Video Playback virtually impossible on Neo Freerunner? (Re: Video of Qt 4.4 on Neo1973: brings iPhone like graphics)

[wim.delvaux at adaptiveplanet.com]

What if you could use one of those 'coming very soon' Laser projection 
device(s) connected to USB ?




On Monday 28 April 2008 08:17:18 Flyin_bbb8 wrote:
> just thinking out loud here, for example maybe you have some short videos
> you want to show to some other people, so u can open an app that checks the
> amount of memory you have, then checks the amount it needs to do
> decoding..... if it has enough it does the decoding (not at full speed) 'n
> lets u know when it's complete, then u can watch it 'n decide if u wanna
> watch it again or delete the decoded part from memory again... not sure if
> this is possible, not an expert here...
>
> On Mon, Apr 28, 2008 at 4:47 AM, The Rasterman Carsten Haitzler <
>
> raster at openmoko.org> wrote:
> > On Mon, 28 Apr 2008 03:09:51 +0200 ramsesoriginal <
> > ramsesoriginal at gmail.com>
> >
> > babbled:
> > > I'm not an expert, so maybe this question is silly, but it just popped
> > > to my mind: using mencod, couldn't you decode the video, store it in
> > > decoded form and then you have onyl to copy it? If this would be
> > > possible, you cold make some sort of video-transfere-applciation where
> > > you can set the desidred speed/size/ratio..
> > >
> > > again, i have no idea if it's possible, just 2 thoughts from my side..
> >
> > yes. that's possible. of course your 100mb movie file becomes about 1-2gb
> > now :) maybe more...
> >
> > in theory u should manage 512x384 at 24fps (24fps is movie framerate in the
> > cinemas). as u have almost no decode (though you have to read it from
> > some IO
> > souce). so u need an IO source that can stream 7mb/sec to you (good luck
> > finding that!) but *IF* u did... a 2 hour movie would be about 46gb of
> > data...
> > good luck finding that storage too! :)
> >
> > in other words... "not practical to have it unencoded to avoid decoding".
> >
> > i used a 2hr movie just as an example so you know just how much video
> > compression gets you... it saves an AMAZING amount of space. the numbers
> > for
> > pure video source (that is zero quality loss original RGB data) is double
> > that
> > for 512x384 at 24fps. (92gb)...
> >
> > in the end beyond a "hey my phone is so cool i play high-res video" demos
> > of 30
> > second clips (that woul still be enormous and u wouldnt be able to store
> > more
> > than 1 or 2 anyway - but as a demo to show off its enough), it is just
> > not useful or practical.
> >
> > yes - we can go for simpler compression schmes that still require decode,
> > but
> > just less effort and eerything just adjusts. we spend less decode time,
> > but
> > require more IO bandwidth and vice-versa. once decoded u have a tradeoff
> > of
> > resolution vs frames per second as the pipe u have to send it down is
> > fixed in
> > size. you choose your favorite tradeoff, but somewhere there you will
> > need to
> > make one.
> >
> > --
> > Carsten Haitzler (The Rasterman) <raster at openmoko.org>
> >
> > _______________________________________________
> > Openmoko community mailing list
> > community at lists.openmoko.org
> > http://lists.openmoko.org/mailman/listinfo/community