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commit 494d1679d5f3957e473992a6e7f4a13325cb2735
parent ce1be2e37e016beb00f57af2b374730aab1fb70b
Author: Luke Smith <luke@lukesmith.xyz>
Date:   Sun,  1 Nov 2020 20:38:23 -0500

slider, to make image/meme slideshow video

Diffstat:
A.local/bin/slider | 69+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+), 0 deletions(-)

diff --git a/.local/bin/slider b/.local/bin/slider @@ -0,0 +1,69 @@ +#!/bin/sh + +# Give a file with images and timecodes and creates a video slideshow of them. +# +# Timecodes must be in format 00:00:00. +# +# Imagemagick and ffmpeg required. + +# TODO: +# - add the ability to include text, using imagemagick text to image feature. + + +[ -z "$1" ] && echo "Usage: + first arg: file with timecodes + second arg: audio file (optional)" && exit 1 + +prepdir="$1-src" +prepfile="$prepdir/$1.prep" +outfile="$1.mp4" + +totaldur="$(ffmpeg -i "$2" 2>&1 | awk '/Duration/ {print $2}' | sed s/,//)" +totseconds="$(date '+%s' -d "$totaldur")" + +mkdir -p "$prepdir" + +echo "Preparing images... May take a while depending on the number of files." +{ + +while read -r x; +do + # Get the time from the first column. + time="${x%% *}" + seconds="$(date '+%s' -d "$time")" + # Duration is not used on the first looped item. + duration="$((seconds - prevseconds))" + + # Get the filename from the rest. + filename="${x#* }" + base="$(basename "$filename")" + base="${base%.*}.jpg" + + # Resize and read the image file, but not if already done. + [ ! -f "$prepdir/$base" ] && + convert -size 1920x1080 canvas:black -gravity center "$filename" -resize 1920x1080 -composite "$prepdir/$base" + + # If the first line, do not write yet. + [ "$time" = "00:00:00" ] || echo "file '$prevbase' +duration $duration" + + # Keep the information required for the next file. + prevbase="$base" + prevtime="$time" + prevseconds="$(date '+%s' -d "$prevtime")" +done < "$1" +# Do last file which must be given twice as follows +echo "file '$base' +duration $((totseconds-seconds)) +file '$base'" +} > "$prepfile" + +if [ -f "$2" ]; then + ffmpeg -y -f concat -safe 0 -i "$prepfile" -i "$2" -c:a aac -vsync vfr -c:v libx264 -pix_fmt yuv420p "$outfile" +else + ffmpeg -y -f concat -safe 0 -i "$prepfile" -vsync vfr -c:v libx264 -pix_fmt yuv420p "$outfile" +fi + +# Might also try: +# -vf "fps=${fps:-24},format=yuv420p" "$outfile" +# but has given some problems.