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Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseTransform ╰── GstVideoFilter ╰── GstVideoAnalyse
Description
This plugin analyses every video frame and if the “message”
property is TRUE, posts an element message with video statistics called
GstVideoAnalyse.
The message's structure contains these fields:
GstClockTime
timestamp: the timestamp of the buffer that triggered the message.GstClockTime
stream-time: the stream time of the buffer.GstClockTime
running-time: the running_time of the buffer.GstClockTime
duration:the duration of the buffer.gdouble
luma-average: the average brightness of the frame. Range: 0.0-1.0gdouble
luma-variance: the brightness variance of the frame.
Example launch line
1 |
gst-launch-1.0 -m videotestsrc ! videoanalyse ! videoconvert ! ximagesink |
This pipeline emits messages to the console for each frame that has been analysed.
Synopsis
Element Information
plugin |
videosignal |
author |
Wim Taymans <wim@fluendo.com> |
class |
Filter/Analyzer/Video |
Element Pads
name |
sink |
direction |
sink |
presence |
always |
details |
video/x-raw, format=(string){ I420, YV12, Y444, Y42B, Y41B }, 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){ I420, YV12, Y444, Y42B, Y41B }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
Property Details
The “message” property
“message” gboolean
Post statics messages.
Flags: Read / Write / Construct
Default value: TRUE