Re: 720p video on G4?
Hi there,
Sorry for jumping in late here.
On Sep 14 2009, José JORGE wrote:
> A Monday 14 September 2009 19:00:08, drz escreveu:
> > In that package is the Firmware for R3xx ATI cards. Maaaybe this
> > will speed things up a little, but I dont think it will be enough
> > for 720p.
>
> A simple way to check if the CPU can decode the 720p, even with an
> ideal GPU :
Gee, I wish that I had both a fast GPU & CPU like you guys have (I only
have a G3 and Rage 128 here).
> mplayer -vo null movie720.avi
Indeed. Using
$ mplayer -nosound -vo null -benchmark foo.avi
is also a good idea to see how the machine works (if it is not CPU
bound), especially after doing something like:
$ dd if=foo.avi of=/dev/null
to get the file in the cache. Depending on the format of the video (say,
a H.264 video), it takes quite a good amount of CPU to decode the video.
Converting it to a simpler format (say, MPEG-4 Part 2) might be a good
workaround.
To check the memory bandwidth of your machine, one simple-minded tool
that I used in the past is mbw (try: apt-cache show mbw).
And I can report that I got some low-resolution H.264 videos to be
playable on my 600MHz G3 iBook with mplayer and the options:
-vfm ffmpeg -lavdopts fast
This proved to be useful to play even Steve Job's video from this month.
For a source of some short 720p videos, you can try some available on
youtube or on Apple's quicktime section of the site.
Regards,
--
Rogério Brito : rbrito@{mackenzie,ime.usp}.br : GPG key 1024D/7C2CAEB8
http://www.ime.usp.br/~rbrito : http://meusite.mackenzie.com.br/rbrito
Projects: algorithms.berlios.de : lame.sf.net : vrms.alioth.debian.org
Reply to: