[K12OSN] Pixelation with MPlayer

David Hopkins dahopkins429 at gmail.com
Mon Mar 5 18:10:07 UTC 2007

Hmmm ... trouble is that for the Epia 533, the video is on-board (ViA).  I
guess I will have to see if I can tweak what  X loads for the drivers for
them.  For the Compaqs, I can disable the on-board and try a spare video
card I have sitting around.

Dave Hopkins

On 3/5/07, "Terrell Prudé Jr." <microman at cmosnetworks.com> wrote:
>  I've watched 640x480 videos (MPEG4) without any problems on my thin
> client with MPlayer.  The key was to swap the video board in the thin client
> for something a bit more powerful.  In my case, it was the Matrox Millenium
> G400; doing that solved all my MPlayer issues.  It also, BTW, made TuxType
> play faster.  Heck, I'm able to watch Tom's Hardware videos, in MPEG4, at
> 720x480, without any framedrops, pixelations, whatever--just nice, smooth
> video.  No, I don't have to throw the -framedrop switch, either.
> Folks, watching videos on thin clients WORKS FINE.  I do it all the time.
> If you can, please try swapping your video board and see what happens.
> --TP
> _______________________________
> Do you GNU!?
> Microsoft Free since 2003 <http://www.gnu.org/>--the ultimate antivirus
> protection!
> David Hopkins wrote:
> Didn't mean for this to cause problems, so to speak, but ... what I have
> observed is that the video clip is mostly watchable at the 320x240
> resolution that seems to be the 'native' resolution of the clip.  However,
> it pixelates which is where the teachers start chiming in about the inferior
> quality.  It does get worse as the clips get larger:  A 5Mb clip and an
> 'extended' version of the clip that is 13Mb do not have the same playback
> characteristics, with the larger and longer clip looking worse.
> My clients consist of Epia 533-based systems and donated Compaq EN SFF
> systems.  Either can play back without issues as long as they are fat
> clients. I have Gb from the server to the switch and 100Mb to the clients.
>  If I specify using X11-only, then MPlayer says that the Compaq does not
> have the resources to play back the video.  Using Xv, it does but is
> pixelated on fast motion scenes. :(
> MPlayer has alot of options for framedropping, lower fps playback, etc,
> and I will try and play with these to see if there is some magic combination
> that provides overall better quality.
> I really hope that the Atlanta work goes well since it will help me when I
> periodically try to the the State of Delaware DOE interested in the thin
> client approach.  I have a few Reps and Senators that know about the option,
> but getting them to commit time to really looking at it has been tough and
> little glitches like lower quality movie playback seems to 'impress' them
> more than the phenomenal uptime of the systems, ease of use, ease of
> management, etc.
> Slightly off-topic, but the same instuctor that is really vocal about the
> playback also was vocal about not getting sound on a video clip a few weeks
> back.  After playing it back in a pure Windows environment, it was finally
> possible to convince him that the clip in question didn't, in fact, have any
> sound and was only video.
> Sincerely,
> Dave Hopkins
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