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doc: merge syntax.texi, eval.texi and opencl.texi into utils.texi
This commit is contained in:
Stefano Sabatini
parent
b59aa00707
commit
949c8627b6
@ -1,9 +1,7 @@
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@include config.texi
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@ifset config-avutil
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@include syntax.texi
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@include eval.texi
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@include opencl.texi
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@include utils.texi
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@end ifset
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@ifset config-avcodec
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@ -17,9 +17,7 @@ by the libavutil library.
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@c man end DESCRIPTION
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@include syntax.texi
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@include eval.texi
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@include opencl.texi
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@include utils.texi
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@chapter See Also
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@ -1,22 +0,0 @@
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@chapter OpenCL Options
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@c man begin OPENCL OPTIONS
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When FFmpeg is configured with @code{--enable-opencl}, it is possible
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to set the options to set in the global OpenCL context. The list of
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supported options follows:
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@table @option
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@item build_options
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Set build options which used to compiled kernels, see reference "OpenCL Specification Version: 1.2 chapter 5.6.4"
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@item platform_idx
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Select platform to run OpenCL code, the platform_idx is the index of platform
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in the device list which can be obtained with av_opencl_get_device_list().
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@item device_idx
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Select device to run OpenCL code, the device_idx is the index of device in
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the device list which can be obtained with av_opencl_get_device_list().
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@end table
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@c man end OPENCL OPTIONS
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258
doc/syntax.texi
258
doc/syntax.texi
@ -1,258 +0,0 @@
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@chapter Syntax
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@c man begin SYNTAX
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This section documents the syntax and formats employed by the FFmpeg
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libraries and tools.
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@anchor{quoting_and_escaping}
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@section Quoting and escaping
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FFmpeg adopts the following quoting and escaping mechanism, unless
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explicitly specified. The following rules are applied:
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@itemize
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@item
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@code{'} and @code{\} are special characters (respectively used for
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quoting and escaping). In addition to them, there might be other
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special characters depending on the specific syntax where the escaping
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and quoting are employed.
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@item
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A special character is escaped by prefixing it with a '\'.
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@item
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All characters enclosed between '' are included literally in the
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parsed string. The quote character @code{'} itself cannot be quoted,
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so you may need to close the quote and escape it.
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@item
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Leading and trailing whitespaces, unless escaped or quoted, are
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removed from the parsed string.
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@end itemize
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Note that you may need to add a second level of escaping when using
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the command line or a script, which depends on the syntax of the
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adopted shell language.
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The function @code{av_get_token} defined in
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@file{libavutil/avstring.h} can be used to parse a token quoted or
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escaped according to the rules defined above.
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The tool @file{tools/ffescape} in the FFmpeg source tree can be used
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to automatically quote or escape a string in a script.
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@subsection Examples
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@itemize
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@item
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Escape the string @code{Crime d'Amour} containing the @code{'} special
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character:
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@example
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Crime d\'Amour
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@end example
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@item
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The string above contains a quote, so the @code{'} needs to be escaped
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when quoting it:
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@example
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'Crime d'\''Amour'
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@end example
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@item
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Include leading or trailing whitespaces using quoting:
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@example
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' this string starts and ends with whitespaces '
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@end example
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@item
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Escaping and quoting can be mixed together:
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@example
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' The string '\'string\'' is a string '
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@end example
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@item
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To include a literal @code{\} you can use either escaping or quoting:
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@example
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'c:\foo' can be written as c:\\foo
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@end example
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@end itemize
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@anchor{date syntax}
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@section Date
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The accepted syntax is:
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@example
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[(YYYY-MM-DD|YYYYMMDD)[T|t| ]]((HH:MM:SS[.m...]]])|(HHMMSS[.m...]]]))[Z]
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now
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@end example
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If the value is "now" it takes the current time.
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Time is local time unless Z is appended, in which case it is
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interpreted as UTC.
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If the year-month-day part is not specified it takes the current
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year-month-day.
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@anchor{time duration syntax}
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@section Time duration
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The accepted syntax is:
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@example
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[-][HH:]MM:SS[.m...]
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[-]S+[.m...]
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@end example
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@var{HH} expresses the number of hours, @var{MM} the number a of minutes
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and @var{SS} the number of seconds.
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@anchor{video size syntax}
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@section Video size
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Specify the size of the sourced video, it may be a string of the form
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@var{width}x@var{height}, or the name of a size abbreviation.
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The following abbreviations are recognized:
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@table @samp
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@item ntsc
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720x480
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@item pal
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720x576
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@item qntsc
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352x240
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@item qpal
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352x288
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@item sntsc
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640x480
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@item spal
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768x576
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@item film
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352x240
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@item ntsc-film
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352x240
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@item sqcif
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128x96
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@item qcif
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176x144
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@item cif
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352x288
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@item 4cif
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704x576
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@item 16cif
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1408x1152
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@item qqvga
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160x120
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@item qvga
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320x240
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@item vga
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640x480
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@item svga
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800x600
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@item xga
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1024x768
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@item uxga
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1600x1200
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@item qxga
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2048x1536
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@item sxga
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1280x1024
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@item qsxga
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2560x2048
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@item hsxga
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5120x4096
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@item wvga
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852x480
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@item wxga
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1366x768
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@item wsxga
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1600x1024
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@item wuxga
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1920x1200
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@item woxga
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2560x1600
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@item wqsxga
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3200x2048
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@item wquxga
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3840x2400
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@item whsxga
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6400x4096
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@item whuxga
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7680x4800
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@item cga
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320x200
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@item ega
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640x350
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@item hd480
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852x480
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@item hd720
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1280x720
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@item hd1080
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1920x1080
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@item 2k
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2048x1080
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@item 2kflat
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1998x1080
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@item 2kscope
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2048x858
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@item 4k
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4096x2160
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@item 4kflat
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3996x2160
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@item 4kscope
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4096x1716
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@end table
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@anchor{video rate syntax}
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@section Video rate
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Specify the frame rate of a video, expressed as the number of frames
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generated per second. It has to be a string in the format
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@var{frame_rate_num}/@var{frame_rate_den}, an integer number, a float
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number or a valid video frame rate abbreviation.
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The following abbreviations are recognized:
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@table @samp
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@item ntsc
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30000/1001
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@item pal
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25/1
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@item qntsc
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30000/1001
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@item qpal
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25/1
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@item sntsc
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30000/1001
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@item spal
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25/1
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@item film
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24/1
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@item ntsc-film
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24000/1001
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@end table
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@anchor{ratio syntax}
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@section Ratio
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A ratio can be expressed as an expression, or in the form
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@var{numerator}:@var{denominator}.
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|
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Note that a ratio with infinite (1/0) or negative value is
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considered valid, so you should check on the returned value if you
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want to exclude those values.
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The undefined value can be expressed using the "0:0" string.
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@anchor{color syntax}
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@section Color
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It can be the name of a color (case insensitive match) or a
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[0x|#]RRGGBB[AA] sequence, possibly followed by "@@" and a string
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representing the alpha component.
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The alpha component may be a string composed by "0x" followed by an
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hexadecimal number or a decimal number between 0.0 and 1.0, which
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represents the opacity value (0x00/0.0 means completely transparent,
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0xff/1.0 completely opaque).
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If the alpha component is not specified then 0xff is assumed.
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The string "random" will result in a random color.
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@c man end SYNTAX
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@ -1,3 +1,262 @@
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@chapter Syntax
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@c man begin SYNTAX
|
||||
|
||||
This section documents the syntax and formats employed by the FFmpeg
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libraries and tools.
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@anchor{quoting_and_escaping}
|
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@section Quoting and escaping
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||||
|
||||
FFmpeg adopts the following quoting and escaping mechanism, unless
|
||||
explicitly specified. The following rules are applied:
|
||||
|
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@itemize
|
||||
@item
|
||||
@code{'} and @code{\} are special characters (respectively used for
|
||||
quoting and escaping). In addition to them, there might be other
|
||||
special characters depending on the specific syntax where the escaping
|
||||
and quoting are employed.
|
||||
|
||||
@item
|
||||
A special character is escaped by prefixing it with a '\'.
|
||||
|
||||
@item
|
||||
All characters enclosed between '' are included literally in the
|
||||
parsed string. The quote character @code{'} itself cannot be quoted,
|
||||
so you may need to close the quote and escape it.
|
||||
|
||||
@item
|
||||
Leading and trailing whitespaces, unless escaped or quoted, are
|
||||
removed from the parsed string.
|
||||
@end itemize
|
||||
|
||||
Note that you may need to add a second level of escaping when using
|
||||
the command line or a script, which depends on the syntax of the
|
||||
adopted shell language.
|
||||
|
||||
The function @code{av_get_token} defined in
|
||||
@file{libavutil/avstring.h} can be used to parse a token quoted or
|
||||
escaped according to the rules defined above.
|
||||
|
||||
The tool @file{tools/ffescape} in the FFmpeg source tree can be used
|
||||
to automatically quote or escape a string in a script.
|
||||
|
||||
@subsection Examples
|
||||
|
||||
@itemize
|
||||
@item
|
||||
Escape the string @code{Crime d'Amour} containing the @code{'} special
|
||||
character:
|
||||
@example
|
||||
Crime d\'Amour
|
||||
@end example
|
||||
|
||||
@item
|
||||
The string above contains a quote, so the @code{'} needs to be escaped
|
||||
when quoting it:
|
||||
@example
|
||||
'Crime d'\''Amour'
|
||||
@end example
|
||||
|
||||
@item
|
||||
Include leading or trailing whitespaces using quoting:
|
||||
@example
|
||||
' this string starts and ends with whitespaces '
|
||||
@end example
|
||||
|
||||
@item
|
||||
Escaping and quoting can be mixed together:
|
||||
@example
|
||||
' The string '\'string\'' is a string '
|
||||
@end example
|
||||
|
||||
@item
|
||||
To include a literal @code{\} you can use either escaping or quoting:
|
||||
@example
|
||||
'c:\foo' can be written as c:\\foo
|
||||
@end example
|
||||
@end itemize
|
||||
|
||||
@anchor{date syntax}
|
||||
@section Date
|
||||
|
||||
The accepted syntax is:
|
||||
@example
|
||||
[(YYYY-MM-DD|YYYYMMDD)[T|t| ]]((HH:MM:SS[.m...]]])|(HHMMSS[.m...]]]))[Z]
|
||||
now
|
||||
@end example
|
||||
|
||||
If the value is "now" it takes the current time.
|
||||
|
||||
Time is local time unless Z is appended, in which case it is
|
||||
interpreted as UTC.
|
||||
If the year-month-day part is not specified it takes the current
|
||||
year-month-day.
|
||||
|
||||
@anchor{time duration syntax}
|
||||
@section Time duration
|
||||
|
||||
The accepted syntax is:
|
||||
@example
|
||||
[-][HH:]MM:SS[.m...]
|
||||
[-]S+[.m...]
|
||||
@end example
|
||||
|
||||
@var{HH} expresses the number of hours, @var{MM} the number a of minutes
|
||||
and @var{SS} the number of seconds.
|
||||
|
||||
@anchor{video size syntax}
|
||||
@section Video size
|
||||
Specify the size of the sourced video, it may be a string of the form
|
||||
@var{width}x@var{height}, or the name of a size abbreviation.
|
||||
|
||||
The following abbreviations are recognized:
|
||||
@table @samp
|
||||
@item ntsc
|
||||
720x480
|
||||
@item pal
|
||||
720x576
|
||||
@item qntsc
|
||||
352x240
|
||||
@item qpal
|
||||
352x288
|
||||
@item sntsc
|
||||
640x480
|
||||
@item spal
|
||||
768x576
|
||||
@item film
|
||||
352x240
|
||||
@item ntsc-film
|
||||
352x240
|
||||
@item sqcif
|
||||
128x96
|
||||
@item qcif
|
||||
176x144
|
||||
@item cif
|
||||
352x288
|
||||
@item 4cif
|
||||
704x576
|
||||
@item 16cif
|
||||
1408x1152
|
||||
@item qqvga
|
||||
160x120
|
||||
@item qvga
|
||||
320x240
|
||||
@item vga
|
||||
640x480
|
||||
@item svga
|
||||
800x600
|
||||
@item xga
|
||||
1024x768
|
||||
@item uxga
|
||||
1600x1200
|
||||
@item qxga
|
||||
2048x1536
|
||||
@item sxga
|
||||
1280x1024
|
||||
@item qsxga
|
||||
2560x2048
|
||||
@item hsxga
|
||||
5120x4096
|
||||
@item wvga
|
||||
852x480
|
||||
@item wxga
|
||||
1366x768
|
||||
@item wsxga
|
||||
1600x1024
|
||||
@item wuxga
|
||||
1920x1200
|
||||
@item woxga
|
||||
2560x1600
|
||||
@item wqsxga
|
||||
3200x2048
|
||||
@item wquxga
|
||||
3840x2400
|
||||
@item whsxga
|
||||
6400x4096
|
||||
@item whuxga
|
||||
7680x4800
|
||||
@item cga
|
||||
320x200
|
||||
@item ega
|
||||
640x350
|
||||
@item hd480
|
||||
852x480
|
||||
@item hd720
|
||||
1280x720
|
||||
@item hd1080
|
||||
1920x1080
|
||||
@item 2k
|
||||
2048x1080
|
||||
@item 2kflat
|
||||
1998x1080
|
||||
@item 2kscope
|
||||
2048x858
|
||||
@item 4k
|
||||
4096x2160
|
||||
@item 4kflat
|
||||
3996x2160
|
||||
@item 4kscope
|
||||
4096x1716
|
||||
@end table
|
||||
|
||||
@anchor{video rate syntax}
|
||||
@section Video rate
|
||||
|
||||
Specify the frame rate of a video, expressed as the number of frames
|
||||
generated per second. It has to be a string in the format
|
||||
@var{frame_rate_num}/@var{frame_rate_den}, an integer number, a float
|
||||
number or a valid video frame rate abbreviation.
|
||||
|
||||
The following abbreviations are recognized:
|
||||
@table @samp
|
||||
@item ntsc
|
||||
30000/1001
|
||||
@item pal
|
||||
25/1
|
||||
@item qntsc
|
||||
30000/1001
|
||||
@item qpal
|
||||
25/1
|
||||
@item sntsc
|
||||
30000/1001
|
||||
@item spal
|
||||
25/1
|
||||
@item film
|
||||
24/1
|
||||
@item ntsc-film
|
||||
24000/1001
|
||||
@end table
|
||||
|
||||
@anchor{ratio syntax}
|
||||
@section Ratio
|
||||
|
||||
A ratio can be expressed as an expression, or in the form
|
||||
@var{numerator}:@var{denominator}.
|
||||
|
||||
Note that a ratio with infinite (1/0) or negative value is
|
||||
considered valid, so you should check on the returned value if you
|
||||
want to exclude those values.
|
||||
|
||||
The undefined value can be expressed using the "0:0" string.
|
||||
|
||||
@anchor{color syntax}
|
||||
@section Color
|
||||
|
||||
It can be the name of a color (case insensitive match) or a
|
||||
[0x|#]RRGGBB[AA] sequence, possibly followed by "@@" and a string
|
||||
representing the alpha component.
|
||||
|
||||
The alpha component may be a string composed by "0x" followed by an
|
||||
hexadecimal number or a decimal number between 0.0 and 1.0, which
|
||||
represents the opacity value (0x00/0.0 means completely transparent,
|
||||
0xff/1.0 completely opaque).
|
||||
If the alpha component is not specified then 0xff is assumed.
|
||||
|
||||
The string "random" will result in a random color.
|
||||
|
||||
@c man end SYNTAX
|
||||
|
||||
@chapter Expression Evaluation
|
||||
@c man begin EXPRESSION EVALUATION
|
||||
|
||||
@ -301,3 +560,26 @@ indication of the corresponding powers of 10 and of 2.
|
||||
@end table
|
||||
|
||||
@c man end
|
||||
|
||||
@chapter OpenCL Options
|
||||
@c man begin OPENCL OPTIONS
|
||||
|
||||
When FFmpeg is configured with @code{--enable-opencl}, it is possible
|
||||
to set the options to set in the global OpenCL context. The list of
|
||||
supported options follows:
|
||||
|
||||
@table @option
|
||||
@item build_options
|
||||
Set build options which used to compiled kernels, see reference "OpenCL Specification Version: 1.2 chapter 5.6.4"
|
||||
|
||||
@item platform_idx
|
||||
Select platform to run OpenCL code, the platform_idx is the index of platform
|
||||
in the device list which can be obtained with av_opencl_get_device_list().
|
||||
|
||||
@item device_idx
|
||||
Select device to run OpenCL code, the device_idx is the index of device in
|
||||
the device list which can be obtained with av_opencl_get_device_list().
|
||||
|
||||
@end table
|
||||
|
||||
@c man end OPENCL OPTIONS
|
||||
Loading…
Reference in New Issue
Block a user