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

Kristian 'kriss' Mueller kriss at
Mon Apr 28 00:17:06 CEST 2008

Hi Christoph

Am Donnerstag, den 24.04.2008, 11:19 +0200 schrieb Christoph Witzany:
> As I understood Video playback will be virtually impossible on the 
> freerunner, at least from the sd card (which is the only sensible 
> location to store videos on the neo ftm).

I did some testing on that with GTA01.

> Please correct me if I misunderstood.

Even with GTA01 it was possible - though the tests I made there are not
valid for GTA02 (don't have one yet).

What I found out with mplayer is:

1) H.264 will take to much time to decompress (even at low bitrates)
2) SDL will be the fastest way to output without HW acceleration
3) using H.263 (as Youtube does) I could get the best 
   compression/bitrate/speed ratio
4) using 320x240 and scale to 640x480 (480x640) is doable

Some of those findings are documented at the buttom of 

> If I interpreted Carsten right 640x480 video will 
> display at 5-10 fps at best, right?

Actually with GTA01 I've had 13 fps in fullscreen mode (320x240 ->
480x640) which looked really okay and was viewable.

A 640x480 H.263 though with reasonable bitrate took to much cpu-power to

Anyway, with GTA02 you should take a try - it seems doable in SW even
without 2D acceleration, as it just has more cpu power. - try to start

mencoder -quiet -ofps 13 -vf scale -zoom -xy 352 -af channels=1:0:0:1:0
-oac lavc -ovc lavc -lavcopts \
acodec=mp3:vcodec=h263p:autoaspect=1:vbitrate=200:abitrate=32 \
-o <outfile> <infile>

mplayer -autosync 30 -vf scale -zoom -xy 640 -vf rotate=1 -sws 0
-nodouble \
-vo sdl -fs -framedrop <tagetfile>

Greetings from Berlin


/* Web:  | Tel:    +49 (0)170/6692447      *
 * Blog: | ICQ:    93248497                *
 * GPG-ID:  4BBB6525 (..2009)   | Jabber: kristian at        *
 * Twitter: kristian_m          | MSN:    mueller.kristian at */

More information about the community mailing list