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diff --git a/abs/core-testing/local-website/htdocs/mythtv-doc/mythtv-HOWTO-10.html b/abs/core-testing/local-website/htdocs/mythtv-doc/mythtv-HOWTO-10.html deleted file mode 100644 index 636696e..0000000 --- a/abs/core-testing/local-website/htdocs/mythtv-doc/mythtv-HOWTO-10.html +++ /dev/null @@ -1,387 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> -<HTML> -<HEAD> - <META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.21"> - <TITLE>Installing and using MythTV: Configuring mythfrontend.</TITLE> - <LINK HREF="mythtv-HOWTO-11.html" REL=next> - <LINK HREF="mythtv-HOWTO-9.html" REL=previous> - <LINK HREF="mythtv-HOWTO.html#toc10" REL=contents> -</HEAD> -<BODY> -<A HREF="mythtv-HOWTO-11.html">Next</A> -<A HREF="mythtv-HOWTO-9.html">Previous</A> -<A HREF="mythtv-HOWTO.html#toc10">Contents</A> -<HR> -<H2><A NAME="s10">10.</A> <A HREF="mythtv-HOWTO.html#toc10">Configuring mythfrontend.</A></H2> - -<P>Once you have completed configuration of your backend systems, the next -step is to configure the frontend client. </P> -<P>When you start mythfrontend for the first time, it will attempt to connect -to a configuration database on the local machine. If there is none, a -"Database Configuration" screen will appear, and you will need to fill in -some details. The "Host name" field needs the backend or database server's -IP address or DNS name, and the User or password fields may need to be set -to match your database user accounts. After editing those fields, press -Enter twice to write these configurations on your local machine, and attempt -to connect to the database. If you make any mistakes, the screens will pop -up again.</P> -<P>Now that mythfrontend has started up, you should have a number of -buttons/choices. Before doing anything, go to TV, then to Setup and -configure the frontend client. -<FIGURE> -<EPS FILE="stop.eps"> -<IMG SRC="stop.png"> -<CAPTION><B>NOTE</B>: You should go through the various setup screens in -mythfrontend before using any other modules to ensure that the the database -is correctly initialized.</CAPTION> -</FIGURE> -</P> -<H2><A NAME="ss10.1">10.1</A> <A HREF="mythtv-HOWTO.html#toc10.1">General</A> -</H2> - -<P>The General screen has configuration items that don't really fit anywhere -else. The first few configuration items ask you to indicate the number of -seconds to record before or after a program, which is useful if the -broadcast network or your system clock are out of sync and will help prevent -you missing the beginning or end of a program. </P> -<P>To change the value, use the left and right arrow keys to increment and -decrement the number of seconds. When you're satisfied with the result, use -the down arrow to put the input focus on the Next button or press RETURN to -continue to the next page.</P> -<P>The next page has a number of options to do with how channels are displayed -on your system. The help text will give you more information. Move the -focus to Next and press the space bar to continue.</P> -<P>The last General page sets up some final configuration items. See the help -text for more information.</P> - -<H2><A NAME="ss10.2">10.2</A> <A HREF="mythtv-HOWTO.html#toc10.2">Appearance</A> -</H2> - -<P>This set of screens is mostly concerned with how MythTV will look on your -system. From here, you can choose different themes and set the resolution -of your system.</P> - -<H2><A NAME="ss10.3">10.3</A> <A HREF="mythtv-HOWTO.html#toc10.3">Program Guide</A> -</H2> - -<P>Fairly self explanatory. Note that the alternate program guide does not -use the same font settings as defined in Appearance, so if the EPG is -unreadable this is where you make the adjustments to fonts, number of -elements displayed, etc.</P> - -<H2><A NAME="deinterlace_"></A> <A NAME="ss10.4">10.4</A> <A HREF="mythtv-HOWTO.html#toc10.4">Playback </A> - </H2> - -<P>The one configuration item which may cause problems on your system is the -"Deinterlace playback" setting. MythTV uses a linear blend algorithm for -deinterlacing, which will improve how the image looks on your screen. -Deinterlacing requires that your processor support SSE. (Streaming SIMD -Extensions, aka "MMX2"). Early Intel Celeron (those that don't use the -Coppermine 0.18um core and are usually <600MHz), Pentium Pro and Pentium II -CPUs do not have SSE, so make sure you haven't enabled deinterlacing if -your processor doesn't support it. If you enable it, and your processor -doesn't support SSE, you will get "Illegal Instruction" errors.</P> -<P>To determine if you've got SSE on an Intel processor, you can: -<BLOCKQUOTE><CODE> -<PRE> -$ cat /proc/cpuinfo -[snip] -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca -cmov pat pse36 mmx fxsr sse -</PRE> -</CODE></BLOCKQUOTE> -</P> -<P>Notice the <B>sse</B> at the end of the line - this tells you that this -processor will be able to deinterlace correctly.</P> -<P>On an AMD processor, look for "3dnow" in the cpuinfo line; "3dnow" is AMD's -implementation of SSE instructions, so if your processor has 3dnow you -shouldn't have any issues with deinterlacing.</P> -<H3>Video Filters</H3> - -<P>MythTV provides a means of employing video filters while recording and -during playback. These filters can be used to improve or modify the video -image, including hiding the effects of an interlaced image or reducing the -impact of noise in a poor video signal. The following is a brief -introduction to introduce you to the filters that are available in MythTV -version 0.20 and higher.</P> -<H3>Applying filters</H3> - -<P>One or more filters can be included in a "filter chain". The filters to -be used are identified in a "filter string". A filter string is a group of -filter names and parameters separated by commas. To include parameters, the -filter name is followed by "=" and the parameter information. There should -be no spaces in the filter string. Here is an example filter string:</P> -<P>With parameters: <CODE>kerneldeint=10:1,denoise3d=12</CODE></P> -<P>Without: <CODE>kerneldeint,denoise3d</CODE></P> -<P>Recording filters are set for each individual channel. These may be used -when encoding in software (MPEG-4, RTjpeg) but do not apply when using a -capture card with hardware encoding such as those supported by the ivtv -driver, DVB, HDTV or MJPEG cards. You can run MythTV's "setup" program and -select the "Channel Editor". On the first page for each channel, you can -enter a filter string in the box titled "Video filters". If you are running -"mythweb" on your web server, you can click on "Settings" then "Channels" -and enter filter strings in the "videofilters" column.</P> -<P>Playback filters are per-host and apply to any recording you watch from the -frontend where filters have been applied. Playback filtering can only -work with software decoding so the viaslice, xvmc, and ivtv outputs ignore -filters entirely. From "mythfrontend" go to Setup->TV Settings->Playback. -Enter your filter string in the box titled "Custom Filters".</P> - -<H3>Currently Available Filters</H3> - -<P>"Deinterlace Playback" checkbox.</P> -<P>This implements special behavior needed for the "bobdeint" filter but can -also be used to choose any of the deinterlace filters. If you prefer, you -may leave this unchecked and include any of the deinterlace filters, other -than "bobdeint", in your custom filter chain.</P> -<P>o The "invert" filter</P> -<P>Invert ignores any parameters and inverts the pixel values of the video -frames. In other words, a negative image. This would rarely be useful but -may be a good example to verify that your filter strings take effect.</P> -<P>o The "linearblend" filter</P> -<P>It is a simple deinterlacing filter that ignores parameters and works by -blending adjacent lines. It replaces combing in interlaced video with a -less distracting "ghost" image.</P> -<P>o The "bobdeint" filter</P> -<P>This filter splits the interlaced image into two separate fields that -can be line doubled then displayed at twice the frame rate. If the -display is at the same refresh rate as the recording (59.92Hz NTSC or -50Hz PAL) this will cause each refresh to show objects in motion in -a new position with no jagged edges. However, if the display is not -synchronous, it will cause flickering or the appearance of the picture -moving up and down by one line.</P> -<P> -<FIGURE> -<EPS FILE="stop.eps"> -<IMG SRC="stop.png"> -<CAPTION><B>NOTE</B>: This filter requires the frame rate to be doubled -and therefore can only be used with the "Deinterlace Playback" checkbox. -Do not include this in your filter chain.</CAPTION> -</FIGURE> -</P> -<P>o The "kerneldeint" filter</P> -<P>Kerneldeint is a more complex deinterlacing filter which applies a filter -kernel using input from several lines. It generally removes combing without -a "ghost" image, sometimes leaving a faint outline of the image from the -other field. It is considered to be less distracting to watch than -linearblend or no filter at all. It accepts one or two integer parameters -separated by a colon.</P> -<P>The first parameter is the filter threshold and defaults to 12. Adjacent -lines differing by more than the threshold value are filtered. The second -option defaults to 0. If set to a non-zero value, it will cause the filter -to skip chroma, and filter only the luminance. It may be useful on some -capture cards which do not capture the chroma fields of interlaced video -correctly.</P> -<P>o The "onefield" filter</P> -<P>This is a simple one-field deinterlacing filter that uses only one field of -the interlaced video. By default it keeps the top field, though passing the -parameter "bottom" will cause it to keep the bottom field instead.</P> -<P>This filter is primarily useful for those who display 1080i HDTV signals -with a video mode that has 540 pixels vertically. The advantage over other -deinterlacing filters is that scenes with motion never show combing or -ghosting.</P> -<P>o The "adjust" filter</P> -<P>This filter adjusts the digital values for luma and chroma to ensure that -they will fall within the ranges specified in the ITU-R601 standard. By -default, this corrects a known problem for the luma range used by bt8x8 -chips which causes video to look washed out. If parameters are passed, there -need to be exactly six. However, passing a single parameter of "-1" will -disable the filter.</P> -<P>1: luma minimum input value (int) -2: luma maximum input value (int) -3: luma gamma correction (float) -4: chroma minimum input value (int) -5: chroma maximum input value (int) -6: chroma gamma correction (float)</P> -<P>The default bt8x8 correction values are equivalent to -"16:253:1.0:2:253:1.0". Output ranges are fixed at ITU-R601 values (16-235 -luma, 16-240 chroma).</P> -<P><B>NOTE</B>: If it is not already specified in the filter chain, this -filter will be automatically applied when recording with the "bttv" driver.</P> -<P>o The "quickdnr" filter</P> -<P>A fast temporal denoiser. This can take 1, 2 or 4 parameters, each being a -value from "0" for the least filtering to "255" for the greatest filtering. -With one parameter, the filter will compute the values it should use for all -of its variables. Two parameters will set the filter strength for luma and -chroma independently. If you are interested in how the algorithm works, you -may examine the source code to see how four parameter are used.</P> -<P>o The "denoise3d" filter</P> -<P>A slower denoiser that applies a spatial and temporal low-pass filter. The -spatial filter can remove some noise that quickdnr can't, but a more -powerful CPU is needed. This filter accepts 3 float parameters:</P> -<P> -<UL> -<LI>luma spatial filter strength</LI> -<LI>chroma spatial filter strength</LI> -<LI>luma temporal filter strength</LI> -</UL> -</P> -<P>Reasonable defaults will be selected for omitted parameters. The chroma -temporal filter strength is calculated from the other filter strengths.</P> -<P>o The "crop" filter</P> -<P>Covers edges of video with black bars. This helps improve video quality -when the edges of the frame are distorted. By default, this removes 16 -pixels from each edge. This can optionally take four parameters representing -top:left:bottom:right. The number times 16 is the number of pixels to remove -so, for example, the default is "=1:1:1:1".</P> -<P>o The "forceyv12" and "forceyuv422p" filters</P> -<P>These force the filter manager to use the given format. You can use one of -these at the head of a filter chain to change the capture format. The most -likely use would be forceyuv422p to use YUV422P capture on cards with known -chroma interlacing problems with YV12.</P> -<P>There are some filters included in the MythTV source code that should -not be used:</P> -<P>o The "forcergb24" and "forceargb32" filters</P> -<P>The two RGB formats should not be used because there is no conversion filter -for them yet.</P> -<P>o The "convert" filter</P> -<P>It exists but don't use it. The filter manager uses this filter -automatically when it is unable to match the input/output formats of two -adjacent filters.</P> -<P>o The "postprocess" filter</P> -<P>While this exists in MythTV source code, it is currently not recommended for -use.</P> - -<H3>Usage Considerations</H3> - -<P>There are trade-offs to consider when deciding if it would be wise to use -a filter. Any processing will modify the original image so you should assess -if the filter has made a noticeable improvement to the picture in order to -justify the impact of the processing. Adding any filter will inherently -increase CPU usage. The impact can vary dramatically depending on your CPU -type and speed, the resolution of the recording, which filters you are using -and other factors. You can only determine what is right for you through -experimentation. However, as a starting point, here are some filter strings -that you may find useful:</P> -<P>For typical broadcast stations: "kerneldeint,quickdnr"</P> -<P>For stations with poor signal quality: "linearblend,denoise3d=12"</P> -<P>For synchronous TV-out: check Deinterlace with "Bob (2x framerate)"</P> - -<H2><A NAME="Recording"></A> <A NAME="ss10.5">10.5</A> <A HREF="mythtv-HOWTO.html#toc10.5">Recording </A> -</H2> - -<P>Depending on your capture card, MythTV offers different video encoders. -The following types of hardware encoding cards are supported: -<UL> -<LI>MJPEG - Zoran-based cards; see -<A HREF="http://mjpeg.sourceforge.net">http://mjpeg.sourceforge.net</A></LI> -<LI>MPEG-2 - iTVC15/16 based cards (Hauppauge PVR-250/PVR-350); see -<A HREF="http://ivtvdriver.org">http://ivtvdriver.org</A> </LI> -<LI>HDTV - pcHDTV cards; see -<A HREF="http://pchdtv.com">http://pchdtv.com</A> and -the Air2PC-ATSC-PCI see -<A HREF="http://www.cyberestore.com/product_info.php?cPath=28&products_id=103">http://www.cyberestore.com/product_info.php?cPath=28&products_id=103</A></LI> -<LI>DVB - cards supporting DVB; see -<A HREF="http://linuxtv.org">http://linuxtv.org</A></LI> -</UL> - -For cards without hardware encoding capabilities (all cards supported by -V4L not listed above), Myth includes two methods for software encoding: -RTjpeg and MPEG-4. RTjpeg has significantly fewer CPU demands than MPEG-4, -but it generates larger files than MPEG-4 for a given recording.</P> -<P>For DVB and HDTV cards, no further configuration is required after -setting up the card using the 'mythtv-setup' program. -For all other cards, configuration is done through MythFrontend. -Selecting 'Recording Profiles' from the 'TV Settings' screen will list -the profiles currently available for the cards in your system. -Depending on what types of cards you have installed you may see: -<BLOCKQUOTE><CODE> -<PRE> -(Create new profile group) -Software Encoders -Hardware MPEG Encoders -Hardware MJPEG Encoders -Transcoders -</PRE> -</CODE></BLOCKQUOTE> - -The '(Create new profile group)' option will allow you to create custom -profiles in case you have multiple backends. Note that custom profiles -are per backend and card type. If you have 2 MPEG-2 encoders in a given -backend system, creating a custom profile will affect both of them. This -option should not be needed otherwise.</P> -<P>The 'Transcoders' group is a little different from the others. Selecting -this group will result in a menu with the following options: 'RTjpeg/MPEG-4' -and 'MPEG-2'. These types indicate what transcoder options will be used for -a given input type (i.e. the 'MPEG-2' settings would be used to transcode -MPEG-2 files into MPEG-4. The source of the MPEG-2 stream (DVB, HDTV, or -PVR-x50) does not matter. Configuration of the options is the same as below -(although any resolution settings will be ignored).</P> -<P>Selecting any of the other options will show a new screen with a list of -four profiles: -<UL> -<LI>Default</LI> -<LI>Live TV</LI> -<LI>Low Quality</LI> -<LI>High Quality</LI> -</UL> -</P> -<P>The Default profile will be used for any recording which does not otherwise -have a specific profile assigned. The 'Live TV' profile will be used when -watching TV. The remaining two profiles are available for customizing to -allow for more precise control over what quality is used for a given -program.</P> -<P>Selecting a profile will allow you to adjust the relevant options for that -card. The most significant setting is the recording resolution, but you can -also choose encoding format, audio format, and tweak other encoder specific -properties.</P> -<P> -<FIGURE> -<EPS FILE="stop.eps"> -<IMG SRC="stop.png"> -<CAPTION><B>NOTE</B>: although the width and height can be changed to almost -anything, if you start MythTV and don't see video or you get "segmentation -fault" errors, it is likely that the video4linux (v4l) subsystem did not -like the height and width parameters specified. It's best to leave the -default as-is until you're sure that MythTV is operational.</CAPTION> -</FIGURE> -</P> -<P>See the -<A HREF="mythtv-HOWTO-23.html#capture_resolution_">What capture resolution should I use? How does video work?</A> section for more information.</P> - -<H2><A NAME="ss10.6">10.6</A> <A HREF="mythtv-HOWTO.html#toc10.6">Xbox Frontends</A> -</H2> - -<P>MythTV is able to control the LED on the Xbox to indicate backend -recording status. </P> -<P>To control the LED, you will need the <B>blink</B> program from the -xbox-linux project, which is installed as <CODE>/bin/led</CODE> on GentooX. On -Xebian (the new Ed's Debian) you must install it yourself. On other -distributions it may or may not be installed as a program called -<B>blink</B> and should be located in your path. (Type <CODE>which -blink</CODE> to see if the program is available.) If you do not have -<B>blink</B>, you may obtain it from the Xbox-Linux project site at -<A HREF="http://xbox-linux.sf.net/">http://xbox-linux.sf.net/</A>. The -program you need is part of the <CODE>eds_i2c_staff</CODE> module in CVS. Note -the spelling.</P> -<P>Once you have installed <B>blink</B> you will need to set permissions. -<B>blink</B> needs write permission to the i2c device to function -properly. There are three methods to accomplish this. First, you could run -<CODE>mythfrontend</CODE> as root, which is the simplest method, but could -potentially be a security risk. Next, you may make the <B>blink</B> -binary setuid root, which allows non-privileged users to run a program with -root capability. This is done by typing the command: -<BLOCKQUOTE><CODE> -<PRE> -$ su -# chmod u+s /path/to/blink -</PRE> -</CODE></BLOCKQUOTE> - -The final technique would be to set the <CODE>/dev/i2c/0</CODE> device read/write -for all users, but this is the least preferred method.</P> -<P>Now it's time to setup MythTV for Xbox hardware. Enter Setup -> General. -On the second page check the 'Enable Xbox Hardware' option. Upon reentering -the settings, you should have a new option named 'Xbox'. Within this option -you may select the distribution, LED colors for recording and the update -interval. If you select GentooX as the distribution <B>led</B> will be -used as the <B>blink</B> binary name, otherwise, <B>blink</B> is used. -Colors should be self explanatory. The update interval determines how often -the frontend should poll the backend to determine if the status has changed.</P> - -<HR> -<A HREF="mythtv-HOWTO-11.html">Next</A> -<A HREF="mythtv-HOWTO-9.html">Previous</A> -<A HREF="mythtv-HOWTO.html#toc10">Contents</A> -</BODY> -</HTML> |