2021-07-29 00:37:35 -07:00
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#!/usr/bin/env zsh
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# YES_ZSH
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2021-07-29 05:44:12 -07:00
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# NO_BASH
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# NO_DASH
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2021-07-29 00:37:35 -07:00
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2021-07-30 19:41:16 -07:00
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cutv() { ### @-
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2021-08-01 08:28:21 -07:00
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### (WIP) create a short clip of a long video file.
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argc -ge 2 "$0" "$@" || return
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argc -le 4 "$0" "$@" || return
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2021-07-29 00:37:35 -07:00
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local nel="${1?missing length parameter}"
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local f="${2?missing file parameter}"
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local g="cut."${${f##*/}%.*}".mp4"
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ffmpeg -hide_banner -i "$f" 2>&1 \
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| grep Duration \
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| grep -Eo '[0-9][0-9]:[0-9][0-9]:[0-9][0-9].[0-9][0-9]' | awk -F: '{print (($1*60+$2)*60+$3)+$4/100}' | read len
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2021-08-01 08:28:21 -07:00
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[ "$len" -gt 0 ] || return 1
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2021-07-29 00:37:35 -07:00
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echo "$g"
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ffmpeg \
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-hide_banner -loglevel warning -stats -stats_period 5 \
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-i "$f" -ss "$(((nel<len)*(len-nel)))" \
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-sn -dn -metadata = -map_chapters -1 -movflags +faststart \
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-ar 44100 -acodec libfdk_aac -b:a 256k -cutoff 20000 -af alimiter=level_in=2.5:level_out=0.9 \
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-maxrate 7680k -bufsize 9600k -vcodec libx264 -preset medium -crf 21 -vf scale=1280:720 \
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-threads 2 -y "$g" || return 1
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# -maxrate 7680k -bufsize 9600k -vcodec libx264 -preset medium -crf 21 -vf scale=1280:720
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# -maxrate 9600k -bufsize 12000k -vcodec libx264 -preset medium -crf 22 -vf scale=1280:720
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}
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[ "${SOURCING:-0}" -gt 0 ] || cutv "$@"
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