videoanalyse

videoanalyse — Analyse and report about the video frame

Synopsis




                    GstVideoAnalyse;

Properties


  "message"                  gboolean              : Read / Write / Construct

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 "brightness": the average brightness of the frame.

  • gdouble "brightness-variance": the brightness variance of the frame.

Example launch line

gst-launch -m videotestsrc ! videoanalyse ! ffmpegcolorspace ! ximagesink

This pipeline emits messages to the console for each frame that has been analysed.

Last reviewed on 2007-05-30 (0.10.5)

Element Information

plugin videosignal
author Wim Taymans <wim@fluendo.com>
class Filter/Effect/Video

Details

GstVideoAnalyse

typedef struct {
  GstVideoFilter videofilter;
  
  gint width, height;

  gboolean message;

  gdouble brightness;
  gdouble brightness_var;

  guint64 interval;
} GstVideoAnalyse;

Opaque datastructure.

Property Details

The "message" property

  "message"                  gboolean              : Read / Write / Construct

Post statics messages.

Default value: TRUE