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#!/bin/bash | |
# Anh Nguyen <anh.ng8@gmail.com> | |
# 2016-04-30 | |
# MIT License | |
# This script takes in same-size images from a folder and make a crossfade video from the images using ffmpeg. | |
# Make sure you have ffmpeg installed before running. | |
# The output command looks something like the below, but for as many images as you have in the folder. | |
# See the answer by LordNeckbeard at: | |
# http://superuser.com/questions/833232/create-video-with-5-images-with-fadein-out-effect-in-ffmpeg/1071748#1071748 | |
# | |
# | |
# ffmpeg \ | |
# -loop 1 -t 1 -i 001.png \ | |
# -loop 1 -t 1 -i 002.png \ | |
# -loop 1 -t 1 -i 003.png \ | |
# -loop 1 -t 1 -i 004.png \ | |
# -loop 1 -t 1 -i 005.png \ | |
# -filter_complex \ | |
# "[1:v][0:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b1v]; \ | |
# [2:v][1:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b2v]; \ | |
# [3:v][2:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b3v]; \ | |
# [4:v][3:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b4v]; \ | |
# [0:v][b1v][1:v][b2v][2:v][b3v][3:v][b4v][4:v]concat=n=9:v=1:a=0,format=yuv420p[v]" -map "[v]" out.mp4 | |
#---------------------------------------------------------------- | |
# SETTINGS | |
input_dir="/path/to/your/folder" # Replace this by a path to your folder /path/to/your/folder | |
n_files=10 # Replace this by a number of images | |
files=`ls ${input_dir}/*.jpg | head -${n_files}` # Change the file type to the correct type of your images | |
output_file="video.mp4" # Name of output video | |
crossfade=0.9 # Crossfade duration between two images | |
#---------------------------------------------------------------- | |
# Making an ffmpeg script... | |
input="" | |
filters="" | |
output="[0:v]" | |
i=0 | |
for f in ${files}; do | |
input+=" -loop 1 -t 1 -i $f" | |
next=$((i+1)) | |
if [ "${i}" -ne "$((n_files-1))" ]; then | |
filters+=" [${next}:v][${i}:v]blend=all_expr='A*(if(gte(T,${crossfade}),1,T/${crossfade}))+B*(1-(if(gte(T,${crossfade}),1,T/${crossfade})))'[b${next}v];" | |
fi | |
if [ "${i}" -gt "0" ]; then | |
output+="[b${i}v][${i}:v]" | |
fi | |
i=$((i+1)) | |
done | |
output+="concat=n=$((i * 2 - 1)):v=1:a=0,format=yuv420p[v]\" -map \"[v]\" ${output_file}" | |
script="ffmpeg ${input} -filter_complex \"${filters} ${output}" | |
echo ${script} | |
# Run it | |
eval "${script}" |
thanks for the work @anguyen8 and @rossomaltese i have been trying both your versions and have ended up with 0MB .mp4s unfortunately... although a simple slideshow with ffmpeg like
ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' -c:v libx264 -r 30 -pix_fmt yuv420p output.mp4
worked perfectly... any hints/ideas where the error could lie? :/
I retried executing the updated version and worked for me.
Two hints:
- pictures must have the same dimensions (width and height)
- there must not be blanks in the files name (or double quote each occurrence of variable
files
in the script).
Also, please take care of @martin3000 comment.
For the ones who asked for adding a soundtrack, I did using something like that:
ffmpeg -i output_from_the_script.mp4 -itsoffset 00:00:17 -i soundtrack.mp3 -c copy -map 0:v:0 -map 1:a:0 output_with_sound.mp4
-itsoffset
is the time at which soundtrack must start playing.
HTH
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thanks for the work @anguyen8 and @rossomaltese
i have been trying both your versions and have ended up with 0MB .mp4s unfortunately... although a simple slideshow with ffmpeg like
ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' -c:v libx264 -r 30 -pix_fmt yuv420p output.mp4
worked perfectly...
any hints/ideas where the error could lie? :/