doc: use @command{} for commands.

doc/encoders.texi

@@ -577,7 +577,7 @@ Allow to set any x264 option, see x264 --fullhelp for a list.
 ":".
 @end table
 
-For example to specify libx264 encoding options with @file{ffmpeg}:
+For example to specify libx264 encoding options with @command{ffmpeg}:
 @example
 ffmpeg -i foo.mpg -vcodec libx264 -x264opts keyint=123:min-keyint=20 -an out.mkv
 @end example

doc/ffprobe.texi

@@ -135,7 +135,7 @@ Read @var{input_file}.
 @chapter Writers
 @c man begin WRITERS
 
-A writer defines the output format adopted by @file{ffprobe}, and will be
+A writer defines the output format adopted by @command{ffprobe}, and will be
 used for printing all the parts of the output.
 
 A writer may accept one or more arguments, which specify the options to

doc/filters.texi

@@ -354,7 +354,7 @@ A customized down-mix to stereo that works automatically for 3-, 4-, 5- and
 pan=stereo: FL < FL + 0.5*FC + 0.6*BL + 0.6*SL : FR < FR + 0.5*FC + 0.6*BR + 0.6*SR
 @end example
 
-Note that @file{ffmpeg} integrates a default down-mix (and up-mix) system
+Note that @command{ffmpeg} integrates a default down-mix (and up-mix) system
 that should be preferred (see "-ac" option) unless you have very specific
 needs.
 

doc/indevs.texi

@@ -196,12 +196,12 @@ device.
 Once you have created one or more JACK readable clients, you need to
 connect them to one or more JACK writable clients.
 
-To connect or disconnect JACK clients you can use the
-@file{jack_connect} and @file{jack_disconnect} programs, or do it
-through a graphical interface, for example with @file{qjackctl}.
+To connect or disconnect JACK clients you can use the @command{jack_connect}
+and @command{jack_disconnect} programs, or do it through a graphical interface,
+for example with @command{qjackctl}.
 
 To list the JACK clients and their properties you can invoke the command
-@file{jack_lsp}.
+@command{jack_lsp}.
 
 Follows an example which shows how to capture a JACK readable client
 with @command{ffmpeg}.
@@ -260,7 +260,7 @@ device.
 
 @itemize
 @item
-Create a color video stream and play it back with @file{ffplay}:
+Create a color video stream and play it back with @command{ffplay}:
 @example
 ffplay -f lavfi -graph "color=pink [out0]" dummy
 @end example
@@ -280,14 +280,14 @@ ffplay -f lavfi -graph "testsrc [out0]; testsrc,hflip [out1]; testsrc,negate [ou
 
 @item
 Read an audio stream from a file using the amovie source and play it
-back with @file{ffplay}:
+back with @command{ffplay}:
 @example
 ffplay -f lavfi "amovie=test.wav"
 @end example
 
 @item
 Read an audio stream and a video stream and play it back with
-@file{ffplay}:
+@command{ffplay}:
 @example
 ffplay -f lavfi "movie=test.avi[out0];amovie=test.wav[out1]"
 @end example
@@ -380,7 +380,7 @@ $ ffmpeg -f openal -i '' out.ogg
 @end example
 
 Capture from two devices simultaneously, writing to two different files,
-within the same @file{ffmpeg} command:
+within the same @command{ffmpeg} command:
 @example
 $ ffmpeg -f openal -i 'DR-BT101 via PulseAudio' out1.ogg -f openal -i 'ALSA Default' out2.ogg
 @end example
@@ -415,7 +415,7 @@ The filename to provide to the input device is a source device or the
 string "default"
 
 To list the pulse source devices and their properties you can invoke
-the command @file{pactl list sources}.
+the command @command{pactl list sources}.
 
 @example
 ffmpeg -f pulse -i default /tmp/pulse.wav
@@ -516,8 +516,8 @@ the device.
 
 Video4Linux and Video4Linux2 devices only support a limited set of
 @var{width}x@var{height} sizes and frame rates. You can check which are
-supported for example with the command @file{dov4l} for Video4Linux
-devices and the command @file{v4l-info} for Video4Linux2 devices.
+supported for example with the command @command{dov4l} for Video4Linux
+devices and the command @command{v4l-info} for Video4Linux2 devices.
 
 If the size for the device is set to 0x0, the input device will
 try to auto-detect the size to use.
@@ -579,7 +579,7 @@ default to 0.
 
 Check the X11 documentation (e.g. man X) for more detailed information.
 
-Use the @file{dpyinfo} program for getting basic information about the
+Use the @command{dpyinfo} program for getting basic information about the
 properties of your X11 display (e.g. grep for "name" or "dimensions").
 
 For example to grab from @file{:0.0} using @command{ffmpeg}:

doc/libavfilter.texi

@@ -43,13 +43,13 @@ The result will be that in output the top half of the video is mirrored
 onto the bottom half.
 
 Video filters are loaded using the @var{-vf} option passed to
-ffmpeg or to ffplay. Filters in the same linear chain are separated by
-commas. In our example, @var{split, fifo, overlay} are in one linear
-chain, and @var{fifo, crop, vflip} are in another. The points where
-the linear chains join are labeled by names enclosed in square
-brackets. In our example, that is @var{[T1]} and @var{[T2]}. The magic
-labels @var{[in]} and @var{[out]} are the points where video is input
-and output.
+@command{ffmpeg} or to @command{ffplay}. Filters in the same linear
+chain are separated by commas. In our example, @var{split, fifo,
+overlay} are in one linear chain, and @var{fifo, crop, vflip} are in
+another. The points where the linear chains join are labeled by names
+enclosed in square brackets. In our example, that is @var{[T1]} and
+@var{[T2]}. The magic labels @var{[in]} and @var{[out]} are the points
+where video is input and output.
 
 Some filters take in input a list of parameters: they are specified
 after the filter name and an equal sign, and are separated each other

doc/outdevs.texi

@@ -60,7 +60,7 @@ If not specified it defaults to the size of the input video.
 
 @subsection Examples
 
-The following command shows the @file{ffmpeg} output is an
+The following command shows the @command{ffmpeg} output is an
 SDL window, forcing its size to the qcif format:
 @example
 ffmpeg -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "SDL output"

doc/protocols.texi

@@ -52,7 +52,7 @@ resource to be concatenated, each one possibly specifying a distinct
 protocol.
 
 For example to read a sequence of files @file{split1.mpeg},
-@file{split2.mpeg}, @file{split3.mpeg} with @file{ffplay} use the
+@file{split2.mpeg}, @file{split3.mpeg} with @command{ffplay} use the
 command:
 @example
 ffplay concat:split1.mpeg\|split2.mpeg\|split3.mpeg
@@ -183,7 +183,7 @@ application specified in @var{app}, may be prefixed by "mp4:".
 
 @end table
 
-For example to read with @file{ffplay} a multimedia resource named
+For example to read with @command{ffplay} a multimedia resource named
 "sample" from the application "vod" from an RTMP server "myserver":
 @example
 ffplay rtmp://myserver/vod/sample
@@ -224,7 +224,7 @@ For example, to stream a file in real-time to an RTMP server using
 ffmpeg -re -i myfile -f flv rtmp://myserver/live/mystream
 @end example
 
-To play the same stream using @file{ffplay}:
+To play the same stream using @command{ffplay}:
 @example
 ffplay "rtmp://myserver/live/mystream live=1"
 @end example
@@ -249,7 +249,7 @@ The required syntax for a RTSP url is:
 rtsp://@var{hostname}[:@var{port}]/@var{path}
 @end example
 
-The following options (set on the @command{ffmpeg}/@file{ffplay} command
+The following options (set on the @command{ffmpeg}/@command{ffplay} command
 line, or set in code via @code{AVOption}s or in @code{avformat_open_input}),
 are supported:
 
@@ -288,7 +288,7 @@ When receiving data over UDP, the demuxer tries to reorder received packets
 order for this to be enabled, a maximum delay must be specified in the
 @code{max_delay} field of AVFormatContext.
 
-When watching multi-bitrate Real-RTSP streams with @file{ffplay}, the
+When watching multi-bitrate Real-RTSP streams with @command{ffplay}, the
 streams to display can be chosen with @code{-vst} @var{n} and
 @code{-ast} @var{n} for video and audio respectively, and can be switched
 on the fly by pressing @code{v} and @code{a}.
@@ -365,13 +365,13 @@ To broadcast a stream on the local subnet, for watching in VLC:
 ffmpeg -re -i @var{input} -f sap sap://224.0.0.255?same_port=1
 @end example
 
-Similarly, for watching in ffplay:
+Similarly, for watching in @command{ffplay}:
 
 @example
 ffmpeg -re -i @var{input} -f sap sap://224.0.0.255
 @end example
 
-And for watching in ffplay, over IPv6:
+And for watching in @command{ffplay}, over IPv6:
 
 @example
 ffmpeg -re -i @var{input} -f sap sap://[ff0e::1:2:3:4]