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some ys optimizations

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Luxferre
2026-05-26 19:38:06 +03:00
parent 43a3d03d9b
commit 0494e2aa3c
1 changed files with 15 additions and 20 deletions
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+15 -20
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@@ -1,43 +1,38 @@
#!/usr/bin/env bash
# YouStore: convert any set of files/dirs into a video file
# that's also (somewhat) resistant to re-encoding
# Usage: ys [e|d] [vidfile] [path...] [path...]
# Dependencies: tar, zstd, truncate (coreutils), xpar, openssl, ffmpeg
# that can be resistant to re-encoding
# Usage: ys [e|d] [vidfile.webm] [path...] [path...]
# Dependencies: tar, zstd, truncate/wc (coreutils), xpar, openssl, ffmpeg
# Created by Luxferre in 2026, released into the public domain
BASEW=320 # base frame width
BASEH=180 # base frame height
SCL=4 # frame scale factor
FR=60 # frame rate in the output video
CODEC_PARAMS='-c:v libvpx-vp9 -lossless 1 -deadline realtime -speed 8 -row-mt 1 -aq-mode 0 -pix_fmt yuv420p -f webm'
BPF=$(( BASEW * BASEH / 8 )) # bytes per frame
if [[ "$1" = "e" ]]; then
OUTFILE="$2"
shift
shift
ARCHFILE="$(mktemp -u)"
PARFILE="$(mktemp -u)"
ENCFILE="$(mktemp -u)"
echo "Compressing..."
tar --use-compress-program='zstd -19' -cf "$ARCHFILE" -- $*
echo "Encrypting..."
echo "Compressing and encrypting..."
[[ -z "$YS_PASS" ]] && read -rs -p 'Password: ' YS_PASS
openssl aes-256-cbc -e -pbkdf2 -in "$ARCHFILE" -out "$ENCFILE" -pass "pass:$YS_PASS"
tar --use-compress-program='zstd -T0 -10' -cf - -- $* | \
openssl aes-256-cbc -e -pbkdf2 -out "$ENCFILE" -pass "pass:$YS_PASS"
echo "Adding redundancy..."
xpar -Je -i 3 -H blake2b "$ENCFILE" "$PARFILE"
truncate -s $(( ( $(stat -c%s "$PARFILE") + BPF - 1 ) / BPF * BPF )) "$PARFILE"
truncate -s $(( ( $(wc -c < "$PARFILE") + 7199 ) / 7200 * 7200 )) "$PARFILE"
echo "Encoding video..."
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"
rm -f "$ARCHFILE" "$PARFILE" "$ENCFILE"
ffmpeg -hide_banner -f rawvideo -pixel_format monob -video_size 320x180 -framerate 60 \
-i "$PARFILE" -vf "scale=1280:720:flags=neighbor,format=monob" \
-c:v libvpx-vp9 -lossless 1 -deadline realtime -speed 8 -row-mt 1 -aq-mode 0 \
-pix_fmt yuv420p -f webm "${OUTFILE}"
rm -f "$PARFILE" "$ENCFILE"
echo "Done!"
elif [[ "$1" = "d" ]]; then
PARFILE="$(mktemp -u)"
echo "Decoding video..."
ffmpeg -hide_banner -i "$2" -vf "scale=${BASEW}:${BASEH}:flags=neighbor,format=monob" -f rawvideo "$PARFILE"
ffmpeg -hide_banner -i "$2" -vf "scale=320:180:flags=neighbor,format=monob" -f rawvideo "$PARFILE"
echo "Restoring, decrypting and decompressing..."
[[ -z "$YS_PASS" ]] && read -rs -p 'Password: ' YS_PASS
xpar -Jdc "$PARFILE" | openssl aes-256-cbc -d -pbkdf2 -pass "pass:$YS_PASS" | tar --use-compress-program='zstd' -xf -
xpar -Jdc "$PARFILE" | openssl aes-256-cbc -d -pbkdf2 -pass "pass:$YS_PASS" \
| tar --use-compress-program='zstd -T0' -xf -
rm -f "$PARFILE"
echo "Done!"
else