imagemagick convert individual frame delay in gif - bash

Question

I have a directory full of images I want to turn into a gif.
Each file name follows this pattern: <zero_padded_index>_<delay_in_milliseconds>.gif
Example: 00001_1432.gif
I can create the gif animation with imagemagick: convert -loop 0 -delay 10 *.gif out.gif
The problem is, I want each frame to have a different delay based on the second digit in it's name.
convert -delay 0 -loop 0 *.gif output.gif
for gif in *.gif; do
name=${gif%.gif}
index=$(echo ${name%-*} | sed 's/0*//')
delay=${name#*-}
# 1. convert milliseconds to w/e imagemagick -delay uses.
# 2. update the frame at the correct index.
done;
Do I incrementally build up the gif? Or go back and change them after the fact?
My imagemagick chops are not up to par.

Answer 1

So If I was approaching this problem i'd do the following ( If I understand correctly )
Given the following files:
[root#dev7 ~]# ls -lta so/
total 728
drwxr-xr-x 2 root root 4096 Aug 13 18:35 .
dr-xr-x---. 17 root root 4096 Aug 13 18:35 ..
-rw-r--r-- 1 root root 18933 Aug 13 18:23 00007_1432.gif
-rw-r--r-- 1 root root 18594 Aug 13 18:23 00006_1432.gif
-rw-r--r-- 1 root root 18984 Aug 13 18:23 00005_1432.gif
-rw-r--r-- 1 root root 19601 Aug 13 18:23 00004_1444.gif
-rw-r--r-- 1 root root 19408 Aug 13 18:23 00003_1432.gif
-rw-r--r-- 1 root root 18632 Aug 13 18:23 00002_1552.gif
-rw-r--r-- 1 root root 20104 Aug 13 18:23 00001_1432.gif
[root#dev7 ~]#
My script would look like this:
#!/bin/bash -x
# directory of the individual gifs
_dir=/root/so/
# get gifs and make sure your sort them in order
gifs=$(find $_dir -name *.gif|sort|xargs)
# this is going to be the imagemagick command
_CONVERT="convert "
# make sure the list of gifs look correct
echo $gifs
for gif in $gifs; do
# full path of each gif
full_path=$gif
# get just the name of the gif ( originally I was going to use this if everything was happing within the same directory )
name=$(echo ${gif##*/})
#echo -e "\n$name"
# Get the index
index=$(echo ${gif##*/} | cut -d\_ -f1)
#echo -e "\n$index"
# Get the delay of the current image
delay=$(echo ${gif##*/} | cut -d\_ -f2| sed "s,.gif,,")
# echo -e "\n$delay"
# add correct delay options to current gif, append to existing command
_CONVERT="${_CONVERT} -delay $delay $gif "
done;
# add the outpt of where you're going to put your gif
_CONVERT="${_CONVERT} -loop 0 -layers Optimize /root/so/stackoverflow.gif"
# show full command
echo "Convert cmd: $_CONVERT"
# run it, then go get your image
eval $_CONVERT
Example of the command that gets generated:
Convert cmd: convert -delay 1432 /root/so/00001_1432.gif -delay 1552 /root/so/00002_1552.gif -delay 1432 /root/so/00003_1432.gif -delay 1444 /root/so/00004_1444.gif -delay 1432 /root/so/00005_1432.gif -delay 1432 /root/so/00006_1432.gif -delay 1432 /root/so/00007_1432.gif -layers Optimize /root/so/stackoverflow.gif
Hope this is what you're looking for.