docs: Spelling fixes to 9 texi files from /doc

credits to: Violet Lin (from Google Code-in)

Signed-off-by: burek <burek021@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/eval.texi

@@ -1,7 +1,7 @@
 @chapter Expression Evaluation
 @c man begin EXPRESSION EVALUATION
 
-When evaluating an arithemetic expression, FFmpeg uses an internal
+When evaluating an arithmetic expression, FFmpeg uses an internal
 formula evaluator, implemented through the @file{libavutil/eval.h}
 interface.
 
@@ -53,7 +53,7 @@ returns the value stored in the internal variable.
 
 @item ld(var)
 Allow to load the value of the internal variable with number
-@var{var}, which was previosly stored with st(@var{var}, @var{expr}).
+@var{var}, which was previously stored with st(@var{var}, @var{expr}).
 The function returns the loaded value.
 
 @item while(cond, expr)
@@ -102,11 +102,11 @@ Return the greatest common divisor of @var{x} and @var{y}. If both @var{x} and
 The following constants are available:
 @table @option
 @item PI
-area of the unit disc, approximatively 3.14
+area of the unit disc, approximately 3.14
 @item E
-exp(1) (Euler's number), approximatively 2.718
+exp(1) (Euler's number), approximately 2.718
 @item PHI
-golden ratio (1+sqrt(5))/2, approximatively 1.618
+golden ratio (1+sqrt(5))/2, approximately 1.618
 @end table
 
 Note that:

doc/ffmpeg.texi

@@ -102,7 +102,7 @@ Do not overwrite output files but exit if file exists.
 Select an encoder (when used before an output file) or a decoder (when used
 before an input file) for one or more streams. @var{codec} is the name of a
 decoder/encoder or a special value @code{copy} (output only) to indicate that
-the stream is not to be reencoded.
+the stream is not to be re-encoded.
 
 For example
 @example
@@ -449,7 +449,7 @@ and the following constants are available:
 @end table
 
 @item -rc_override[:@var{stream_specifier}] @var{override} (@emph{output,per-stream})
-Rate control override for specific intervals, formated as "int,int,int"
+Rate control override for specific intervals, formatted as "int,int,int"
 list separated with slashes. Two first values are the beginning and
 end frame numbers, last one is quantizer to use if positive, or quality
 factor if negative.

doc/filters.texi

@@ -439,7 +439,7 @@ aevalsrc=0
 
 @item
 
-Generate a sin signal with frequence of 440 Hz, set sample rate to
+Generate a sin signal with frequency of 440 Hz, set sample rate to
 8000 Hz:
 @example
 aevalsrc="sin(440*2*PI*t)::s=8000"
@@ -628,7 +628,7 @@ input plane. They are expressions, and can contain the following
 constants:
 @table @option
 @item w, h
-the input width and heigth in pixels
+the input width and height in pixels
 
 @item cw, ch
 the input chroma image width and height in pixels
@@ -1089,7 +1089,7 @@ following constants:
 
 @table @option
 @item w, h
-the input width and heigth
+the input width and height
 
 @item tw, text_w
 the width of the rendered text
@@ -1491,7 +1491,7 @@ The expressions can contain the following constants and functions:
 
 @table @option
 @item w, h
-the input width and heigth
+the input width and height
 
 @item val
 input value for the pixel component
@@ -1688,7 +1688,7 @@ The filter takes the parameters: @var{filter_name}@{:=@}@var{filter_params}.
 filter. If not specified the default values are assumed.
 
 Refer to the official libopencv documentation for more precise
-informations:
+information:
 @url{http://opencv.willowgarage.com/documentation/c/image_filtering.html}
 
 Follows the list of supported libopencv filters.
@@ -1704,7 +1704,7 @@ It accepts the parameters: @var{struct_el}:@var{nb_iterations}.
 @var{struct_el} represents a structuring element, and has the syntax:
 @var{cols}x@var{rows}+@var{anchor_x}x@var{anchor_y}/@var{shape}
 
-@var{cols} and @var{rows} represent the number of colums and rows of
+@var{cols} and @var{rows} represent the number of columns and rows of
 the structuring element, @var{anchor_x} and @var{anchor_y} the anchor
 point, and @var{shape} the shape for the structuring element, and
 can be one of the values "rect", "cross", "ellipse", "custom".
@@ -2317,7 +2317,7 @@ seconds
 
 @item pos
 position of the frame in the input stream, -1 if this information in
-unavailable and/or meanigless (for example in case of synthetic video)
+unavailable and/or meaningless (for example in case of synthetic video)
 
 @item fmt
 pixel format name
@@ -2792,7 +2792,7 @@ separated by ":". The description of the accepted options follows.
 
 @item size, s
 Specify the size of the sourced video, it may be a string of the form
-@var{width}x@var{heigth}, or the name of a size abbreviation. The
+@var{width}x@var{height}, or the name of a size abbreviation. The
 default value is "320x240".
 
 @item rate, r

doc/indevs.texi

@@ -250,7 +250,7 @@ labelled by a unique string of the form "out@var{N}", where @var{N} is a
 number starting from 0 corresponding to the mapped input stream
 generated by the device.
 The first unlabelled output is automatically assigned to the "out0"
-label, but all the others need to be specified explicitely.
+label, but all the others need to be specified explicitly.
 
 If not specified defaults to the filename specified for the input
 device.
@@ -520,7 +520,7 @@ supported for example with the command @file{dov4l} for Video4Linux
 devices and the command @file{v4l-info} for Video4Linux2 devices.
 
 If the size for the device is set to 0x0, the input device will
-try to autodetect the size to use.
+try to auto-detect the size to use.
 Only for the video4linux2 device, if the frame rate is set to 0/0 the
 input device will use the frame rate value already set in the driver.
 
@@ -537,10 +537,10 @@ tools.
 # to the default of 25/1.
 ffplay -s 320x240 -f video4linux /dev/video0
 
-# Grab and show the input of a video4linux2 device, autoadjust size.
+# Grab and show the input of a video4linux2 device, auto-adjust size.
 ffplay -f video4linux2 /dev/video0
 
-# Grab and record the input of a video4linux2 device, autoadjust size,
+# Grab and record the input of a video4linux2 device, auto-adjust size,
 # frame rate value defaults to 0/0 so it is read from the video4linux2
 # driver.
 ffmpeg -f video4linux2 -i /dev/video0 out.mpeg
@@ -570,7 +570,7 @@ The filename passed as input has the syntax:
 
 @var{hostname}:@var{display_number}.@var{screen_number} specifies the
 X11 display name of the screen to grab from. @var{hostname} can be
-ommitted, and defaults to "localhost". The environment variable
+omitted, and defaults to "localhost". The environment variable
 @env{DISPLAY} contains the default display name.
 
 @var{x_offset} and @var{y_offset} specify the offsets of the grabbed

doc/outdevs.texi

@@ -28,7 +28,7 @@ OSS (Open Sound System) output device.
 
 @section sdl
 
-SDL (Simple Directmedia Layer) output device.
+SDL (Simple DirectMedia Layer) output device.
 
 This output devices allows to show a video stream in an SDL
 window. Only one SDL window is allowed per application, so you can

doc/protocols.texi

@@ -155,8 +155,8 @@ be seekable, so they will fail with the pipe output protocol.
 
 Real-Time Messaging Protocol.
 
-The Real-Time Messaging Protocol (RTMP) is used for streaming multime‐
-dia content across a TCP/IP network.
+The Real-Time Messaging Protocol (RTMP) is used for streaming
+multimedia content across a TCP/IP network.
 
 The required syntax is:
 @example
@@ -195,7 +195,7 @@ Real-Time Messaging Protocol and its variants supported through
 librtmp.
 
 Requires the presence of the librtmp headers and library during
-configuration. You need to explicitely configure the build with
+configuration. You need to explicitly configure the build with
 "--enable-librtmp". If enabled this will replace the native RTMP
 protocol.