+function get_group_id()
+{
+ local token
+ token=$(echo "${1}" | grep -e "^groupe" | ${SED} "s/^groupe-\(.*\)/\1/g")
+ echo "${token}"
+}
+
+# Arg1: group name
+function get_group_ref()
+{
+ local token
+ token=$(echo "${1}" | grep -e "^ref" | ${SED} "s/^\(ref\).*/\1/g")
+ echo "${token}"
+}
+
+# Get duplicate from. Ex: "dup1-7 planXYZ,geometry..." will return 1
+# Arg1: label
+function get_dup_from()
+{
+ local token
+ token=$(echo "${1}" | grep -e "^dup" | ${SED} "s/^dup\([0-9]\+\)-.*/\1/g")
+ echo "${token}"
+}
+
+# Get duplicate to. Ex: "dup1-7 planXYZ,geometry..." will return 7
+# Arg1: label
+function get_dup_to()
+{
+ local token
+ token=$(echo "${1}" | grep -e "^dup" | ${SED} "s/^dup[0-9]\+-\([0-9]\+\).*/\1/g")
+ echo "${token}"
+}
+
+# Generate frame index name with leading zeroes:
+# Arg1: frame number
+function get_frame_name()
+{
+ local index
+
+ index=$(printf "${F_FMT}" ${1})
+ echo "${dest}/${group}-f${index}.png"
+}
+
+# Arg1: start frame
+# Arg1: end frame
+function insert_empty_frames()