Well, after doing a few tests, (mainly thanks to ahven and SpeedEvil on IRC), the Neo can handle a 160x128 H264 (with CABAC) encoded video at 40kbps with a 12kbps audio track. The fun comes in with the scaling. Scaling to 320x240 with no frame dropping is possible if I encode the video as baseline H264. However, I think the Freerunner, especially with a beefier processor and hardware scaling, should perform quite a bit better. The scaling seems to give quite a big performance hit.
Cheers, Federico PS) I do not own a Neo, and I'm not an expert on anything On 4/27/08, Kristian 'kriss' Mueller <[EMAIL PROTECTED]> wrote: > 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 > http://wiki.openmoko.org/index.php?title=Video_Player > > > > 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 > decode. > > 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 > with: > > 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 > > Kristian > > > -- > /* Web: http://www.mput.de | Tel: +49 (0)170/6692447 * > * Blog: http://mput.de/blog | ICQ: 93248497 * > * GPG-ID: 4BBB6525 (..2009) | Jabber: [EMAIL PROTECTED] * > * Twitter: kristian_m | MSN: [EMAIL PROTECTED] */ > > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community >
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