Created
July 18, 2020 20:25
Bash Script to convert HDR video files into SDR format. Decent CPU can re-encode around 3-4x faster than video length.
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#!/bin/bash | |
function convert { | |
filename=$(echo "$1" | cut -f 1 -d '.') | |
newFilename=${filename}_HD.mkv | |
if [ -f "$newFilename" ]; then | |
echo \* $newFilename already exists! | |
else | |
COLORS=$(ffprobe -show_streams -v error "$1" |egrep "^color_transfer|^color_space=|^color_primaries=" |head -3) | |
for C in $COLORS; do | |
if [[ "$C" = "color_space="* ]]; then | |
COLORSPACE=${C##*=} | |
elif [[ "$C" = "color_transfer="* ]]; then | |
COLORTRANSFER=${C##*=} | |
elif [[ "$C" = "color_primaries="* ]]; then | |
COLORPRIMARIES=${C##*=} | |
fi | |
done | |
if [ "${COLORSPACE}" = "bt2020nc" ] && [ "${COLORTRANSFER}" = "smpte2084" ] && [ "${COLORPRIMARIES}" = "bt2020" ]; then | |
# this file is HDR, convert a duplicate down to SDR | |
echo $1 contains HDR video track, creating duplicate SDR video file ${filename}... | |
ffmpeg -vsync 0 -hide_banner -v quiet -stats -hwaccel cuda -init_hw_device opencl=ocl -filter_hw_device ocl -extra_hw_frames 3 -threads 16 -c:v hevc_cuvid -resize 1920x1080 -i "$1" -vf "format=p010,hwupload,tonemap_opencl=tonemap=mobius:param=0.01:desat=0:r=tv:p=bt709:t=bt709:m=bt709:format=nv12,hwdownload,format=nv12" -c:a copy -c:s copy -c:v libx264 -max_muxing_queue_size 9999 "${newFilename}" | |
else | |
echo \* $1 already SDR file, no need to convert! | |
fi | |
fi | |
} | |
for f in "$@" | |
do | |
echo "Processing $f..." | |
convert $f | |
echo | |
done |
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Will create new files with the same filename, but "_HD.mkv" on the end of the filename.