avvideocompare

avvideocompare accepts two input video streams with the same width, height, framerate and format. The two incoming buffers are compared to each other via the chosen compare method (e.g. ssim or psnr).

If the stats-file property is specified, then the computed result for each frame comparison will be written to the file, or stdout if stats-file is '-'.

The first incoming buffer is passed through, unchanged, to the srcpad.

Sample pipelines

gst-launch-1.0 videotestsrc num-buffers=100          \
  ! video/x-raw,format=NV12                          \
  ! videobalance brightness=0.005 hue=0.005          \
  ! avvideocompare method=psnr stats-file=- name=cmp \
  ! fakesink videotestsrc ! video/x-raw,format=NV12  \
  ! cmp.

gst-launch-1.0 videotestsrc num-buffers=100                  \
  ! tee name=orig ! queue ! avenc_mjpeg                      \
  ! jpegparse ! avdec_mjpeg                                  \
  ! avvideocompare method=ssim stats-file=stats.log name=cmp \
  ! fakesink orig. ! queue ! cmp.

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──avvideocompare

Factory details

Authors: – U. Artie Eoff

Classification: – Filter/Compare/Video

Rank – none

Plugin – libav

Package – GStreamer FFMPEG Plug-ins

Pad Templates

sink_1

video/x-raw:
         format: { ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx, RGB16, GRAY8, NV12, NV21, YUY2, UYVY, I420, Y42B, Y444, VUYA, P010_10LE, Y410, P012_LE, Y212_LE, Y412_LE }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

sink_2

video/x-raw:
         format: { ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx, RGB16, GRAY8, NV12, NV21, YUY2, UYVY, I420, Y42B, Y444, VUYA, P010_10LE, Y410, P012_LE, Y212_LE, Y412_LE }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

src

video/x-raw:
         format: { ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx, RGB16, GRAY8, NV12, NV21, YUY2, UYVY, I420, Y42B, Y444, VUYA, P010_10LE, Y410, P012_LE, Y212_LE, Y412_LE }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

Properties

method 

“method” Ffmpeg-vid-cmp-method *

Method to compare video frames

Flags : Read / Write

Default value : ssim (0)

stats-file 

“stats-file” gchararray

Set file where to store per-frame difference information, '-' for stdout

Flags : Read / Write

Default value : NULL

Named constants

Ffmpeg-vid-cmp-method

Members

ssim (0) – SSIM
psnr (1) – PSNR

Since : 1.24

The results of the search are