man motion (Commandes) - Detect motion using a video4linux device

NAME

motion - Detect motion using a video4linux device

SYNOPSIS

motion [ -hns ] [ -c config file path]

DESCRIPTION

Motion uses a video4linux device to detect motion. If motion is detected both normal and motion pictures will be taken. Motion can also take actions to notify you if needed. Creation of automated snapshots is also possible.

OPTIONS

-c
Full path and filename of config file. E.g. /home/kurt/motion.conf. Default is /usr/local/etc unless specified differently when building Motion. Many RPMs and debian packages will most likely use /etc or /etc/motion as default.
-h
Show help screen.
-n
Run in non-daemon mode.
-s
Run in setup mode. Also forces non-daemon mode
-d
Run in debug mode.

CONFIG FILE OPTIONS

SIGNALS

Motion responds to the following signals:

SIGHUP
The config file will be reread.
SIGTERM
If needed motion will create an mpeg file of the last event and exit
SIGUSR1
Motion will create an mpeg file of the current event.

NOTES

Snapshot
A snapshot is a picture taken at regular intervals independently of any movement in the picture.
Motion image
A "motion" image/mpeg shows the pixels that have actually changed during the last frames. These pictures are not very useful for normal presentation to the public but they are quite useful for testing and tuning and making mask files as you can see exactly where motion sees something moving. Motion is shown in greytones. If labelling is enabled the largest area is marked as blue. Smart mask is shown in read.
Normal image
A "normal" image is the real image taken by the camera with text overlayed.
Threads and config files
If Motion was invoked with command line option -c pathname Motion will expect the config file to be as specified. When you specify the config file on the command line with -c you can call it anything.

If you do not specify -c or the filename you give Motion does not exist, Motion will search for the configuration file called 'motion.conf' in the following order:

1. Current directory from where motion was invoked

2. Then in a directory called '.motion' in the current users home directory (shell environment variable $HOME). E.g. /home/goofy/.motion/motion.conf

3. The directory defined by the --sysconfdir=DIR when running .configure during installation of Motion (If this option was not defined the default is /usr/local/etc/)

If you have write access to /usr/local/etc then the editor recommends having only one motion.conf file in the default /usr/local/etc/ directory.

Motion has a configuration file in the distribution package called motion-dist.conf. When you run 'make install' this files gets copied to the /usr/local/etc directory.

The configuration file needs to be renamed from motion-dist.conf to motion.conf. The original file is called motion-dist.conf so that your perfectly working motion.conf file does not accidentally get overwritten when you re-install or upgrade to a newer version of Motion.

If you have more than one camera you should not try and invoke Motion more times. Motion is made to work with more than one camera in a very elegant way and the way to do it is to create a number of thread config files. Motion will then create an extra tread of itself for each camera. If you only have one camera you only need the motion.conf file. The minute you have two or more cameras you must have one thread config file per camera besides the motion.conf file.

So if you have for example two cameras you need motion.conf and two thread config files. Total of 3 config files.

An option that is common to all cameras can be placed in motion.conf. (You can also put all parameters in the thread files but that makes a lot of editing when you change a common thing).

An option that is unique to a camera must be defined in each thread file.

The first camera is defined in the first thread file called from motion.conf. The 2nd camera is defined in the 2nd thread file called from motion.conf etc.

Any option defined in motion.conf will be used for all cameras except for the cameras in which the same option is defined in a thread config file.

Motion reads its configuration parameters in the following sequence. If the same parameter exists more than one place the last one read wins.

1. Motion reads the configuration file motion.conf from the beginning of the file going down line by line.

2. If the option "thread" is defined in motion.conf, the thread configuration file(s) is/(are) read.

3. Motion continues reading the rest of the motion.conf file. Any options from here will overrule the same option previously defines in a thread config file.

4. Motion reads the command line option again overruling any previously defined options.

So always call the thread config files in the end of the motion.conf file. If you define options in motion.conf AFTER the thread file calls, the same options in the thread files will never be used. So always put the thread file call at the end of motion.conf.

If motion is built without specific features such as ffmpeg, mysql etc it will ignore the options that belongs to these features. You do not have to remove them or comment them out.

If you run the http control command http://host:port/0/config/writeyes, motion will overwrite motion.conf and all the thread.conf files by autogenerated config files neatly formatted and only with the features included that Motion was built with. If you later re-build Motion with more features or upgrade to a new version, you can use your old config files, run the motion.conf.write command, and you will have new config files with the new options included all set to their default values. This makes upgrading very easy to do.
Conversion Specifiers for Advanced Filename and Text Features
The table below shows all the supported Conversion Specifiers you can use in the options text_left, text_right, snapshot_filename, jpeg_filename, ffmpeg_filename, timelapse_filename, on_event_start, on_event_end, on_picture_save, on_movie_start, on_movie_end, and on_motion_detected.

In text_left and text_right you can additionally use 'n' for new line.
%a
The abbreviated weekday name according to the current locale.
%A
The full weekday name according to the current locale.
%b
The abbreviated month name according to the current locale.
%B
The full month name according to the current locale.
%c
The preferred date and time representation for the current locale.
%d
The day of the month as a decimal number (range 01 to 31).
%D
Number of pixels detected as Motion. If labelling is enabled the number is the number of pixels in the largest labelled motion area.
%E
Modifier: use alternative format, see below.
%F
Equivalent to %Y-%m-%d (the ISO 8601 date format).
%H
The hour as a decimal number using a 24-hour clock (range 00 to 23).
%i
Width of the rectangle containing the motion pixels (the rectangle that is shown on the image when locate is on).
%I
The hour as a decimal number using a 12-hour clock (range 01 to 12).
%j
The day of the year as a decimal number (range 001 to 366).
%J
Height of the rectangle containing the motion pixels (the rectangle that is shown on the image when locate is on).
%k
The hour (24-hour clock) as a decimal number (range 0 to 23); single digits are preceded by a blank. (See also %H.)
%K
X coordinate in pixels of the center point of motion. Origin is upper left corner.
%l
The hour (12-hour clock) as a decimal number (range 1 to 12); single digits are preceded by a blank. (See also %I.)
%L
Y coordinate in pixels of the center point of motion. Origin is upper left corner and number is positive moving downwards (I may change this soon).
%m
The month as a decimal number (range 01 to 12).
%M
The minute as a decimal number (range 00 to 59).
%N
Noise level.
%o
Threshold. The number of detected pixels required to trigger motion. When threshold_tune is 'on' this can be used to show the current tuned value of threshold.
%p
Either 'AM' or 'PM' according to the given time value, or the corresponding strings for the current locale. Noon is treated as `pm' and midnight as `am'.
%P
Like %p but in lowercase: `am' or `pm' or a corresponding string for the current locale.
%q
Picture frame number within current second. For jpeg filenames this should always be included in the filename if you save more then 1 picture per second to ensure unique filenames. It is not needed in filenames for mpegs.
%Q
Number of detected labels found by the despeckle feature.
%r
The time in a.m. or p.m. notation.
%R
The time in 24-hour notation (%H:%M).
%s
The number of seconds since the Epoch, i.e., since 1970-01-01 00:00:00 UTC.
%S
The second as a decimal number (range 00 to 61).
%T
The time in 24-hour notation (%H:%M:%S).
%u
The day of the week as a decimal, range 1 to 7, Monday being 1. See also %w.
%U
The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01. See also %V and %W.
%v
Event number. An event is a series of motion detections happening with less than 'gap' seconds between them.
%V
The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week. See also %U and %W.
%w
The day of the week as a decimal, range 0 to 6, Sunday being 0. See also %u.
%W
The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01.
%x
The preferred date representation for the current locale without the time.
%X
The preferred time representation for the current locale without the date.
%y
The year as a decimal number without a century (range 00 to 99).
%Y
The year as a decimal number including the century.
%z
The time-zone as hour offset from GMT.
%Z
The time zone or name or abbreviation.
More information
Motion homepage: http://motion.sourceforge.net/

Motion Guide (user and installation guide): http://www.lavrsen.dk/twiki/bin/view/Motion/MotionGuide

AUTHORS

Jeroen Vreeken (pe1rxq@amsat.org), Folkert van Heusden, Kenneth Lavrsen (kenneth@lavrsen.dk)

These are the options that can be used in the config file. They are overridden by the commandline! All number values are integer numbers (no decimals allowed). Boolean options can be on or off (values "1", "yes" and "on" all means true and any other value means false).
auto_brightness boolean
Values: on, off / Default: off

Let motion regulate the brightness of a video device. Only recommended for cameras without auto brightness
brightness integer
Values: 0 - 255 / Default: 0 (disabled)

The brightness level for the video device.
contrast boolean
Values: 0 - 255 / Default: 0 (disabled)

The contrast level for the video device.
control_authentication string
Values: Max 4096 characters / Default: Not defined

To protect HTTP Control by username and password, use this option for HTTP 1.1 Basic authentication. The string is specified as username:password. Do not specify this option for no authentication. This option must be placed in motion.conf and not in a thread config file.
control_html_output boolean
Values: on, off / Default: on

Enable HTML in the answer sent back to a browser connecting to the control_port. This option must be placed in motion.conf and not in a thread config file.
control_localhost boolean
Values: on, off / Default: on

Limits the http (html) control to the localhost. This option must be placed in motion.conf and not in a thread config file.
control_port integer
Values: 0 - 65535 / Default: 0 (disabled)

Sets the port number for the http (html using browser) based remote control. This option must be placed in motion.conf and not in a thread config file.
daemon boolean
Values: on, off / Default: off

Start in daemon (background) mode and release terminal. This option must be placed in motion.conf and not in a thread config file.
despeckle string
Values: EedDl / Default: Not defined

Despeckle motion image using combinations of (E/e)rode or (D/d)ilate. And ending with optional (l)abeling.
ffmpeg_bps integer
Values: 0 - 9999999 / Default: 400000

Bitrate of mpegs produced by ffmpeg. Bitrate is bits per second. Default: 400000 (400kbps). Higher value mans better quality and larger files. Option requires that ffmpeg libraries are installed.
ffmpeg_cap_motion boolean
Values: on, off / Default: off

Use ffmpeg libraries to encode motion type mpeg movies where you only see the pixels that changes.
ffmpeg_cap_new boolean
Values: on, off / Default: off

Use ffmpeg libraries to encode mpeg movies in realtime.
ffmpeg_filename string
Values: Max 4095 characters / Default: %v-%Y%m%d%H%M%S

File path for motion triggered ffmpeg movies (mpeg) relative to target_dir.
ffmpeg_timelapse boolean
Values: 0 - 2147483647 / Default: 0 (disabled)

Create a timelapse movie saving a picture frame at the interval in seconds set by this parameter. Set it to 0 if not used.
ffmpeg_timelapse_mode discrete strings
Values: hourly, daily, weekly-sunday, weekly-monday, monthly, manual / Default: daily

The file rollover mode of the timelapse video.
ffmpeg_variable_bitrate integer
Values: 0, 2 - 31 / Default: 0 (disabled)

Enables and defines variable bitrate for the ffmpeg encoder. ffmpeg_bps is ignored if variable bitrate is enabled. Valid values: 0 (default) = fixed bitrate defined by ffmpeg_bps, or the range 2 - 31 where 2 means best quality and 31 is worst.
ffmpeg_video_codec discrete strings
Values: mpeg1 (ffmpeg-0.4.8 only), mpeg4, msmpeg4 / Default: mpeg4

Codec to be used by ffmpeg for the video compression. Timelapse mpegs are always made in mpeg1 format independent from this option.
framerate integer
Values: 2 - 100 / Default: 100 (no limit)

Maximum number of frames to be captured from the camera per second.
frequency boolean
Values: 0 - 999999 / Default: 0 (Not set)

The frequency to set the tuner to (kHz). Valid range: per tuner spec, default: 0 (Don't set it)
gap integer
Values: 0 - 2147483647 / Default: 60

Gap is the seconds of no motion detection that triggers the end of an event. An event is defined as a series of motion images taken within a short timeframe.
height integer
Values: Device Dependent / Default: 288

The height of each frame in pixels.
hue integer
Values: 0 - 255 / Default: 0 (disabled)

The hue level for the video device.
input integer
Values: 0 - 7, 8 = disabled / Default: 8 (disabled)

Input channel to use expressed as an integer number starting from 0. Should normally be set to 1 for video/TV cards, and 8 for USB cameras.
jpeg_filename string
Values: Max 4095 characters / Default: %v-%Y%m%d%H%M%S-%q

File path for motion triggered images (jpeg or ppm) relative to target_dir. Value 'preview' makes a jpeg filename with the same name body as the associated saved mpeg movie file.
lightswitch integer
Values: 0 - 100 / Default: 0 (disabled)

Ignore sudden massive light intensity changes given as a percentage of the picture area that changed intensity.
locate boolean
Values: on, off, preview / Default: off

Locate and draw a box around the moving object. Value 'preview' makes Motion only draw a box on a saved preview jpeg image and not on the saved mpeg movie.
low_cpu integer
Values: 0 - 100 / Default: 0 (disabled)

When this option is not zero motion will be in a low cpu mode while not detecting motion. In low cpu mode Motion reduces the framerate to the value given for this option. Value zero means disabled.
mask_file string
Values: Max 4095 characters / Default: Not defined

PGM file to use as a sensitivity mask. This picture MUST have the same width and height as the frames being captured and be in binary format.
max_mpeg_time integer
Values: 0 (infinite) - 2147483647 / Default: 3600

The maximum length of an mpeg movie in seconds. Set this to zero for unlimited length.
minimum_gap integer
Values: 0 - 2147483647 / Default: 0 (no minimum)

The minimum time between two shots in seconds.
minimum_motion_frames boolean
Values: 1 - 1000s / Default: 1

Picture frames must contain motion at least the specified number of frames in a row before they are detected as true motion. At the default of 1, all motion is detected. Valid range is 1 to thousands, but it is recommended to keep it within 1-10.
motion_video_pipe string
Values: Max 4095 characters / Default: Not defined

The video4linux video loopback input device for motion images. If a particular pipe is to be used then use the device filename of this pipe, if a dash '-' is given motion will use /proc/video/vloopback/vloopbacks to locate a free pipe. Default: not set
mysql_db string
Values: Max 4095 characters / Default: Not defined

Name of the MySQL database.
mysql_host string
Values: Max 4095 characters / Default: Not defined

IP address or domain name for the MySQL server. Use "localhost" if motion and MySQL runs on the same server.
mysql_password string
Values: Max 4095 characters / Default: Not defined

The MySQL password.
mysql_user string
Values: Max 4095 characters / Default: Not defined

The MySQL user name.
netcam_proxy string
Values: Max 4095 characters / Default: Not defined

URL to use for a netcam proxy server, if required. The syntax is http://myproxy:portnumber
netcam_url string
Values: Max 4095 characters / Default: Not defined

Specify an url to a downloadable jpeg file or raw mjpeg stream to use as input device. Such as an AXIS 2100 network camera.
netcam_userpass string
Values: Max 4095 characters / Default: Not defined

For network cameras protected by username and password, use this option for HTTP 1.1 Basic authentication. The string is specified as username:password. Do not specify this option for no authentication.
night_compensate boolean
Values: on, off / Default: off

When this option is set the noise threshold will be lowered if the picture is dark. This will improve the sensitivity in dark places. However it might also increase the number of false alarms since most cameras also compensate for this with their AGC which will increase noise.
noise_level integer
Values: 1 - 255 / Default: 32

The noise level is used as a threshold for distinguishing between noise and motion.
noise_tune boolean
Values: on, off / Default: on

Activates the automatic tuning of noise level.
norm discrete strings
Values: 0 (PAL), 1 (NTSC), 2 (SECAM), 3 (PAL NC no colour) / Default: 0 (PAL)

Select the norm of the video device. Values: 0 (PAL), 1 (NTSC), 2 (SECAM), 3 (PAL NC no colour). Default: 0 (PAL)
on_event_end string
Values: Max 4095 characters / Default: Not defined

Command to be executed when an event ends after a period of no motion. The period of no motion is defined by option gap. You can use Conversion Specifiers and spaces as part of the command.
on_event_start string
Values: Max 4095 characters / Default: Not defined

Command to be executed when an event starts. An event starts at first motion detected after a period of no motion defined by gap. You can use ConversionSpecifiers and spaces as part of the command.
on_motion_detected string
Values: Max 4095 characters / Default: Not defined

Command to be executed when a motion frame is detected. You can use Conversion Specifiers and spaces as part of the command.
on_movie_end string
Values: Max 4095 characters / Default: Not defined

Command to be executed when an ffmpeg movie is closed at the end of an event. The name of the movie will be given as argument. You can use Conversion Specifiers and spaces as part of the command.
on_movie_start string
Values: Max 4095 characters / Default: Not defined

Command to be executed when an mpeg movie is created. The name of the movie will be given as argument. You can use Conversion Specifiers and spaces as part of the command.
on_picture_save string
Values: Max 4095 characters / Default: Not defined

Command to be executed when an image is saved. The name of the image will be given as argument. You can use Conversion Specifiers and spaces as part of the command.
output_all boolean
Values: on, off / Default: off

Picture are saved continuously as if motion was detected all the time.
output_motion boolean
Values: on, off / Default: off

Output pictures with only the moving object. This feature generates the special motion type movies where you only see the pixels that changes as a graytone image. If labelling is enabled you see the largest area in blue. Smartmask is shown in red.
output_normal discrete strings
Values: on, off, first, best / Default: on

Normal image is an image that is stored when motion is detected. It is the same image that was taken by the camera. I.e. not a motion image like defined by output_motion. Default is that normal images are stored.
pgsql_db string
Values: Max 4095 characters / Default: Not defined

Name of the PostgreSQL database.
pgsql_host string
Values: Max 4095 characters / Default: Not defined

IP address or domain name for the PostgreSQL server. Use "localhost" if motion and PostgreSQL runs on the same server.
pgsql_password string
Values: Max 4095 characters / Default: Not defined

The PostgreSQL password.
pgsql_port integer
Values: 0 - 65535 / Default: 5432

The PostgreSQL server port number.
pgsql_user string
Values: Max 4095 characters / Default: Not defined

The PostgreSQL user name.
post_capture integer
Values: 0 - 2147483647 / Default: 0 (disabled)

Specifies the number of frames to be captured after motion has been detected.
ppm boolean
Values: on, off / Default: off

Output ppm images instead of jpeg. This uses less CPU time, but causes a LOT of hard disk I/O, and it is generally slower than jpeg.
pre_capture integer
Values: 0 - 100s / Default: 0 (disabled)

Specifies the number of previous frames to be outputted at motion detection. Recommended range: 0 to 5, default=0. Do not use large values! Large values will cause Motion to skip video frames and cause unsmooth mpegs. To smooth mpegs use larger values of post_capture instead.
quality integer
Values: 1 - 100 / Default: 75

The quality for the jpeg images in percent.
quiet boolean
Values: on, off / Default: off

Be quiet, don't output beeps when detecting motion.
rotate discrete strings
Values: 0, 90, 180, 270 / Default: 0

Rotate image the given number of degrees. The rotation affects all saved images as well as mpeg movies.
roundrobin_frames integer
Values: 1 - 2147483647 / Default: 1

Specifies the number of frames to capture before switching inputs, this way also slow switching (e.g. every second) is possible.
roundrobin_skip integer
Values: 1 - 2147483647 / Default: 1

Specifies the number of frames to skip after a switch. (1 if you are feeling lucky, 2 if you want to be safe).
saturation integer
Values: 0 - 255 / Default: 0 (disabled)

The colour saturation level for the video device.
setup_mode boolean
Values: on, off / Default: off

Run Motion in setup mode.
smart_mask_speed integer
Values: 0 - 10 / Default: 0 (disabled)

Slugginess of the smart mask. Default is 0 = DISABLED. 1 is slow, 10 is fast.
snapshot_filename string
Values: Max 4095 characters / Default: %v-%Y%m%d%H%M%S-snapshot

File path for snapshots (jpeg or ppm) relative to target_dir.
snapshot_interval integer
Values: 0 - 2147483647 / Default: 0 (disabled)

Make automated snapshots every 'snapshot_interval' seconds.
sql_log_image boolean
Values: on, off / Default: on

Log to the database when creating motion triggered image file.
sql_log_mpeg boolean
Values: on, off / Default: off

Log to the database when creating motion triggered mpeg file.
sql_log_snapshot boolean
Values: on, off / Default: on

Log to the database when creating a snapshot image file.
sql_log_timelapse boolean
Values: on, off / Default: off

Log to the database when creating timelapse mpeg file
switchfilter boolean
Values: on, off / Default: off

Turns the switch filter on or off. The filter can distinguish between most switching noise and real motion. With this you can even set roundrobin_skip to 1 without generating much false detection.
target_dir string
Values: Max 4095 characters / Default: Not defined = current working directory

Target directory for picture and movie files.
text_changes boolean
Values: on, off / Default: off

Turns the text showing changed pixels on/off.
text_double boolean
Values: on, off / Default: off

Draw characters at twice normal size on images.
text_left string
Values: Max 4095 characters / Default: Not defined

User defined text overlayed on each in the lower left corner. Use A-Z, a-z, 0-9, " / ( ) @ ~ # < > ¦ , . : - + _ n and conversion specifiers (codes starting by a %).
text_right string
Values: Max 4095 characters / Default: %Y-%m-%dn%T

User defined text overlayed on each in the lower right corner. Use A-Z, a-z, 0-9, " / ( ) @ ~ # < > ¦ , . : - + _ n and conversion specifiers (codes starting by a %). Default: %Y-%m-%dn%T = date in ISO format and time in 24 hour clock
thread string
Values: Max 4095 characters / Default: Not defined

Specifies full path and filename for a thread config file. Each camera needs a thread config file containing the options that are unique to the camera. If you only have one camera you do not need thread config files. If you have two or more cameras you need one thread config file for each camera in addition to motion.conf. This option must be placed in motion.conf and not in a thread config file.
threshold integer
Values: 1 - 2147483647 / Default: 1500

Threshold for declaring motion. The threshold is the number of changed pixels counted after noise filtering, masking, despeckle, and labelling.
threshold_tune boolean
Values: on, off / Default: off

Activates the automatic tuning of threshold level.
timelapse_filename string
Values: Max 4095 characters / Default: %v-%Y%m%d-timelapse

File path for timelapse mpegs relative to target_dir (ffmpeg only).
track_iomojo_id integer
Values: 0 - 2147483647 / Default: 0

Use this option if you have an iomojo smilecam connected to the serial port instead of a general stepper motor controller.
track_maxx integer
Values: 0 - 2147483647 / Default: 0

The maximum position for servo x.
track_motorx integer
Values: -1 - 2147483647 / Default: -1

The motor number that is used for controlling the x-axis.
track_port string
Values: Max 4095 characters / Default: Not defined

This is the device name of the serial port to which the stepper motor interface is connected.
track_speed integer
Values: 0 - 255 / Default: 255

Speed to set the motor to.
track_stepsize integer
Values: 0 - 255 / Default: 40

Number of steps to make.
track_type discrete strings
Values: 0 (none), 1 (stepper), 2 (iomojo), 3 (pwc), 4 (generic) / Default: 0 (None)

Type of tracker.
tunerdevice string
Values: Max 4095 characters / Default: /dev/tuner0

The tuner device used for controlling the tuner in a tuner card. This option is only used when Motion is compiled for FreeBSD.
video_pipe string
Values: Max 4095 characters / Default: Not defined

The video4linux video loopback input device for normal images. If a particular pipe is to be used then use the device filename of this pipe. If a dash '-' is given motion will use /proc/video/vloopback/vloopbacks to locate a free pipe.
videodevice string
Values: Max 4095 characters / Default: /dev/video0 (FreeBSD: /dev/bktr0)

The video device to be used for capturing. Default for Linux is /dev/video0. for FreeBSD the default is /dev/bktr0.
webcam_limit integer
Values: 0 - 2147483647 / Default: 0 (unlimited)

Limit the number of frames to number frames. After 'webcam_limit' number of frames the connection will be closed by motion. The value 0 means unlimited.
webcam_localhost boolean
Values: on, off / Default: on

Limits the access to the webcam to the localhost.
webcam_maxrate integer
Values: 1 - 100 / Default: 1

Limit the framerate of the webcam. Default is 1. Set the value to 100 for practically unlimited.
webcam_motion boolean
Values: on, off / Default: off

If set to 'on' Motion sends slows down the webcam stream to 1 picture per second when no motion is detected. When motion is detected the stream runs as defined by webcam_maxrate. When 'off' the webcam stream always runs as defined by webcam_maxrate.
webcam_port integer
Values: 0 - 65535 / Default: 0 (disabled)

TCP port on which motion will listen for incoming connects with its webcam server.
webcam_quality integer
Values: 1 - 100 / Default: 50

Quality setting in percent for the mjpeg picture frames transferred over the webcam connection. Keep it low to restrict needed bandwidth.
width integer
Values: Device Dependent / Default: 352

The width in pixels of each frame. Valid range is camera dependent.