31 lines
756 B
Bash
31 lines
756 B
Bash
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#!/bin/bash -x
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set -euo pipefail
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if [ "$#" -ne 5 ]; then
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echo "Invalid number of parameters"
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echo "Usage: compress.sh <input> <fps> <bitrate:v> <bitrate:a/copy> <output>"
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echo "Example: compress.sh foo.mp4 30 1024k 128k bar.mp4"
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exit 1
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fi
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INPUT="$1"
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FPS="$2"
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VBIT="$3"
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ABIT="$4"
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OUTPUT="$5"
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AUDIO=("-c:a" "aac" "-b:a" "$ABIT")
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# Don't murder audio quality with recompress if already appropriate bitrate
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if [ "$ABIT" == "copy" ]; then
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AUDIO=("-c:a" "copy")
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fi
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ffmpeg -y -i "$INPUT" -c:v libx264 -r "$FPS" -preset slow -b:v "$VBIT" -pass 1 -vsync cfr -f null /dev/null && \
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ffmpeg -y -i "$INPUT" -c:v libx264 -r "$FPS" -b:v "$VBIT" -pass 2 "${AUDIO[@]}" -preset slow "$OUTPUT"
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rm ffmpeg2pass-0.log
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rm ffmpeg2pass-0.log.mbtree
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