renames photos uploaded from smartphone using flickr uploader to numerically ordered file names for ffmpeg.

rename_flickr_photos_for_ffmpeg.sh

#
# preparation:
# download all flickr photo files from a certain album from flickr.
# it may be separated into a few zip files,
# so be sure to expand all of them into the same folder
# move to the image folder

#1. rename jpeg files named like kimg2150_23977558372_o.jpg
# This can be applied to image files with some ordered numbers somewhere in file name.
# (change initial values and substring offsets)
x=1;
for f in *.jpg
do
    foo=${f}
 foo=${foo:4:7}
    mv $f $(printf "%04d.jpg" $x)
    x=$((x+1))
done

#2.  if photos is upside down, rotate them

for f in *.jpg
do
    foo=${f}
 foo=${foo:1:4}
    jpegtran -rotate 180 --copy all $f > $foo.jpeg
done

#3. then make movie
ffmpeg -r 15 -i %04d.jpg -vcodec libx264 -qscale:v 0 video.mp4