mirror of https://github.com/mpv-player/mpv
applied Nick's patch
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3490 b3059339-0415-0410-9bf9-f77b7e298cf2
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DOCS/faq.html
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DOCS/faq.html
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@ -673,6 +673,240 @@ implement it, and send a patch. Don't ask for it.
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want to go to jail.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>Q:</TD><TD WIDTH=100%><B><font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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What card you may suggest me to buy?</font></font></b></td>
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</B></TD><TR><TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>A0:</TD><TD><font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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It's for your opinion only but our issues are:</font></font>
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</B></TD><TR><TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>A1:</TD><TD><font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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Speed:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>This
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parameter can be computed very easy:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>a)</b>
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which movies do you plan to watch:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>-
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MPEG1:</b> 320x200@32=256000</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>so
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you need only 256*25fps=6.4Mb/sec bandwidth (This format can be played
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in real-time on any PC since P-100 + S3Virge)</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>-
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MPEG4:</b> 640x480@32=1228800</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>you
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need videobandwidth 1.2*25fps=30Mb/sec To watch such movie in real-time
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you need enough power PC: (Celeron-450+DIMM based video card)</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>-
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MPEG2 (aka DVD or SDTV):</b> 1024x768@32=3145728</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>you
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need videobandwidth 3*30fps=90Mb/sec In extremal cases (if your video card
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supports IDCT decoding) this can be played on the same PC as for MPEG4</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>-
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HDTV (HighData TeleVision):</b> 2000x2000@32=16000000</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>i.e.
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videobandwidth = 16*30fps=480Mb/sec (This means also that you need at least
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32Mb of video memory to watch this stream: 16Mb for RGB area and 16Mb for
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YUV area)</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>b)</b>
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Bandwidth of PCI slot is: 33Mhz*32bit=132Mb/sec And PCI2.1 has 66MHz*32bit=265Mb/sec
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that is far enough for any movie playback (except HDTV streams which really
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require AGP bus).</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>c)</b>
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What memory type should be installed on video card:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>SIMM</b>
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- avoid that</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>DIMM</b>
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- good if your video card has 128-bit memory access.</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>DDR</b>
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- is far enough for all types.</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>Note:
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By DGA comparision - there is no any visible difference between video cards
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which have installed the same type of video memory.</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>Resume:</b>
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If you have enough power CPU (Celeron-450 or K6-2-500) it would be enough
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to buy any video card which has at least 8Mb of DIMM or DDR memory.</font></font>
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</B></TD><TR><TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>A2:</TD><TD><font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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Quality:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>This
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question was investigated in depth at:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><a href="http://www.anandtech.com">http://www.anadtech.com</a>
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AnandTech - Video Card Roundup - DVD Quality, Features & Performance
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(October 2000)</font></font>
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</B></TD><TR><TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>A3:</TD><TD><font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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WORKING features under Linux:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>If
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you are win32 user then probably you have support (from driver and DirectX8
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side) for any feature which was introduced in your chip.</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>But
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for <b>linux </b>users:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>Currently
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I know only several vendors which have more or less advanced support under
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Linux:</font></font>
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<br>
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<table BORDER COLS=5 WIDTH="100%" NOSAVE >
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<tr>
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<td> </td>
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<td>
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<center>Matrox</center>
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</td>
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<td>
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<center>ATI</center>
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</td>
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<td>
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<center>NVidia</center>
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</td>
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<td>
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<center>S4 Savage</center>
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</td>
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</tr>
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<tr>
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<td>Driver's provider</td>
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<td>enthusiasts</td>
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<td>enthusiasts</td>
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<td>OEM + enthusiasts</td>
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<td>enthusiasts</td>
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</tr>
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<tr>
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<td>Driver's quality</td>
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<td>Best(X11,kernel)</td>
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<td>Best(X11,GATOS,kernel)</td>
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<td>Buggy(X11 only)</td>
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<td>Best(X11 only)</td>
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</tr>
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<tr>
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<td>VIDEO OVERLAY</td>
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<td></td>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td>BES and YV2RGB</td>
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<td>YES</td>
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<td>YES</td>
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<td>YES</td>
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<td>YES</td>
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</tr>
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<tr>
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<td>scaling filters</td>
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<td>N/A</td>
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<td>YES</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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<tr>
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<td>adaptive deinterlace</td>
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<td>NO</td>
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<td>YES</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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<tr>
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<td>Video equalizer (hue, contrast, saturation, color correction)</td>
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<td>N/A</td>
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<td>PARTLY (under devel)</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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<tr>
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<td>Alpha blending, color and video keys</td>
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<td>PARTLY</td>
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<td>PARTLY (under devel)</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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<tr>
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<td>Video capture</td>
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<td>N/A</td>
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<td>YES(GATOS)</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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<tr>
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<td>TV-out</td>
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<td>YES</td>
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<td>YES</td>
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<td>N/A</td>
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<td>N/A</td>
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</tr>
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</table>
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<p><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>Well
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- it's very rude observing of video card. Indeed we should pay our attention
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for models of video card:</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>For
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example if MatroxG400(G450) drivers support TV-out then G550 has no such
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support.</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>Other
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sample: Adaptive deinterlacing exists only since Rage128 chip and isn't
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present on Mach64+ ones. Same as 3D features are far different from Mach64
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to Radeon2 8500 with trueform possibilities.</font></font>
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<p><b><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>ANYWAY
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- MPLAYER'S TEAM DOESN'T ACCEPT ANY CLAIMS IF YOU AFTER</font></font></b>
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<br><b><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>READING
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OF THIS MATERIAL WILL BUY CARD WHICH IS UNSUCCESSFUL FOR YOU!!!</font></font></b>
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<br><b><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>THIS
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MATERIAL IS ONLY OUR VISION.</font></font></b>
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<p><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>Q:</b>
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If PCI slot is far enough for most types of movies then why S3 Virge</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1>is
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too slow for them?</font></font>
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<br><font face="Verdana, Arial, Helvetica, sans-serif"><font size=-1><b>A:</b>
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Due to its SIMM memory.</font></font>
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD COLSPAN=3>
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<B><A NAME=5.6><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>5.6. Encoding</A></B>
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</TD><TR><TD COLSPAN=3> </TD><TR>
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