problem is in handling the mechanism by which
> the "HD" button switches to another movie.

There may be issues in how the "HD" button switches to another movie
-- it makes gnash stutter for a bit, and the flash canvas doesn't get
any larger -- but once there is an MPEG stream coming down the
Internet, gnash certainly knows how to write it on disk.  So
presumably that stream which it is writing on disk is also being fed
to the "play a video" part of Gnash -- but nothing is visible.


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