#!/bin/bash
set -o pipefail
IFS=$'\n\t'

# You'll want to run this kinda like this...
# find /mnt/ -maxdepth 25 -regex ".*\.\(mkv\|mp4\|wmv\|flv\|webm\|mov\|avi\|m4v\)" | parallel ./parallel_convert_265 {}
# OR
# parallel 'find {} -type f -name "*.mkv"' ::: /Muninn/TV /Muninn/Movies | parallel --progress ~/convert265/265 {}
# parallel 'find {} -type f -maxdepth 5 -regex ".*\.\(mkv\|mp4\|wmv\|flv\|webm\|mov\|avi\|m4v\)"' ::: /Muninn/TV /Muninn/Movies | parallel --jobs 2 --progress ~/convert265/265 {}

for video; do
  d=$(dirname "$video")
  filename=$(basename "$video")
  extension="${filename##*.}"
  filename="${filename%.*}"
  video_codec=$(nice -n 19 mediainfo --Inform="Video;%Format%" "${video}")
  echo -e "${video} // ${video_codec}"
  if [[ ! ${video_codec} =~ "HEVC" ]]; then
    _filename=$(echo "${filename}" | sed -e 's/h264/x265/g' -e 's/x264/x265/g' -e 's/AVC/x265/g' -e 's/XviD/x265/g').mkv
    nice -n 19 ffmpeg -hide_banner -loglevel info -y -threads 4 -vaapi_device /dev/dri/renderD128 -analyzeduration 20000000 -probesize 20000000 \
      -i "${video}" -map 0:v:0 -map 0:a -c:a copy -vf 'format=nv12,hwupload' \
      -c:v hevc_vaapi \
      -max_muxing_queue_size 1024 -movflags +faststart -movflags use_metadata_tags "/dev/shm/$_filename" || exit 1
    mv -vu "/dev/shm/${_filename}" "${d}/${_filename}" || rm -f "/dev/shm/${_filename}"
    if [[ -f "${d}/${_filename}" ]]; then
      cmp "${d}/${_filename}" "${video}" || rm -vf "${video}"
    fi
  fi
done