| Top | |
|
|
|
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseTransform ╰── GstVideoFilter ╰── GstVideoAnalyse
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.
GstClockTimeduration:the duration of the buffer.
gdoubleluma-average: the average brightness of the frame. Range: 0.0-1.0
gdoubleluma-variance: the brightness variance of the frame.
1 |
gst-launch-1.0 -m videotestsrc ! videoanalyse ! videoconvert ! ximagesink |
This pipeline emits messages to the console for each frame that has been analysed.
plugin |
videosignal |
author |
Wim Taymans <wim@fluendo.com> |
class |
Filter/Analyzer/Video |
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 ] |
“message” property“message” gboolean
Post statics messages.
Flags: Read / Write / Construct
Default value: TRUE