46 lines
1.9 KiB
Bash
46 lines
1.9 KiB
Bash
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#!/usr/bin/env bash
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# YouStore: convert any set of files/dirs into a video file
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# that's also (somewhat) resistant to re-encoding
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# Usage: ys [e|d] [vidfile] [path...] [path...]
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# Dependencies: tar, zstd, truncate (coreutils), xpar, openssl, ffmpeg
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# Created by Luxferre in 2026, released into the public domain
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BASEW=320 # base frame width
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BASEH=180 # base frame height
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SCL=4 # frame scale factor
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FR=60 # frame rate in the output video
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CODEC_PARAMS='-c:v libvpx-vp9 -lossless 1 -deadline realtime -speed 8 -row-mt 1 -aq-mode 0 -pix_fmt yuv420p -f webm'
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BPF=$(( BASEW * BASEH / 8 )) # bytes per frame
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if [[ "$1" = "e" ]]; then
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OUTFILE="$2"
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shift
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shift
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ARCHFILE="$(mktemp -u)"
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PARFILE="$(mktemp -u)"
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ENCFILE="$(mktemp -u)"
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echo "Compressing..."
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tar --use-compress-program='zstd -19' -cf "$ARCHFILE" -- $*
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echo "Encrypting..."
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[[ -z "$YS_PASS" ]] && read -rs -p 'Password: ' YS_PASS
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openssl aes-256-cbc -e -pbkdf2 -in "$ARCHFILE" -out "$ENCFILE" -pass "pass:$YS_PASS"
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echo "Adding redundancy..."
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xpar -Je -i 3 -H blake2b "$ENCFILE" "$PARFILE"
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truncate -s $(( ( $(stat -c%s "$PARFILE") + BPF - 1 ) / BPF * BPF )) "$PARFILE"
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echo "Encoding video..."
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ffmpeg -hide_banner -f rawvideo -pixel_format monob -video_size ${BASEW}x${BASEH} -framerate $FR -i "$PARFILE" -vf "scale=iw*${SCL}:ih*${SCL}:flags=neighbor,format=monob" $CODEC_PARAMS "${OUTFILE}.webm"
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rm -f "$ARCHFILE" "$PARFILE" "$ENCFILE"
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echo "Done!"
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elif [[ "$1" = "d" ]]; then
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PARFILE="$(mktemp -u)"
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echo "Decoding video..."
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ffmpeg -hide_banner -i "$2" -vf "scale=${BASEW}:${BASEH}:flags=neighbor,format=monob" -f rawvideo "$PARFILE"
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echo "Restoring, decrypting and decompressing..."
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[[ -z "$YS_PASS" ]] && read -rs -p 'Password: ' YS_PASS
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xpar -Jdc "$PARFILE" | openssl aes-256-cbc -d -pbkdf2 -pass "pass:$YS_PASS" | tar --use-compress-program='zstd' -xf -
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rm -f "$PARFILE"
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echo "Done!"
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else
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echo "Invalid mode! Use e or d"
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fi
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