Monorepo for Aesthetic.Computer
aesthetic.computer
recap/bin/compose.fish: -preset ultrafast for the oven encode
The 139-deep movie= subtitle overlay filter graph saturates a single
ffmpeg thread (1 core fully consumed, output file stalled at the
filter-init phase on the oven). Dropping libx264 from medium → ultrafast
trades ~2x file size for ~10x encode time. CRF 22 keeps quality
acceptable for 1080×1920 vertical reels. Without this the oven encode
projects to 5+ hours; with it, ~5 min.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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recap/bin/compose.fish
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recap/bin/compose.fish
···
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set -l OUT $ROOT/out
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set -l TOTAL (cat $OUT/duration.txt)
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set -l AUDIO $OUT/recap.mp3
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set -l WALTZ $OUT/waltz.mp3
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set -l VIDEO $OUT/recap.mp4
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set -l FILTER $OUT/filter.txt
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···
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# chunk without fish escape gymnastics around brackets and quotes.
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node $ROOT/bin/build-filter.mjs $TOTAL > $FILTER
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ffmpeg -hide_banner -y \
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-f concat -safe 0 -i $OUT/concat.txt \
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-i $AUDIO \
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-filter_complex_script $FILTER \
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-map "[final]" -map "[a1]" \
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-c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p \
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-c:a aac -b:a 192k \
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-movflags +faststart \
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-t $TOTAL \
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$VIDEO
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# If a piano-waltz bed exists, append a mix into the same filter graph so
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# we don't need a second -filter_complex flag (only the last one wins).
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# The waltz is already gain-staged by waltz.mjs (audience.waltz.voiceGain);
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# we still clamp it lightly here so it sits well under the spoken track.
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if test -f $WALTZ
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echo " + bed: $WALTZ (waltz)"
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# printf — fish parses $TOTAL[bed] as a slice index; %s sidesteps that.
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# NOTE: rely on `-stream_loop -1` at the input level for looping; do NOT
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# also use `aloop=loop=-1:size=2e9` — that allocates a 2-billion-sample
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# buffer (~24 GB worst case) which OOMs on the 8 GB machine.
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# `atrim=duration=$TOTAL` is enough to cut the looped stream at length.
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printf ';[2:a]volume=0.42,atrim=duration=%s[bed];[a1][bed]amix=inputs=2:duration=first:dropout_transition=0:weights=1.0 0.55[mix]\n' "$TOTAL" >> $FILTER
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ffmpeg -hide_banner -y \
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-f concat -safe 0 -i $OUT/concat.txt \
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-i $AUDIO \
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-stream_loop -1 -i $WALTZ \
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-filter_complex_script $FILTER \
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-map "[final]" -map "[mix]" \
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-c:v h264_videotoolbox -b:v 5M -pix_fmt yuv420p \
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-c:a aac -b:a 192k \
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-movflags +faststart \
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-t $TOTAL \
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$VIDEO
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else
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ffmpeg -hide_banner -y \
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-f concat -safe 0 -i $OUT/concat.txt \
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-i $AUDIO \
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-filter_complex_script $FILTER \
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-map "[final]" -map "[a1]" \
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-c:v h264_videotoolbox -b:v 5M -pix_fmt yuv420p \
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-c:a aac -b:a 192k \
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-movflags +faststart \
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-t $TOTAL \
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$VIDEO
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end
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echo "✓ $VIDEO"