299 lines
10 KiB
Bash
299 lines
10 KiB
Bash
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cite about-plugin
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about-plugin 'video to gif, gif to WebM helper functions'
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# Based loosely on:
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# https://gist.github.com/SlexAxton/4989674#comment-1199058
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# https://linustechtips.com/main/topic/343253-tutorial-convert-videogifs-to-webm/
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# and other sources
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# Renamed gifify to v2gif to go avoid clobbering https://github.com/jclem/gifify
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# Requirements (Mac OS X using Homebrew): brew install ffmpeg giflossy imagemagick
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# Requirements on Ubuntu: sudo apt install ffmpeg imagemagick ; plus install https://github.com/pornel/giflossy
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# Optional: install mediainfo for autodetection of original video FPS.
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# Optional: if lossy is not important, Ubuntu has gifsicle packaged for apt-get, instead of giflossy
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# Optional: gifski (from `brew install gifski` or github.com/ImageOptim/gifski)
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# for high quality huge files.
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function v2gif {
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about 'Converts a .mov/.avi/.mp4 file into an into an animated GIF.'
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group 'gif'
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param '1: MOV/AVI/MP4 file name(s)'
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param '2: -w <num> ; Optional: max width in pixels'
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param '3: -l <num> ; Optional: extra lossy level for smaller files (80-200 make sense, needs giflossy instead of gifsicle)'
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param '4: -h ; Optional: high quality using gifski (installed seperately) - overrides "--lossy" above!'
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param '5: -d ; Optional: delete the original video file if succeeded'
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param '6: -t ; Optional: Tag the result with quality stamp for comparison use'
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param '7: -f <num> ; Optional: Change number of frames per second (default 10 or original FPS if mediainfo installed)'
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param '8: -a <num> ; Optional: Alert if resulting file is over <num> kilobytes (default is 5000, 0 turns off)'
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param '9: -m ; Optional: Also create a WebM file (will one day replace GIF, Smaller and higher quality than mp4)'
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example '$ v2gif foo.mov'
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example '$ v2gif foo.mov -w 600'
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example '$ v2gif -l 100 -d *.mp4'
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example '$ v2gif -dh *.avi'
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example '$ v2gif -thw 600 *.avi *.mov'
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local convert=$(which convert) ; [[ -x "$convert" ]] || { echo "No convert found!" ; return 2 ;}
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local ffmpeg=$(which ffmpeg) ; [[ -x "$ffmpeg" ]] || { echo "No ffmpeg found!" ; return 2 ;}
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local mediainfo=$(which mediainfo) ; [[ -x "$mediainfo" ]] || { echo "No mediainfo found!" ; return 2 ;}
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local gifsicle=$(which gifsicle) ; [[ -x "$gifsicle" ]] || { echo "No gifsicle found!" ; return 2 ;}
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local getopt=$(which getopt)
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if [[ "$OSTYPE" == "darwin"* ]] ; then
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# Getopt on BSD is incompatible with GNU
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getopt=/usr/local/opt/gnu-getopt/bin/getopt
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[[ -x "$getopt" ]] || { echo "No GNU-getopt found!" ; return 2 ;}
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fi
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# Parse the options
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local args=$($getopt -l "alert:" -l "lossy:" -l "width:" -l del,delete -l high -l tag -l "fps:" -l webm -o "a:l:w:f:dhmt" -- "$@")
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if [ $? -ne 0 ]; then
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echo 'Terminating...' >&2
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return 2
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fi
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eval set -- "$args"
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local use_gifski=""
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local opt_del_after=""
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local maxsize=""
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local lossiness=""
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local maxwidthski=""
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local giftagopt=""
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local giftag=""
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local defaultfps=10
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local infps=""
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local fps=""
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local make_webm=""
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local alert=5000
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while [ $# -ge 1 ]; do
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case "$1" in
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--)
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# No more options left.
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shift
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break
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;;
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-d|--del|--delete)
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# Delete after
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opt_del_after="true"
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shift
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;;
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-h|--high)
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#High Quality, use gifski
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local gifski=$(which gifski) ; [[ -x "$gifski" ]] || { echo "No gifski found!" ; return 2 ; }
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use_gifski=true
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giftag="${giftag}-h"
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shift
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;;
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-w|--width)
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maxsize="-vf scale=$2:-1"
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maxwidthski="-W $2"
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giftag="${giftag}-w$2"
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shift 2
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;;
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-t|--tag)
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# mark with a quality tag
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giftagopt="true"
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shift
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;;
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-l|--lossy)
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# Use giflossy parameter
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lossiness="--lossy=$2"
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giftag="${giftag}-l$2"
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shift 2
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;;
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-f|--fps)
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# select fps
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infps="$2"
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giftag="${giftag}-f$2"
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shift 2
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;;
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-a|--alert)
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# set size alert
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alert="$2"
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shift 2
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;;
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-m|--webm)
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# set size alert
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make_webm="true"
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shift
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;;
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esac
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done
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if [[ -z "$*" ]]; then
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echo "$(tput setaf 1)No input files given. Example: v2gif file [file...] [-w <max width (pixels)>] [-l <lossy level>] $(tput sgr 0)"
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echo "-d/--del/--delete Delete original vid if done suceessfully (and file not over the size limit)"
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echo "-h/--high High Quality - use Gifski instead of gifsicle"
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echo "-w/--width N Lock maximum gif width to N pixels, resize if necessary"
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echo "-t/--tag Add a tag to the output gif describing the options used (useful for comparing several options)"
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echo "-l/--lossy N Use the Giflossy parameter for gifsicle (If your version supports it)"
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echo "-f/--fps N Override autodetection of incoming vid FPS (useful for downsampling)"
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echo "-a/--alert N Alert if over N kilobytes (Defaults to 5000)"
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echo "-m/--webm Also create a webm file"
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return 1
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fi
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# Prepare the quality tag if requested.
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[[ -z "$giftag" ]] && giftag="-default"
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[[ -z "$giftagopt" ]] && giftag=""
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for file ; do
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local output_file="${file%.*}${giftag}.gif"
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local del_after=$opt_del_after
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if [[ "$make_webm" ]] ; then
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$ffmpeg -loglevel panic -i "$file" \
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-c:v libvpx -crf 4 -threads 0 -an -b:v 2M -auto-alt-ref 0 \
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-quality best -loop 0 "${file%.*}.webm" || return 2
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fi
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# Set FPS to match the video if possible, otherwise fallback to default.
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if [[ "$infps" ]] ; then
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fps=$infps
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else
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fps=$defaultfps
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if [[ -x $mediainfo ]] ; then
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fps=$($mediainfo "$file" | grep "Frame rate " |sed 's/.*: \([0-9.]\+\) .*/\1/' | head -1)
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[[ -z "$fps" ]] && fps=$($mediainfo "$file" | grep "Minimum frame rate" |sed 's/.*: \([0-9.]\+\) .*/\1/' | head -1)
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fi
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fi
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echo "$(tput setaf 2)Creating '$output_file' at $fps FPS ...$(tput sgr 0)"
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if [[ "$use_gifski" = "true" ]] ; then
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# I trust @pornel to do his own resizing optimization choices
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$ffmpeg -loglevel panic -i "$file" -r $fps -vcodec png v2gif-tmp-%05d.png && \
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$gifski v2gif-tmp-*.png $maxwidthski --fps $(printf "%.0f" $fps) -o "$output_file" || return 2
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else
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$ffmpeg -loglevel panic -i "$file" $maxsize -r $fps -vcodec png v2gif-tmp-%05d.png && \
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$convert +dither -layers Optimize v2gif-tmp-*.png GIF:- | \
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$gifsicle $lossiness --no-warnings --colors 256 --delay=$(echo "100/$fps"|bc) --loop --optimize=3 --multifile - > "$output_file" || return 2
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fi
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rm v2gif-tmp-*.png
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# Checking if the file is bigger than Twitter likes and warn
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if [[ $alert -gt 0 ]] ; then
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local out_size=$(wc --bytes < "$output_file")
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if [[ $out_size -gt $(( alert * 1000 )) ]] ; then
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echo "$(tput setaf 3)Warning: '$output_file' is $((out_size/1000))kb.$(tput sgr 0)"
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[[ "$del_after" == "true" ]] && echo "$(tput setaf 3)Warning: Keeping '$file' even though --del requested.$(tput sgr 0)"
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del_after=""
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fi
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fi
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[[ "$del_after" = "true" ]] && rm "$file"
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done
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echo "$(tput setaf 2)Done.$(tput sgr 0)"
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}
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function any2webm() {
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about 'Converts an movies and Animated GIF files into an into a modern quality WebM video.'
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group 'gif'
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param '1: GIF/video file name(s)'
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param '2: -s <WxH> ; Optional: set <W>idth and <H>eight in pixels'
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param '3: -d ; Optional: delete the original file if succeeded'
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param '4: -t ; Optional: Tag the result with quality stamp for comparison use'
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param '5: -f <num> ; Optional: Change number of frames per second'
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param '6: -b <num> ; Optional: Set Bandwidth (quality/size of resulting file), Defaults to 2M (bits/sec, accepts fractions)"'
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param '7: -a <num> ; Optional: Alert if resulting file is over <num> kilobytes (default is 5000, 0 turns off)'
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example '$ any2webm foo.gif'
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example '$ any2webm *.mov -b 1.5M -s 600x480'
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# Parse the options
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local args=$(getopt -l alert -l "bandwidth:" -l "width:" -l del,delete -l tag -l "fps:" -l webm -o "a:b:w:f:dt" -- "$@")
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if [ $? -ne 0 ]; then
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echo 'Terminating...' >&2
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return 2
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fi
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eval set -- "$args"
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local opt_del_after=""
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local size=""
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local webmtagopt=""
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local webmtag=""
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local defaultfps=10
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local fps=""
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local bandwidth="2M"
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local alert=5000
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while [ $# -ge 1 ]; do
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case "$1" in
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--)
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# No more options left.
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shift
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break
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;;
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-d|--del|--delete)
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# Delete after
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opt_del_after="true"
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shift
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;;
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-s|--size)
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size="-s $2"
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webmtag="${webmtag}-s$2"
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shift 2
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;;
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-t|--tag)
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# mark with a quality tag
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webmtagopt="true"
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shift
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;;
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-f|--fps)
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# select fps
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fps="-r $2"
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webmtag="${webmtag}-f$2"
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shift 2
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;;
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-b|--bandwidth)
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# select bandwidth
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bandwidth="$2"
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webmtag="${webmtag}-b$2"
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shift 2
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;;
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-a|--alert)
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# set size alert
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alert="$2"
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shift 2
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;;
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esac
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done
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if [[ -z "$*" ]]; then
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echo "$(tput setaf 1)No input files given. Example: any2webm file [file...] [-w <max width (pixels)>] < $(tput sgr 0)"
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return 1
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fi
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# Prepare the quality tag if requested.
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[[ -z "$webmtag" ]] && webmtag="-default"
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[[ -z "$webmtagopt" ]] && webmtag=""
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for file ; do
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local output_file="${file%.*}${webmtag}.webm"
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local del_after=$opt_del_after
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echo "$(tput setaf 2)Creating '$output_file' ...$(tput sgr 0)"
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$ffmpeg -loglevel panic -i "$file" \
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-c:v libvpx -crf 4 -threads 0 -an -b:v $bandwidth -auto-alt-ref 0 \
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-quality best $fps $size -loop 0 -pix_fmt yuva420p "$output_file" || return 2
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# Checking if the file is bigger than Twitter likes and warn
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if [[ $alert -gt 0 ]] ; then
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local out_size=$(wc --bytes < "$output_file")
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if [[ $out_size -gt $(( alert * 1000 )) ]] ; then
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echo "$(tput setaf 3)Warning: '$output_file' is $((out_size/1000))kb.$(tput sgr 0)"
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[[ "$del_after" == "true" ]] && echo "$(tput setaf 3)Warning: Keeping '$file' even though --del requested.$(tput sgr 0)"
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del_after=""
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fi
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fi
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[[ "$del_after" = "true" ]] && rm "$file"
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done
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echo "$(tput setaf 2)Done.$(tput sgr 0)"
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}
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