I haven’t played with it much beyond calling curl - I didn’t get it to work with a batch file, but I also didn’t try very hard.
This works:
[HEVC MKV]
Description=HEVC in MKV (H.265/AC3) conversion. Creates a smaller file (50% smaller than H.264) with comparable quality but very slow.
order=handbrake,ffmpeg
ffmpeg-general=-threads 0
ffmpeg-video=-ss 3 -vf yadif=0:-1:1,hqdn3d -vcodec libx265 -preset medium -x265-params crf=18 -map 0:v -sn
ffmpeg-audio=-acodec ac3 -ab 160k -map 0:a
ffmpeg-audioac3=-acodec ac3 -ab 256k -map 0:a
ffmpeg-ext=.mkv
ffmpeg-audiodelay=skip
handbrake-general=--decomb --loose-anamorphic --verbose=2
handbrake-video=--start-at duration:3 -e x265 --encoder-preset medium -q 18
handbrake-audio=-E ffac3 -R auto -B 160 -D 0 -a 1,2,3,4,5
handbrake-audioac3=-E ffac3 -R auto -B 256 -D 0 -a 1,2,3,4,5
handbrake-ext=.mkv
handbrake-audiodelay=skip
PreConversionCommercialRemover=true
PostCustomCommandPath=C:\Windows\System32\curl.exe
PostCustomCommandParameters=http://192.168.8.9:32400/library/sections/1/refresh?X-Plex-Token=<my plex token>
PostCustomCommandHangPeriod=30
PostCustomCommandCritical=false
PostCustomCommandUISession=false
PostCustomCommandShowWindow=false
PostCustomCommandExitCodeCheck=false