Bash/MLT : how to load string from file and passing to melt argument

Question

I need to execute the following command :

melt color:"#eeeeee"  -filter dynamictext:"this text"

"this text" is a string from a title.txt file.

I read the file by using this method:

while IFS='' read -r line || [[ -n "$line" ]]; do
     echo $line 
done < "title.txt"

The problem is how to make -filter dynamictext:"this text" in bash loop as string and then finally execute:

melt color:"#eeeeee" $string

I used this code but with no luck so far:

while IFS='' read -r line || [[ -n "$line" ]]; do
   string="$string -filter dynamictext:\"$line\""
done < "title.txt"

melt error : Failed to load "text"

title.txt contains:

this text
second text
anothe text

thank, but doesnt work.. video output : "this and generate error Failed to load "text"" — ujang kelabu, Oct 04 '16 at 09:47
does `"-filter dynamictext:'$line'"` work? (Double quotes on the outside with single quotes on the inside.) — chicks, Oct 04 '16 at 11:33
not work, video output : 'this, console error : Failed to load "text" — ujang kelabu, Oct 04 '16 at 23:42

chepner · Accepted Answer · 2016-10-05T19:26:51.643

2

Use an array; this is the exact use case they were introduced to handle.

while IFS= read -r line; do
    options+=(-filter dynamictext:"$line")
done < title.txt
melt color:#eeeeee "${options[@]}"

Fix title.txt so that it correctly ends with a newline.

edited Oct 05 '16 at 19:26

answered Oct 05 '16 at 19:17

chepner

1 Answers1