[MPlayer-users] Re: [Mplayer-matrox] stripes in image with (x)mga and ffmpeg on G200

[Diego Biurrun]

Thanks for your quick answer!

Low memory seems to only explain part of this.  If I run at
1280x1024 at 16 I do get some extra stripes in the left half of the
image, however at 1152x768 at 16 (my standard X resolution) I have no
playback problems when using divx4 codec (-vfm 7) or the win32 codecs
but I do get those stripes with ffmpeg (-vfm 5).  Both times I used
-vo xmga, so this should rule out mga_vid, shouldn't it?  Performance
for ffmpeg is better, audio does get out of sync with win32 and divx4
and I would much prefer to use an Open Source codec if possible.  Is
this a bug in ffmpeg?  Should I report this to the ffmpeg people?
Thanks

Diego

Arpi writes:
 > Hi,
 > 
 > seems to be low memory problem.
 > limit your X to lower resolution, your G200 is not enough for 1280x24bpp + 4
 > full video buffers (for mga_vid)... so mga driver overwrites teh framebuffer
 > of your screen -> black stripes.
 > Xv, X11 uses single buffer, so no vsync and triple buffering), but needs less
 > memory
 > 
 > 
 > > Hello!
 > > 
 > > First I would like to state how satisfied I am with mplayer.  It gives
 > > me performance at least equal to Windows Media Player on my machine
 > > and has just ditched my last reason to occasionally boot windows :-)
 > > Thanks for your excellent work!
 > > 
 > > One problem remains, though.  I have a divx file that gets thin
 > > horizontal black stripes in the right half of the screen when played
 > > with "-vo (x)mga -vfm 5".  When played in fullscreen or with -vo xv or
 > > -vo x11 or without -vfm 5 it runs fine but considerably slower.
 > > 
 > > I get the following results when changing resolution and bitdepth:
 > > 
 > >                16bpp            24bpp
 > > 800x600          o                o
 > > 1024x768         o                -
 > > 1152x864         -                -
 > > 1280x1024        -                -
 > > 
 > > o = picture ok, - = stripes in picture
 > > 
 > > But what is going wrong?  And why only in one specific vc/vo
 > > combination?  Is this a mplayer problem or a low level driver issue?
 > > I do not really want to change my display resolution just to watch a
 > > movie, unless it is full screen, but the problem does not appear when
 > > viewing full screen..
 > > 
 > > I tried with latest CVS as well as 0.6, gcc 2.95-4 and 3.0.3, always
 > > the same problem.
 > > 
 > > I have a K6-2 500 and a Matrox G200 AGP card with 8MB SGRAM.  I run X
 > > 4.1.0 with the Matrox 1.4.3 drivers, although I also tried the Xfree
 > > builtin driver with the same result.  My soundcard is a Creative SB
 > > Live! running the stock kernel drivers.
 > > 
 > > My distribution is an up to date Debian woody (testing) with custom
 > > compiled kernel 2.4.17 and libc 2.2.4, gcc 2.95-4, as and ld
 > > 2.11.92.0.12.3.
 > > 
 > > I have uploaded a dd'ed chunk of the avi and the text of this email to 
 > > ftp://mplayerhq.hu/MPlayer/incoming/stripes.avi
 > > ftp://mplayerhq.hu/MPlayer/incoming/stripes.txt
 > > 
 > > A friend of mine with a G400 could play the file with the same options
 > > without problems, so this might be G200 specific.
 > > 
 > > Any help would be greatly appreciated, I will gladly provide more
 > > information if necessary.  Below are the outputs of the mplayer -v run
 > > as well as lspci -v and cat /proc/cpuinfo.
 > > Thanks a lot
 > > 
 > > Diego Biurrun