added example for deshake and vidstab

Author: kibotu

tests/stabilization/deshake_source_vidstab.mp4

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+sh ffmpeg_stabilization_deshake.sh
+sh ffmpeg_stabilization_vidstab.sh
+sh ffmpeg_side_by_side.sh

tests/stabilization/deshake_vidstab.mp4

@@ -1,3 +1,8 @@
 #!/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
+# 2 videos side by side
+ffmpeg -i stabilized_deshake.mp4 -i stabilized_vidstab.mp4 -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" deshake_vidstab.mp4
+
+# 3 videos side by side
+
+ffmpeg -i stabilized_deshake.mp4 -i source_video.mp4 -i stabilized_vidstab.mp4 -filter_complex "[1:v][0:v]scale2ref=oh*mdar:ih[1v][0v];[2:v][0v]scale2ref=oh*mdar:ih[2v][0v];[0v][1v][2v]hstack=3,scale='2*trunc(iw/2)':'2*trunc(ih/2)'" deshake_source_vidstab.mp4

tests/stabilization/ffmpeg_create_stabilization_comparrison.sh

@@ -1,6 +1,10 @@
 #!/usr/bin/env bash
 
+# ffmpeg vidstab installation guide:
+# https://github.com/varenc/homebrew-ffmpeg#installation-and-usage
+#
 # https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1
+# https://github.com/georgmartius/vid.stab
 #
 # shakiness
 #   Set how shaky the video is and how quick the camera is. It accepts an integer in the range 1-10,
@@ -17,6 +21,8 @@
 #   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.
-
+#
+# an
+#   removes audio track
 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
+ffmpeg -i source_video.mp4 -vf vidstabtransform=smoothing=30:input="transforms.trf" -an stabilized_vidstab.mp4