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: – Rank – none Plugin – libav Package – GStreamer FFMPEG Plug-insFilter/Compare/Video
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 ]
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 ]
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 ]
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
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