avfilter: add vmafmotion filter

Signed-off-by: Ashish Singh <[email protected]>
Signed-off-by: Ronald S. Bultje <[email protected]>

Author: ashishps1

Changelog

@@ -51,6 +51,7 @@ version <next>:
 - CUDA thumbnail filter
 - V4L2 mem2mem HW assisted codecs
 - Rockchip MPP hardware decoding
+- vmafmotion video filter
 
 
 version 3.3:

doc/filters.texi

@@ -15570,6 +15570,20 @@ vignette='PI/4+random(1)*PI/50':eval=frame
 
 @end itemize
 
+@section vmafmotion
+
+Obtain the average vmaf motion score of a video.
+It is one of the component filters of VMAF.
+
+The obtained average motion score is printed through the logging system.
+
+In the below example the input file @file{ref.mpg} is being processed and score
+is computed.
+
+@example
+ffmpeg -i ref.mpg -lavfi vmafmotion -f null -
+@end example
+
 @section vstack
 Stack input videos vertically.
 

libavfilter/Makefile

@@ -331,6 +331,7 @@ OBJS-$(CONFIG_VFLIP_FILTER)                  += vf_vflip.o
 OBJS-$(CONFIG_VIDSTABDETECT_FILTER)          += vidstabutils.o vf_vidstabdetect.o
 OBJS-$(CONFIG_VIDSTABTRANSFORM_FILTER)       += vidstabutils.o vf_vidstabtransform.o
 OBJS-$(CONFIG_VIGNETTE_FILTER)               += vf_vignette.o
+OBJS-$(CONFIG_VMAFMOTION_FILTER)             += vf_vmafmotion.o framesync.o
 OBJS-$(CONFIG_VSTACK_FILTER)                 += vf_stack.o framesync.o
 OBJS-$(CONFIG_W3FDIF_FILTER)                 += vf_w3fdif.o
 OBJS-$(CONFIG_WAVEFORM_FILTER)               += vf_waveform.o

libavfilter/allfilters.c

@@ -342,6 +342,7 @@ static void register_all(void)
     REGISTER_FILTER(VIDSTABDETECT,  vidstabdetect,  vf);
     REGISTER_FILTER(VIDSTABTRANSFORM, vidstabtransform, vf);
     REGISTER_FILTER(VIGNETTE,       vignette,       vf);
+    REGISTER_FILTER(VMAFMOTION,     vmafmotion,     vf);
     REGISTER_FILTER(VSTACK,         vstack,         vf);
     REGISTER_FILTER(W3FDIF,         w3fdif,         vf);
     REGISTER_FILTER(WAVEFORM,       waveform,       vf);