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Properties
| gboolean | calculatemotion | Read / Write |
| gchar * | cellscolor | Read / Write |
| gchar * | datafile | Read / Write |
| gchar * | datafileextension | Read / Write |
| gboolean | display | Read / Write |
| gint | gap | Read / Write |
| gint | gridx | Read / Write |
| gint | gridy | Read / Write |
| gint | minimummotionframes | Read / Write |
| gchar * | motioncellsidx | Read / Write |
| gint | motioncellthickness | Read / Write |
| gchar * | motionmaskcellspos | Read / Write |
| gchar * | motionmaskcoords | Read / Write |
| gboolean | postallmotion | Read / Write |
| gint | postnomotion | Read / Write |
| gdouble | sensitivity | Read / Write |
| gdouble | threshold | Read / Write |
| gboolean | usealpha | Read / Write |
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseTransform ╰── GstVideoFilter ╰── GstOpencvVideoFilter ╰── GstMotioncells
Description
Performs motion detection on videos.
Example launch line
1 |
gst-launch-1.0 videotestsrc pattern=18 ! videorate ! videoscale ! video/x-raw,width=320,height=240,framerate=5/1 ! videoconvert ! motioncells ! videoconvert ! xvimagesink |
Synopsis
Element Information
plugin |
opencv |
author |
Robert Jobbagy <jobbagy dot robert at gmail dot com>, Nicola Murino <nicola dot murino at gmail.com> |
class |
Filter/Effect/Video |
Element Pads
name |
sink |
direction |
sink |
presence |
always |
details |
video/x-raw, format=(string)RGB, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
name |
src |
direction |
source |
presence |
always |
details |
video/x-raw, format=(string)RGB, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
Property Details
The “calculatemotion” property
“calculatemotion” gboolean
Toggles motion calculation. If FALSE, this filter does nothing.
Flags: Read / Write
Default value: TRUE
The “cellscolor” property
“cellscolor” gchar *
Color for motion cells in R,G,B format. Max per channel is 255.
Flags: Read / Write
Default value: "255,255,0"
The “datafile” property
“datafile” gchar *
Location of motioncells data file (empty string means no saving).
Flags: Read / Write
Default value: NULL
The “datafileextension” property
“datafileextension” gchar *
Extension of datafile.
Flags: Read / Write
Default value: "vamc"
The “display” property
“display” gboolean
Toggle display of motion cells on current frame.
Flags: Read / Write
Default value: FALSE
The “gap” property
“gap” gint
Interval in seconds after which motion is considered finished and a motion finished bus message is posted.
Flags: Read / Write
Allowed values: [1,60]
Default value: 5
The “gridx” property
“gridx” gint
Number of horizontal grid cells.
Flags: Read / Write
Allowed values: [8,32]
Default value: 10
The “gridy” property
“gridy” gint
Number of vertical grid cells.
Flags: Read / Write
Allowed values: [8,32]
Default value: 10
The “minimummotionframes” property
“minimummotionframes” gint
Minimum number of motion frames triggering a motion event.
Flags: Read / Write
Allowed values: [1,60]
Default value: 1
The “motioncellsidx” property
“motioncellsidx” gchar *
Describe a cell with its line and column idx separated with ":". Pass multiple cells as a comma-separated list.
Flags: Read / Write
Default value: NULL
The “motioncellthickness” property
“motioncellthickness” gint
Motion Cell Border Thickness. Set to -1 to fill motion cell.
Flags: Read / Write
Allowed values: [G_MAXULONG,5]
Default value: 1
The “motionmaskcellspos” property
“motionmaskcellspos” gchar *
Describe a cell with its line and column idx separated with ":". Pass multiple cells as a comma-separated list.
Flags: Read / Write
Default value: NULL
The “motionmaskcoords” property
“motionmaskcoords” gchar *
Describe a region with its upper left and lower right x, y coordinates separated with ":". Pass multiple regions as a comma-separated list.
Flags: Read / Write
Default value: NULL
The “postallmotion” property
“postallmotion” gboolean
Post bus messages for every motion frame or just motion start and motion stop.
Flags: Read / Write
Default value: FALSE
The “postnomotion” property
“postnomotion” gint
If non 0, post a no_motion event on the bus if no motion is detected for the given number of seconds.
Flags: Read / Write
Allowed values: [0,180]
Default value: 0
The “sensitivity” property
“sensitivity” gdouble
Motion detection sensitivity.
Flags: Read / Write
Allowed values: [0,1]
Default value: 0.5
The “threshold” property
“threshold” gdouble
Threshold value for motion. Filter detects motion when at least this fraction of the cells have moved.
Flags: Read / Write
Allowed values: [0,1]
Default value: 0.01
The “usealpha” property
“usealpha” gboolean
Toggle usage of alpha blending on frames with motion cells.
Flags: Read / Write
Default value: TRUE