61 lines
2.1 KiB
Bash
Executable File
61 lines
2.1 KiB
Bash
Executable File
#!/usr/bin/env zsh
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# Cut a clip from a video
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setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
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zmodload zsh/zutil
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local -a o_help=()
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local -a o_from=()
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local -a o_to=()
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local -a o_vencoder=()
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local -a o_aencoder=()
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local -a o_hardcode_subs=()
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zparseopts -D -K -- h=o_help -help=o_help -from:=o_from -to:=o_to \
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-vencoder:=o_vencoder -aencoder:=o_aencoder \
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-hardcode-subs:=o_hardcode_subs
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if [[ ${#o_help} -ne 0 || ! -v 2 || ${#o_from} -ne 2 || ${#o_to} -ne 2 ]]; then
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local ret=$(( ${#o_help} ^ 1 ))
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print -u $(( 1 + ${ret} )) "usage: ${0} [-h|--help]" \
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"--from <HH:MM:SS.MMM> --to <HH:MM:SS.MMM>" \
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"[--vencoder <ENCODER>] [--aencoder <ENCODER>]" \
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"[--hardcode-subs <NUM>] <INPUT FILE> <OUTPUT FILE> [FFMPEG OPTIONS]"
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print "\e[3myou can set bitrates with -b:v and -b:a in FFMPEG OPTIONS." \
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"the -vn / -an / -sn / -dn options can be used to skip inclusion of" \
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"video, audio, subtitle and data streams respectively." \
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"use -s WIDTHxHEIGHT to scale." \
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"for x264, use -crf 18 and -tune {animation,film,…}"
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print "Visit <https://trac.ffmpeg.org/wiki#Encoding> for tips\e[0m"
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return ${ret}
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fi
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local input=${1}
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shift
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local output=${1}
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shift
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local ffmpeg_options=(${@})
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local from=${o_from[2]}
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local to=${o_to[2]}
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local vencoder="copy"
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local aencoder="copy"
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[[ ${#o_vencoder} -eq 2 ]] && vencoder=${o_vencoder[2]}
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[[ ${#o_aencoder} -eq 2 ]] && aencoder=${o_aencoder[2]}
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local subnumber=0
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[[ ${#o_hardcode_subs} -eq 2 ]] && subnumber=${o_hardcode_subs[2]}
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local subtitle_options=(-codec:s copy)
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local compat_options=(-pix_fmt yuv420p) # Android doesn't like yuv420p10le
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# extract subtitles
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if [[ ${#o_hardcode_subs} -ne 0 ]]; then
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local tmpass=$(mktemp --suffix='.cutvid.ass')
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ffmpeg -i ${input} -map 0:s:${subnumber} -y ${tmpass}
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subtitle_options=(-sn -vf ass=${tmpass} )
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fi
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ffmpeg -i ${input} \
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-ss ${from} -to ${to} \
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-codec:v ${vencoder} -codec:a ${aencoder} ${subtitle_options} \
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-preset slower \
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${compat_options} ${ffmpeg_options} ${output}
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[[ ${#o_hardcode_subs} -ne 0 ]] && rm --verbose ${tmpass}
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