videoanalyse
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: 0.0-1.0
- 
gdouble luma-variance: the brightness variance of the frame.
Example launch line
 gst-launch-1.0 -m videotestsrc ! videoanalyse ! videoconvert ! ximagesink
This pipeline emits messages to the console for each frame that has been analysed.
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstBaseTransform ╰──GstVideoFilter ╰──videoanalyse
Factory details
Authors: – Wim Taymans 
Classification: – Filter/Analyzer/Video
Rank – none
Plugin – videosignal
Package – GStreamer Bad Plug-ins
Pad Templates
sink
        video/x-raw:
         format: { I420, YV12, Y444, Y42B, Y41B }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
src
        video/x-raw:
         format: { I420, YV12, Y444, Y42B, Y41B }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
Properties
message
“message” gboolean
Post statics messages
Flags : Read / Write / Construct
Default value : true
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