https://ffmpeg.org/doxygen/4.2/vf__deflicker_8c.html
FFmpeg: libavfilter/vf_deflicker.c File Reference
c fileffmpegvfdeflickerreference
https://webrtc.googlesource.com/src/+/ba7da8b9d236ac2e6d0fb7c92a4d7f9bdf53a8c0/resources/deflicker_before_cif_short.yuv.sha1?autodive=0%2F%2F%2F%2F%2F%2F
resources/deflicker_before_cif_short.yuv.sha1 - src - Git at Google
resourcesdeflickercifshort