mirror of https://github.com/mpv-player/mpv
man page documentation
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A documentation about MPlayer's man page
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========================================
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About the documentation
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-----------------------
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This guide should be used as a reference for questions about the man page
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structure. It's not a strict guide but we recommend following it to get a
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uniform man page.
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What belongs to the man page?
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-----------------------------
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- option descriptions (all)
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- usage (options, config files, controls, slave mode)
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- basic examples
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What doesn't belong to the man page?
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------------------------------------
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- instructions of a process (installation, encoding, etc)
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- detailed valuations or hints
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- tutorials, guides
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How should patches look like?
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-----------------------------
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Follow the rules in patches.txt, they apply to the man page too.
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Exceptions are:
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- Cosmetic patches are allowed but should be done seperately from the real
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changes, be marked as cosmetic changes and shouldn't change the general
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style without reasons/permissions
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- The same applies for spellchecks
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How do I create a html version of the man page?
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-----------------------------------------------
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The man pages was more or less designed for groff as it is the main tool for
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it. Therefore only groff produces acceptable results without changes.
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Additionaly, the SS variable was set to 4 instead of 18 (looks nice with man)
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to produce a better groff html output. Here's an overview again:
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- groff: groff -Thtml -m man mplayer.1 > manpage.groff.html
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- man2html: You can view it over your cgi script:
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http://localhost/cgi-bin/man2html?mplayer
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The output is unuseable as the script doesn't seem to
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support the macro definitions. Maybe a manual change of all
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leads to acceptable results.
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- rman: rman -f html mplayer.1 > manpage.rman.html
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The output is ugly, you need to remove the .PDs from the
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macro definitions to produce at least acceptable results.
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The structure
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-------------
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The options are divided into the the layer they belong to. The only exception
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is the OSD/SUB section. Inside the section they're alphabetically ordered.
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(Header)
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Not visible, copyright and author informations.
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(Macro definitions)
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Not visible, some macro defintions.
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NAME
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The manpage is used for both: mplayer and mencoder.
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SYNOPSIS
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A description of MPlayer's playtree.
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DESCRIPTION
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A general description of MPlayer, MEncoder, GMPlayer and its features.
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GENERAL NOTES
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Some general notes about the options and a description of the config file
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format.
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PLAYER OPTIONS (MPLAYER ONLY)
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Option descriptions about the user interface (mplayer only).
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DEMUXER/STREAM OPTIONS
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Option descriptions about the demuxer and stream layer.
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OSD/SUB OPTIONS
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This section is special: It contains all description about subtitles and
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OSD. It is independent of the usual layer separation and was created
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because of its size. The options may therefore come from any layer.
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AUDIO OUTPUT OPTIONS (MPLAYER ONLY)
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Option descriptions about the audio output layer (ao) (mplayer only).
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VIDEO OUTPUT OPTIONS (MPLAYER ONLY)
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Option descriptions about the video output layer (vo) (mplayer only).
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DECODING/FILTERING OPTIONS
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Options about the decoding and filter layer (ad,vd,vf,pl).
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ENCODING OPTIONS (MENCODER ONLY)
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Encoding option descriptions (ve) (mencoder only).
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KEYBOARD CONTROL
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A description of MPlayer's input system and the default keyboard controls.
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SLAVE MODE PROTOCOL
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A description about the slave mode protocol (-slave).
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FILES
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A list and description of all installed/used files/directories.
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EXAMPLES
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Basic examples. Again: no long descriptions/processes.
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BUGS
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AUTHORS
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STANDARD DISCLAIMER
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The man page/groff format
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-------------------------
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Just read this and rtfs:
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http://www.tldp.org/HOWTO/mini/Man-Page.html
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man 7 man
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man 7 groff
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Directives for the internal "style"
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-----------------------------------
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It was kept simple but there are still certain directives/rules to get a
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uniform man page. The best way is to read (and understand) the source.
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General:
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- No line should contain more than 79 characters
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- Used commands: .TH, .SH, .TP, .IP, .[R]B, .I, .br, .RS, .RE, macro
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definitions, comments
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- Don't forget the quotation marks around expressions or the backslash
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before a '-' if it's needed.
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Separations:
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- Sections (.SH) 2 newlines before (3 visible because of .SH)
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- Options not (it's done automatically over .TP)
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- Sub options not (it's done automatically over .IP)
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should be be separated over a comment (.) at the
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beginning and the end to make the man page readable ;)
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- Examples 1 newline before
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- Big parts better use .P (paragraph) or .br (equal to html's <BR>)
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instead of newlines
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- In general no newlines
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never more than 2 spaces between anything
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Option description:
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- Option and/or suboption parameters should be short and descriptive.
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- If the option is between a certain range, it should be specified at the
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beginning (eg. <0\-100> or <\-100 \- 100>)
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- All optional things are but between angular paranthesis ([])
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- Obsolete options are followed by (OBSOLETE), beta options by
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(BETA CODE), etc
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- MPlayer only options in a section which isn't marked this way
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are followed by (MPLAYER only)
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- Add hints to other options if they belong to each other
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eg. (\-vo zr only) or (see \-alang option too)
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- If a non trivial default parameter exist, write it down
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eg. (default: 24)
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- Options inside a section are all alphabetically ordered
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- Examples and notes at the end
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Macro definitions (see beginning of man page):
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- SS SS is the starting value of the suboption column
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- .IPs Add new suboption (we use .TP for normal options and .IP for
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the rest)
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- .RSs Begin of suboptions, end with .RE
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- .RSss Begin of suboptions in a suboption
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- .REss End of suboptions in a suboption
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Options, sub options, examples structure:
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- Normal options (note the '<' and '>'):
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[...]
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.TP
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.B \-option <parameters>
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description
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[...]
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- Sub options:
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[...]
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description. Available options are:
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.
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.RSs
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.IPs "subopt1=<value>"
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description1
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.IPs "subopt2=<value>"
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description2
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[...]
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.IPs "last subopt=<value>"
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last description
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.RE
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.
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[...]
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- Sub options in sub options:
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[...]
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.IPs "subopt1=<value>"
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description1
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.RSss
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subsubopt1: description1
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.br
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subsubopt2: description2
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[...]
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.REss
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[...]
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- Examples (like sub options, note: no '.', newline before and ':' after
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.I EXAMPLE, .PD 0 before and .PD 1 after the examples):
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[...]
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.I EXAMPLE:
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.PD 0
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.RSs
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.IP "-option used parameters"
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description
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[...]
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.RE
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.PD 1
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[...]
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