127 lines
4.1 KiB
Plaintext
127 lines
4.1 KiB
Plaintext
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#!/bin/sh
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# Give a file with images and timecodes and creates a video slideshow of them.
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#
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# Timecodes must be in format 00:00:00.
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#
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# Imagemagick and ffmpeg required.
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# Application cache if not stated elsewhere.
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cache="${XDG_CACHE_HOME:-$HOME/.cache}/slider"
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while getopts "hvrpi:c:a:o:d:f:t:e:x:" o; do case "${o}" in
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c) bgc="$OPTARG" ;;
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t) fgc="$OPTARG" ;;
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f) font="$OPTARG" ;;
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i) file="$OPTARG" ;;
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a) audio="$OPTARG" ;;
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o) outfile="$OPTARG" ;;
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d) prepdir="$OPTARG" ;;
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r) redo="$OPTARG" ;;
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s) ppt="$OPTARG" ;;
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e) endtime="$OPTARG" ;;
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x) res="$OPTARG"
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echo "$res" | grep -qv "^[0-9]\+x[0-9]\+$" &&
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echo "Resolution must be dimensions separated by a 'x': 1280x720, etc." &&
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exit 1 ;;
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p) echo "Purge old build files in $cache? [y/N]"
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read -r confirm
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echo "$confirm" | grep -iq "^y$" && rm -rf "$cache" && echo "Done."
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exit ;;
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v) verbose=True ;;
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*) echo "$(basename "$0") usage:
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-i input timecode list (required)
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-a audio file
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-c color of background (use html names, black is default)
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-t text color for text slides (white is default)
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-s text font size for text slides (150 is default)
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-f text font for text slides (sans serif is default)
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-o output video file
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-e if no audio given, the time in seconds that the last slide will be shown (5 is default)
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-x resolution (1920x1080 is default)
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-d tmp directory
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-r rerun imagemagick commands even if done previously (in case files or background has changed)
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-p purge old build files instead of running
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-v be verbose" && exit 1
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esac done
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# Check that the input file looks like it should.
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{ head -n 1 "$file" 2>/dev/null | grep -q "^00:00:00 " ;} || {
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echo "Give an input file with -i." &&
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echo "The file should look as this example:
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00:00:00 first_image.jpg
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00:00:03 otherdirectory/next_image.jpg
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00:00:09 this_image_starts_at_9_seconds.jpg
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etc...
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Timecodes and filenames must be separated by Tabs." &&
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exit 1
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}
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if [ -n "${audio+x}" ]; then
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# Check that the audio file looks like an actual audio file.
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case "$(file --dereference --brief --mime-type -- "$audio")" in
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audio/*) ;;
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*) echo "That doesn't look like an audio file."; exit 1 ;;
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esac
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totseconds="$(date '+%s' -d $(ffmpeg -i "$audio" 2>&1 | awk '/Duration/ {print $2}' | sed s/,//))"
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endtime="$((totseconds-seconds))"
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fi
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prepdir="${prepdir:-$cache/$file}"
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outfile="${outfile:-$file.mp4}"
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prepfile="$prepdir/$file.prep"
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[ -n "${verbose+x}" ] && echo "Preparing images... May take a while depending on the number of files."
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mkdir -p "$prepdir"
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{
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while read -r x;
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do
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# Get the time from the first column.
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time="${x%% *}"
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seconds="$(date '+%s' -d "$time")"
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# Duration is not used on the first looped item.
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duration="$((seconds - prevseconds))"
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# Get the filename/text content from the rest.
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content="${x#* }"
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base="$(basename "$content")"
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base="${base%.*}.jpg"
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if [ -f "$content" ]; then
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# If images have already been made in a previous run, do not recreate
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# them unless -r was given.
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{ [ ! -f "$prepdir/$base" ] || [ -n "${redo+x}" ] ;} &&
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convert -size "${res:-1920x1080}" canvas:"${bgc:-black}" -gravity center "$content" -resize 1920x1080 -composite "$prepdir/$base"
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else
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{ [ ! -f "$prepdir/$base" ] || [ -n "${redo+x}" ] ;} &&
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convert -size "${res:-1920x1080}" -background "${bgc:-black}" -fill "${fgc:-white}" -font "${font:-Sans}" -pointsize "${ppt:-150}" -gravity center label:"$content" "$prepdir/$base"
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fi
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# If the first line, do not write yet.
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[ "$time" = "00:00:00" ] || echo "file '$prevbase'
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duration $duration"
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# Keep the information required for the next file.
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prevbase="$base"
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prevtime="$time"
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prevseconds="$(date '+%s' -d "$prevtime")"
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done < "$file"
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# Do last file which must be given twice as follows
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echo "file '$base'
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duration ${endtime:-5}
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file '$base'"
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} > "$prepfile"
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if [ -n "${audio+x}" ]; then
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ffmpeg -hide_banner -y -f concat -safe 0 -i "$prepfile" -i "$audio" -c:a aac -vsync vfr -c:v libx264 -pix_fmt yuv420p "$outfile"
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else
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ffmpeg -hide_banner -y -f concat -safe 0 -i "$prepfile" -vsync vfr -c:v libx264 -pix_fmt yuv420p "$outfile"
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fi
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# Might also try:
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# -vf "fps=${fps:-24},format=yuv420p" "$outfile"
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# but has given some problems.
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