@@ -5,8 +5,8 @@ Input devices are configured elements in FFmpeg which allow to access

 the data coming from a multimedia device attached to your system.

 When you configure your FFmpeg build, all the supported input devices

-are enabled by default. You can list them using the configure option

-"--list-indevs".

+are enabled by default. You can list all available ones using the

+configure option "--list-indevs".

 You can disable all the input devices using the configure option

 "--disable-indevs", and selectively enable an input device using the

@@ -25,7 +25,7 @@ ALSA (Advanced Linux Sound Architecture) input device.

 To enable this input device during configuration you need libasound

 installed on your system.

-This device allows to capture from an ALSA device. The name of the

+This device allows capturing from an ALSA device. The name of the

 device to capture has to be an ALSA card identifier.

 An ALSA identifier has the syntax:

@@ -42,7 +42,7 @@ specify card number or identifier, device number and subdevice number

 To see the list of cards currently recognized by your system check the

 files @file{/proc/asound/cards} and @file{/proc/asound/devices}.

-For example to capture with @file{ffmpeg} from an alsa device with

+For example to capture with @file{ffmpeg} from an ALSA device with

 card id 0, you may run the command:

 @example

 ffmpeg -f alsa -i hw:0 alsaout.wav

@@ -65,38 +65,38 @@ Linux DV 1394 input device.

 @section jack

-Jack input device.

+JACK input device.

 To enable this input device during configuration you need libjack

 installed on your system.

-A jack input device creates one or more jack writable clients, one for

+A JACK input device creates one or more JACK writable clients, one for

 each audio channel, with name @var{client_name}:input_@var{N}, where

 @var{client_name} is the name provided by the application, and @var{N}

 is a number which identifies the channel.

 Each writable client will send the acquired data to the FFmpeg input

 device.

-Once you have created one or more jack readable clients, you need to

-connect them to one or more jack writable clients.

+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

+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 list the jack clients and their properties you can invoke the command

+To list the JACK clients and their properties you can invoke the command

 @file{jack_lsp}.

-Follows an example which shows how to capture a jack readable client

+Follows an example which shows how to capture a JACK readable client

 with @file{ffmpeg}.

 @example

-# create a jack writable client with name "ffmpeg"

+# Create a JACK writable client with name "ffmpeg".

 $ ffmpeg -f jack -i ffmpeg -y out.wav

-# start the sample jack_metro readable client

+# Start the sample jack_metro readable client.

 $ jack_metro -b 120 -d 0.2 -f 4000

-# list the current jack clients

+# List the current JACK clients.

 $ jack_lsp -c

 system:capture_1

 system:capture_2

@@ -105,7 +105,7 @@ system:playback_2

 ffmpeg:input_1

 metro:120_bpm

-# connect metro to the ffmpeg writable client

+# Connect metro to the ffmpeg writable client.

 $ jack_connect metro:120_bpm ffmpeg:input_1

 @end example

@@ -122,9 +122,9 @@ Open Sound System input device.

 The filename to provide to the input device is the device node

 representing the OSS input device, and is usually set to

-@file{/dev/dsp/}.

+@file{/dev/dsp}.

-For example to grab from @file{/dev/dsp/} using @file{ffmpeg} use the

+For example to grab from @file{/dev/dsp} using @file{ffmpeg} use the

 command:

 @example

 ffmpeg -f oss -i /dev/dsp /tmp/oss.wav

@@ -139,14 +139,14 @@ Video4Linux and Video4Linux2 input video devices.

 The name of the device to grab is a file device node, usually Linux

 systems tend to automatically create such nodes when the device

-(e.g. an USB webcam) is plugged to the system, and has a name of the

+(e.g. an USB webcam) is plugged into the system, and has a name of the

 kind @file{/dev/video@var{N}}, where @var{N} is a number associated to

 the device.

 Video4Linux and Video4Linux2 devices only support a limited set of

 @var{width}x@var{height} sizes and framerates. You can check which are

-supported for example using the command @file{dov4l} for Video4Linux

-devices, and the command @file{v4l-info} for Video4Linux2 devices.

+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.

@@ -157,19 +157,19 @@ dropped in later versions.

 Follow some usage examples of the video4linux devices with the ff*

 tools.

 @example

-# grab and show the input of a video4linux device

+# Grab and show the input of a video4linux device.

 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, autoadjust 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, autoadjust size.

 ffmpeg -f video4linux2 -i /dev/video0 out.mpeg

 @end example

 @section vfwcap

-VFW (Video For Window) catpure input device.

+VFW (Video For Windows) capture input device.

 @section x11grab

@@ -177,31 +177,30 @@ X11 video input device.

 This device allows to capture a region of an X11 display.

-The filename passed in input has the syntax:

+The filename passed as input has the syntax:

 @example

 [@var{hostname}]:@var{display_number}.@var{screen_number}[+@var{x_offset},@var{y_offset}]

 @end example

 @var{hostname}:@var{display_number}.@var{screen_number} specifies the

-X11 display name of the screen to grab from. @var{hostname} can be not

-specified, and defaults to "localhost". The environment variable

+X11 display name of the screen to grab from. @var{hostname} can be

+ommitted, 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

-area with respect to the top/left border of the X11 screen image. They

+area with respect to the top-left border of the X11 screen. They

 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

-properties of your X11 display screen (e.g. grep for "name" or

-"dimensions").

+properties of your X11 display (e.g. grep for "name" or "dimensions").

 For example to grab from @file{:0.0} using @file{ffmpeg}:

 @example

 ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpg

-# grab at position 10,20

+# Grab at position 10,20.

 ffmpeg -f x11grab -25 -s cif -i :0.0+10,20 out.mpg

 @end example

@@ -5,8 +5,8 @@ Output devices are configured elements in FFmpeg which allow to write

 multimedia data to an output device attached to your system.

 When you configure your FFmpeg build, all the supported output devices

-are enabled by default. You can list them using the configure option

-"--list-outdevs".

+are enabled by default. You can list all available ones using the

+configure option "--list-outdevs".

 You can disable all the output devices using the configure option

 "--disable-outdevs", and selectively enable an output device using the