Find all mpeg2 MKV files in my archive on my NAS, copy to local disk, transcode to h264.

find_mpeg2.sh

for i in *.mkv; do
ffprobe -loglevel quiet -show_format -show_streams -select_streams v -print_format flat=h=0 "$i"  | egrep 'codec_name="mpeg2video"|filename' | cut -d '"' -f 2 | tr '\n' '|'
echo
done | grep mpeg2video | cut -d '|' -f 2 > ~/mpeg2movies.txt

rsync -Pav --size-only --files-from=:/home/davidb/mpeg2movies.txt udun:/data/movies /Volumes/element/incoming

transcode.sh

#!/bin/zsh
IN=/Volumes/element/incoming
OUT=/Volumes/element/done

for i in $IN/*.mkv; do
    oname="$OUT/`basename $i`"
    echo "Processing to $oname"
    if [[ ! -f $oname ]]; then
        ffmpeg -i "$i" -map 0 -c:v libx264 -preset slow -crf 18 -c:a copy -c:s copy "$oname"
    fi
    #rm "$i"
done