deflicker

# removing flickering by removing every other frame.
# example video link https://youtu.be/Lxl1HM167qs
# there are multiple steps

# Step 1 - to change the format of the video file:
ffmpeg -i input.MOV -an -vcodec rawvideo -pix_fmt yuv420p rawbitstream.yuv

# Step 2 - drops all the even frames from the file:
ffmpeg -r 2 -s WxH -i rawbitstream.yuv -filter:v select="mod(n-1\,2)" -c:v rawvideo -r 1 -format rawvideo -pix_fmt yuv420p -an odd.yuv

# Step 3 - drops all the odd frames from the file:
ffmpeg -r 2 -s WxH -i rawbitstream.yuv -filter:v select="not(mod(n-1\,2))" -c:v rawvideo -r 1 -format rawvideo -pix_fmt yuv420p -an even.yuv

# Step 4 - converts the files to .MOV files:
ffmpeg -s 1920x1080 -i even.yuv even.MOV
ffmpeg -s 1920x1080 -i odd.yuv odd.MOV

# Step 5 - is to slow the video down
# because after we dropped every other frame it made the video speed up.:
ffmpeg -i even.MOV -vf "setpts=1.67*PTS" Slowed-even.MOV
ffmpeg -i odd.MOV -vf "setpts=1.67*PTS" Slowed-odd.MOV

# Link: https://superuser.com/questions/573747/drop-every-even-or-odd-frames-using-ffmpeg