www.makemkv.com

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# set main variables
TITLE="Movie Name (YEAR)"
INPUT="/home/user/${TITLE} UHD.mkv"
OUTPUT="/home/user/${TITLE} 4K ffmpeg 2 Audio.mkv"

# read hdr variables from source file
ffprobe -loglevel quiet -read_intervals "%+#2" -select_streams v:0 -show_entries side_data "${TITLE} UHD.mkv" | egrep -m 1 -A 10 'Mastering display metadata' | grep -v 'Mastering display metadata' >/tmp/variables.txt
ffprobe -loglevel quiet -read_intervals "%+#2" -select_streams v:0 -show_entries side_data "${TITLE} UHD.mkv" | egrep -m 1 -A 2 'Content light level metadata' | grep -v 'Content light level metadata' >>/tmp/variables.txt
source /tmp/variables.txt
cat /tmp/variables.txt

# ffmpeg transcode
ffmpeg -y -i "${INPUT}" -t 00:05:00 -hide_banner -stats -loglevel quiet -analyzeduration 100M -probesize 100M -max_muxing_queue_size 9999 -map 0:v:0 -map 0:a:0 -map 0:a:0 -vf "crop=3840:1600:0:280" -pix_fmt yuv420p10le -vcodec libx265 -preset slow -x265-params "keyint=60:bframes=3:vbv-bufsize=75000:vbv-maxrate=75000:colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:master-display='G("$green_x","$green_y")B("$blue_x","$blue_y")R("$red_x","$red_y")WP("$white_point_x","$white_point_y")L("$max_luminance","$min_luminance")':max-cll='"$max_content","$max_average"'" -crf 24 -force_key_frames "expr:gte(t,n_forced*2)" -c:a:0 copy -c:a:1 dca -ab 1509k -map_metadata -1 -metadata title="${TITLE}" -metadata:s:a:0 language=eng -metadata:s:a:1 language=eng -map_chapters -1 -sn -strict -2 "${OUTPUT}"

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Audio #1
ID                                       : 2
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 1 h 37 min
Bit rate mode                            : Variable
Bit rate                                 : 7 644 kb/s
Maximum bit rate                         : 9 270 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Compression mode                         : Lossless
Stream size                              : 5.20 GiB (30%)
Language                                 : English
Default                                  : Yes
Forced                                   : No
Number of dynamic objects                : 13
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

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function readhdrvalues () {
  echo "Reading HDR values..."
  echo $1
  ffprobe -loglevel quiet -read_intervals "%+#2" -select_streams v:0 -show_entries side_data "$1" | egrep -m 1 -A 10 'Mastering display metadata' | grep -v 'Mastering display 
metadata' | sed 's/\/.*//g' >/tmp/variables.txt
  ffprobe -loglevel quiet -read_intervals "%+#2" -select_streams v:0 -show_entries side_data "$1" | egrep -m 1 -A 2 'Content light level metadata' | grep -v 'Content light lev
el metadata' | sed 's/\/.*//g' >>/tmp/variables.txt
  source /tmp/variables.txt
  cat /tmp/variables.txt
  echo "...done."
}