[K12OSN] Pixelation with MPlayer
David Hopkins
dahopkins429 at gmail.com
Wed Mar 7 12:14:46 UTC 2007
Update: I have now tested an Epia M which has the cle266 video chipset (via
driver is loaded by ltsp). I was hoping that this would resolve the issue
but the image still pixelates severely. Perhaps the issue isn't with the
video card, but how I compiled mplayer?
So ... output from mplayer -vo help is:
[student01 at ncslts3 ~]$ mplayer -vo help
MPlayer 1.0rc1-4.1.1 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Xeon(TM) CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
Available video output drivers:
xv X11/Xv
x11 X11 ( XImage/Shm )
xover General X11 driver for overlay capable video output drivers
gl X11 (OpenGL)
gl2 X11 (OpenGL) - multiple textures version
xvidix X11 (VIDIX)
cvidix console VIDIX
null Null video output
mpegpes Mpeg-PES to DVB card
yuv4mpeg yuv4mpeg output for mjpegtools
png PNG file
tga Targa output
pnm PPM/PGM/PGMYUV file
md5sum md5sum of each frame
and the output from playing a video is:
[student01 at ncslts3 ~]$ mplayer Desktop/Shaky_Ground.mov
MPlayer 1.0rc1-4.1.1 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Xeon(TM) CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
Playing Desktop/Shaky_Ground.mov.
ISO: File Type Major Brand: Original QuickTime
Quicktime/MOV file format detected.
VIDEO: [SVQ3] 320x240 24bpp 15.000 fps 0.0 kbps ( 0.0 kbyte/s)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffsvq3] vfm: ffmpeg (FFmpeg Sorenson Video v3 (SVQ3))
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 1 ch, s16le, 31.9 kbit/4.52% (ratio: 3984->88200)
Selected audio codec: [ffqdm2] afm: ffmpeg (FFmpeg QDM2 audio decoder)
==========================================================================
[AO ESD] latency: [server: 0.56s, net: 0.00s] (adjust 0.56s)
AO: [esd] 44100Hz 1ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 320 x 240 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 320x240 => 320x240 Planar YV12
Shared memory not supported
Reverting to normal Xv
Shared memory not supported
Reverting to normal Xv
A: 14.2 V: 14.3 A-V: -0.018 ct: -0.068 195/195 3% 0% 2.1% 0 0
I did try invoking xvidix, but that gave an error about not being able to
determine which driver to load. If I run as root, it detects the server's
onboard video (8Mb rage XL), but then the video displays a green screen and
nothing else.
So ... any suggestions on how to recompile mplayer? Or try and download the
latest rpm again? This has to work since LTSP uses the same mb's that I am
using as part of their testing. It must be something that I am doing wrong
at this point. I can try recompiling mplayer with any suggestions in order
to get the playback cleaner.
Sincerely,
Dave Hopkins
On 3/5/07, David Hopkins <dahopkins429 at gmail.com> wrote:
>
> I went over to the school today and checked my thin clients. They are
> Epia533 but they have the PLE133 video chipset. This is a real downer for
> me since I don't see where this chipset (which uses the trident video
> driver) has any support for MPEG acceleration (or whatever it is called).
> Apparently later versions have the CLE266 (Unichrome) chipset which does but
> you have to be careful since they are still selling ones with the PLE133. We
> have had these clients since Spring 2003 and they run flawlessly (even
> ordered another 30 Spring 2005), but ... I am now not sure if they can
> handle video streams well enough. I guess I will be spending time looking
> for more recent drivers, maybe a BIOS update or somesuch adds better support
> for video. Or, see if they support an add-in video card and purchase them
> but we have 75 of them at this point and that could run ~2K.
>
> If anyone knows how to get a better driver, please let me know. I can't
> even determine where the trident driver is loaded from: best guess is it is
> bundled with the Xorg software? There is a tridentfb.ko, but I wasn't
> able to get it to load.
>
> Hopefully, tomorrow will be better. :)
>
> Sincerely,
> Dave Hopkins
>
> On 3/5/07, "Terrell Prudé Jr." < microman at cmosnetworks.com> wrote:
>
> > Actually, the full-screen bit is where your video chipset takes over.
> > Decompressing the video stream from, say, MPEG1/2/4, etc., does use the
> > server CPU, but scaling the video, once decompressed, is a function of the
> > video board. Pop in the right device driver, and your teachers should be
> > happy.
> >
> > Please, keep us updated!
> >
> > --TP
> > _______________________________
> > Do you GNU!?
> > Microsoft Free since 2003 <http://www.gnu.org/>--the ultimate antivirus
> > protection!
> >
> >
> > David Hopkins wrote:
> >
> > I also just noticed from the LTSP wiki that my particular mb's don't
> > necessarily get the correct configuration for the video chipset. I have
> > min-itx based systems with VIA, so I will try adding the XSERVER = via line
> > and see what happens.
> >
> > Of course, all the teachers want to run at full screen on the systems
> > which is 1024x768 and I am not sure what that is going to do to the server.
> > :(
> >
> > Thanks for all the great info.
> >
> > Sincerely,
> > Dave Hopkins
> >
> >
> > On 3/5/07, "Terrell Prudé Jr." <microman at cmosnetworks.com> wrote:
> > >
> > > Yes, it sure could. I saw that 90-client-per-server figure and went,
> > > "WHOA!!!" I did some server CPU tests on my own server, and here's what I
> > > found:
> > >
> > > 640x480 MPEG4 clip: 21% CPU/session
> > > 320x240 MPEG4 clip: 7% CPU/session
> > >
> > > The CPU's are 1.2GHz Athlon MP's. This is per CPU core, BTW, so if
> > > you've got four such cores, you get just under 4x the capacity.
> > >
> > > --TP
> > > _______________________________
> > > Do you GNU!?
> > > Microsoft Free since 2003 <http://www.gnu.org/>--the ultimate
> > > antivirus protection!
> > >
> > >
> > > Petre Scheie wrote:
> > >
> > > Could this be an issue of quantity? That is, Terrel, how many clients
> > > have you got simultaneously watching the videos? If Jim's got an average of
> > > 90 clients per server, even though they're big boxes (I've seen 'em), might
> > > that number be more than the server can handle for video?
> > >
> > > Petre
> > >
> > > Terrell Prudé Jr. 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/> <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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