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− | = Video Cards = | + | =Video display cards= |
| + | Video (graphics) cards are essential in processing image data and displaying it on screen. There are several prominent graphics card manufacturers with varying driver support and performance on Linux. Choosing a sufficiently powerful graphics card is key to having an enjoyable media experience. |
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− | Video cards provide the graphical interface for MythTV and modules. A standard video card will output all display to a VGA port to display on a standard computer monitor. Most MythTV users are looking to have this display outputted to a television or other display device. This can be accomplished by either using a card that has integrated TV-out capabilities or using a VGA to NTSC/PAL (television) converter.
| + | ==Intel integrated== |
| + | Intel provide open-source drivers included in the Linux kernel. These are the simpliest to get working and are maintained by Intel. The Haswell HD graphics are powerful enough to playback 1080 content and are included on the CPU die. For more information see [[Intel_Integrated_Graphics|here]]. |
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− | == TV-out == | + | ==nVidia== |
| + | nVidia cards are generally considered the best for post-processing filters and for access to the [[VDPAU]] (video decoding library). However these require the proprietary drivers that may not be instantly available in your distribution. For installation instructions see the [[Nvidia]] wiki page. |
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− | == NTSC/PAL converter == | + | ==AMD== |
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− | I can recommend the [http://www.focusinfo.com/products/tview_micro/tview_micro.htm TView Micro] as a device that I have used with success with MythTV. Instead of relying on driver support and extra hardware to provide video out, I opted for this device which handles VGA resolutions and requires only a standard video card. If you find a video card with MPEG-2 acceleration or other features, it is easy to take advantage of them since you are not relying on any TV out capabilities, just standard VGA.
| + | ''If you have information / experience on the AMD graphics (APU etc) please add it here'' |
− | --[[Kevin Kuphal]]
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− | == Display Quality ==
| + | The driver installation can be handled from the instructions from [[AtiProprietaryDriver | here ]]. |
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− | It has been noted on the mailing list at http://www.gossamer-threads.com/lists/mythtv/users/68744 that since the 0.14 release of MythTV there have been some fixes and enhancements for getting the picture quality of MythTV near the quality you see of your standard television:
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− | <pre><nowiki>
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− | There is a new filter added after the 0.14 release in CVS that
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− | fixes an outright mistake for bttv luma. It also has parameters
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− | that allow you to make further adjustments that you can't do for
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− | the hardware cards. I've played with this over the past few months.
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− | By comparing direct cable on one input and myth on another, I've
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− | got the color reproduction almost identical. Even though the
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− | myth input is a little fuzzier, the picture is otherwise as
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− | vivid. To set these parameters, run your mysql client and
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− | enter these two lines.
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− | update channel set contrast=21500,brightness=37500,colour=32768,hue=32768;
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− | update channel set videofilters='adjust=34:253:1.0:23:232:1.0';
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− | If your worried that you might have to undo this, these will
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− | reset the defaults:
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− | update channel set contrast=32768,brightness=32768,colour=32768,hue=32768;
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− | update channel set videofilters='';
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− | Also, especially if you have an AverTV card, they tend to over-
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− | saturate quite a bit by default. Hauppage tend to under-saturate.
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− | If you have v4l2 support in your kernel, v4lctl can normalize
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− | the chroma levels with Automatic Gain Control (AGC). | |
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− | : bjm@moktoo ; v4lctl -c /dev/video0 setattr 'chroma agc' on
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− | : bjm@moktoo ; v4lctl -c /dev/video0 list
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− | attribute | type | current | default | comment
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− | -----------+--------+---------+---------+-------------------------------------
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− | norm | choice | NTSC | PAL | PAL NTSC SECAM PAL-Nc PAL-M PAL-N NTSC-JP PAL-60
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− | input | choice | Televis | Televis | Television Composite1 S-Video
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− | audio mode | choice | lang1 | mono | mono stereo lang1 lang2
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− | bright | int | 37500 | 32768 | range is 0 => 65535
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− | contrast | int | 21500 | 32768 | range is 0 => 65535
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− | color | int | 32768 | 32768 | range is 0 => 65535
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− | hue | int | 32768 | 32768 | range is 0 => 65535
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− | mute | bool | off | off |
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− | chroma agc | bool | on | off |
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− | combfilter | bool | off | off |
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− | automute | bool | on | off |
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− | luma decim | bool | off | off |
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− | agc crush | bool | on | off |
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− | vcr hack | bool | off | off |
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− | whitecrush | int | 207 | 207 | range is 0 => 255
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− | whitecrush | int | 127 | 127 | range is 0 => 255
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− | If your output is missing "chroma agc" and some of the others
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− | then you do not have v4l2 support.
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− | </nowiki></pre>
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− | [[Category:Hardware]] | |
Video (graphics) cards are essential in processing image data and displaying it on screen. There are several prominent graphics card manufacturers with varying driver support and performance on Linux. Choosing a sufficiently powerful graphics card is key to having an enjoyable media experience.
Intel provide open-source drivers included in the Linux kernel. These are the simpliest to get working and are maintained by Intel. The Haswell HD graphics are powerful enough to playback 1080 content and are included on the CPU die. For more information see here.
nVidia cards are generally considered the best for post-processing filters and for access to the VDPAU (video decoding library). However these require the proprietary drivers that may not be instantly available in your distribution. For installation instructions see the Nvidia wiki page.