added stabilization scripts

Author: kibotu

tests/stabilization/ffmpeg_side_by_side.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+ffmpeg -i stabilized_deshake.mp4 -i source_video.mp4 -i stabilized_vidstab.mp4 -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" merged.mp4

tests/stabilization/ffmpeg_stabilization_deshake.sh

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+#!/usr/bin/env bash
+
+# https://www.ffmpeg.org/ffmpeg-filters.html#deshake
+
+ffmpeg -i source_video.mp4 -vf deshake stabilized_deshake.mp4

tests/stabilization/ffmpeg_stabilization_vidstab.sh

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+#!/usr/bin/env bash
+
+# https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1
+#
+# shakiness
+#   Set how shaky the video is and how quick the camera is. It accepts an integer in the range 1-10,
+#   a value of 1 means little shakiness, a value of 10 means strong shakiness. Default value is 5.
+#
+# accuracy
+#   Set the accuracy of the detection process. It must be a value in the range 1-15.
+#   A value of 1 means low accuracy, a value of 15 means high accuracy. Default value is 15.
+#
+# smoothing
+#   Set the number of frames (value*2 + 1) used for lowpass filtering the camera movements.
+#   Default value is 10.
+#
+#   For example a number of 10 means that 21 frames are used (10 in the past and 10 in the future)
+#   to smoothen the motion in the video. A larger value leads to a smoother video,
+#   but limits the acceleration of the camera (pan/tilt movements). 0 is a special case where a static camera is simulated.
+
+ffmpeg -i source_video.mp4 -vf vidstabdetect=shakiness=10:accuracy=15 -f null -
+ffmpeg -i source_video.mp4 -vf vidstabtransform=smoothing=30:input="transforms.trf" stabilized_vidstab.mp4