convert265/265

#!/bin/bash

# .INFO
# This will try to use your gpu AMD/INTEL to transcode video into X265
# The will also remux existing video to a streaming optimized mp4 container
# If it can remux your video it will extract subtitles and delete the mkv container
# .FYI
# QSV and libfdk_aac support requires compiling your own ffmpeg
# --enable-gpl --enable-version3 --enable-gnutls --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-libfdk-aac --enable-libmfx
# .LICENSE [MIT]
# Copyright © 2023 Hugh Smalley
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

set -o pipefail
IFS=$'\n\t'

pro_dir="/opt/amdgpu-pro/etc/vulkan/icd.d"
export LD_LIBRARY_PATH="/opt/amdgpu/libdrm/lib64:/opt/amdgpu/libdrm/lib32:$LD_LIBRARY_PATH"
export VK_ICD_FILENAMES="${pro_dir}/amd_icd32.json:${pro_dir}/amd_icd64.json:$VK_ICD_FILENAMES"

# Selects english subs failing that it will get all subs
function get_subtitles() {
	# Try to get english subs if not then get all of them
	jq -r '.streams[] | select(.codec_type=="subtitle") | select(.tags.language | contains("en")) | .index' <"${video}.json" ||
		jq -r '.streams[] | select(.codec_type=="subtitle") | .index' <"${video}.json"
}

# Get all the info needed on the video file
function getinfo() {
	if [[ ! -f "${video}.json" ]]; then
		ffprobe -v quiet -print_format json -show_streams "${video}" >"${video}.json"
	fi
	d=$(dirname "${video}")
	filename=$(basename "${video}")
	filename="${filename%.*}"
	video_codec=$(jq -r '.streams[0].codec_name' <"${video}.json")
	video_height=$(jq -r '.streams[0].height' <"${video}.json")
	sub_indexes=$(get_subtitles)
	video_size=$(stat -c%s "${video}")
	video_size_75=$((video_size * 75 / 100))
	video_size_50=$((video_size * 50 / 100))
	_filename=$(echo "${filename}" | sed -e 's/h264/x265/g' -e 's/x264/x265/g' -e 's/AVC/x265/g' -e 's/XviD/x265/g')
	echo -e "${video} // ${video_codec} // ${video_height} // ${video_size}"
}

# Extract subtitles. Tries other formats if possible. Uses .sup as last option
function extract_subtitles() {
	for subtitle in ${sub_indexes}; do
		nice -n 18 ffmpeg -hide_banner -loglevel error -n -threads 4 -i "${video}" -map "0:${subtitle}" "${d}/${_filename}_${subtitle}.srt" ||
			nice -n 18 ffmpeg -hide_banner -loglevel error -n -threads 4 -i "${video}" -map "0:${subtitle}" "${d}/${_filename}_${subtitle}.vtt" ||
			nice -n 18 ffmpeg -hide_banner -loglevel error -n -threads 4 -i "${video}" -map "0:${subtitle}" "${d}/${_filename}_${subtitle}.ass" ||
			nice -n 18 ffmpeg -hide_banner -loglevel error -n -threads 4 -i "${video}" -map "0:${subtitle}" -c copy "${d}/${_filename}_${subtitle}.sup"
	done
}

# Use VAAPI to transcode video into memory then move it back to disk
function convert_video_vappi_memory() {
	nice -n 19 ffmpeg -hide_banner -loglevel quiet -y -threads 4 -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -analyzeduration 20000000 -probesize 20000000 \
		-i "${video}" -map 0:v -map 0:a -map 0:s? -map 0:d? -map 0:t? -c:s copy -c:a copy \
		-vf 'scale_vaapi=format=p010,scale_vaapi=w=1920:-2' -c:v hevc_vaapi -profile:v main10 \
		-max_muxing_queue_size 1024 -movflags +faststart -movflags use_metadata_tags "/dev/shm/${_filename}.mkv" || exit 1
	mv -vu "/dev/shm/${_filename}" "${d}/${_filename}" || rm -f "/dev/shm/${_filename}.mkv"
	file_size=$(stat -c%s "${d}/${_filename}.mkv")
	# To account for the space space savings of being converted
	if ((file_size >= video_size_50)); then
		cleanup
	fi
}

# Use VAAPI to transcode video
function convert_video_vaapi() {
	nice -n 19 ffmpeg -hide_banner -loglevel quiet -y -threads 4 -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -analyzeduration 20000000 -probesize 20000000 \
		-i "${video}" -map 0:v -map 0:a -map 0:s? -map 0:d? -map 0:t? -c:s copy -c:a copy \
		-vf 'scale_vaapi=format=p010,scale_vaapi=w=1920:-2' -c:v hevc_vaapi -profile:v main10 \
		-max_muxing_queue_size 1024 -movflags +faststart -movflags use_metadata_tags "${d}/${_filename}.mkv" || exit 1
	file_size=$(stat -c%s "${d}/${_filename}.mkv")
	# To account for the space space savings of being converted
	if ((file_size >= video_size_50)); then
		cleanup
	fi
}

# Use Quick Sync to transcode video into memory then move it back to disk
function convert_video_qsv_memory() {
	nice -n 19 ~/Downloads/ffmpeg/ffmpeg -hide_banner -loglevel quiet -y -threads 4 -hwaccel qsv -hwaccel_output_format qsv -analyzeduration 20000000 -probesize 20000000 \
		-i "${video}" -map 0:v -map 0:a -map 0:s? -map 0:d? -map 0:t? -c:s copy -c:a copy \
		-c:v hevc_qsv -low_power false -preset 4 -profile:v 1 -scenario 3 -look_ahead 1 -global_quality 20 \
		-max_muxing_queue_size 1024 -movflags +faststart -movflags use_metadata_tags "/dev/shm/${_filename}.mkv" || exit 1
	mv -vu "/dev/shm/${_filename}" "${d}/${_filename}" || rm -f "/dev/shm/${_filename}.mkv"
	file_size=$(stat -c%s "${d}/${_filename}.mkv")
	# To account for the space space savings of being converted
	if ((file_size >= video_size_50)); then
		cleanup
	fi
}

# Use Quick Sync to transcode video
function convert_video_qsv() {
	nice -n 19 ~/Downloads/ffmpeg/ffmpeg -hide_banner -loglevel quiet -y -threads 4 -hwaccel qsv -hwaccel_output_format qsv -analyzeduration 20000000 -probesize 20000000 \
		-i "${video}" -map 0:v -map 0:a -map 0:s? -map 0:d? -map 0:t? -c:s copy -c:a copy \
		-c:v hevc_qsv -low_power false -preset 4 -profile:v 1 -scenario 3 -look_ahead 1 -global_quality 20 \
		-max_muxing_queue_size 1024 -movflags +faststart -movflags use_metadata_tags "${d}/$_filename.mkv" || exit 1
	file_size=$(stat -c%s "${d}/${_filename}.mkv")
	# To account for the space space savings of being converted
	if ((file_size >= video_size_50)); then
		cleanup
	fi
}

# Remux video to mp4 while dropping upsupported codecs like FLAC, OPUS, etc. You can end up with files that have no audio with this option
function remux_video_drop_unsupported() {
	nice -n 19 ffmpeg -hide_banner -loglevel quiet -y -threads 4 -i "${video}" -c: copy -movflags +faststart -movflags use_metadata_tags "${d}/${_filename}.mp4" || exit 1
	extract_subtitles
	file_size=$(stat -c%s "${d}/${_filename}.mp4")
	# To account for the loss of audio that is unsupported
	if ((file_size >= video_size_75)); then
		cleanup
	fi
}

# Remux the video file to mp4 cotainers. Most failures are caused by audio that can not be stored in a mp4 container. So this will transcode audio to AAC when needed.
function remux_video() {
	nice -n 19 ffmpeg -hide_banner -loglevel quiet -y -threads 4 -i "${video}" -map 0:v -map 0:a -c: copy -movflags +faststart -movflags use_metadata_tags "${d}/${_filename}.mp4" ||
		nice -n 19 ~/Downloads/ffmpeg/ffmpeg -hide_banner -loglevel quiet -y -threads 4 -i "${video}" -map 0:v -map 0:a -c:v copy \
			-c:a libfdk_aac -b:a 384k -movflags +faststart -movflags use_metadata_tags "${d}/${_filename}.mp4" || exit 1
	file_size=$(stat -c%s "${d}/${_filename}.mp4")
	if ((file_size >= video_size_75)); then
		cleanup
	fi
}

# Cleans up the leftovers
function cleanup() {
	rm -vf "${video}" "${video}.json"
	find "${d}" -size -1k -delete
}

for video; do
	getinfo
	[[ ${video_codec} =~ "av1" ]] && exit
	[[ ${video_codec} =~ "hevc" ]] || convert_video_qsv
	[[ ${video_codec} =~ "hevc" ]] && extract_subtitles
	[[ ${video_codec} =~ "hevc" ]] && remux_video
done