Encoding Discussion Megathread (ffmpeg, Handbrake, AV1, etc...)

[TheDreadPirate]

Here is my progress.  I added functionality to split files if there is a known chapter count per episode.  USUALLY the same.  Also accepts "all" for movies and such or if the MKVs came off the disc as 1 episode per file.

No deinterlacing or cropping.  I am leaning towards letting clients do the deinterlacing for my content going forward.  Still need to get cropping working.

Code:

#!/bin/bash

chaptersEpisode=$1

if [ -z "$chaptersEpisode" ]; then
        echo "Chapters per episode was not provided"
        exit 1
fi

ls *.mkv | while read file; do
        sudo /usr/lib/jellyfin-ffmpeg/ffprobe -i $file -print_format json -show_chapters -loglevel error > chapters.json
        rawChapters=$(jq .chapters[].start_time chapters.json | wc -l)
        totalChapters=$(echo $(($rawChapters - 1)) | bc)
        i=0
        startStop=""
        if [ "$chaptersEpisode" == "all" ]; then
                startStop="0:$totalChapters"
        else
                while [ $i -lt $totalChapters ]; do
                        first=$i
                        last=$(echo $(($i + $chaptersEpisode - 1)) | bc)
                        startStop=$(echo "$startStop $first:$last")
                        i=$(echo $(($i + $chaptersEpisode)) | bc)
                done
        fi
        for chapter in `echo $startStop` ; do
                begin=$(echo $chapter | awk -F ':' '{print $1}')
                end=$(echo $chapter | awk -F ':' '{print $2}')
                startTime=$(jq .chapters[$begin].start_time chapters.json | sed 's/\"//g')
                endTime=$(jq .chapters[$end].start_time chapters.json | sed 's/\"//g')
                sudo /usr/lib/jellyfin-ffmpeg/ffmpeg -init_hw_device vaapi=va:,driver=iHD,kernel_driver=i915 \
                -init_hw_device qsv=qs@va -filter_hw_device qs -hwaccel qsv -hwaccel_output_format qsv \
                -i $file -map 0:v -map 0:a -map 0:s -map_chapters 0 -c:v hevc_qsv -profile main \
                -preset slow -cq 26 -pix_fmt yuv420p -c:a copy -c:s copy -ss $startTime -to $endTime "$file-chapter-$begin-$end.mkv"
        done
done