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One powerful function of vim is piping an area thru an external command.

(I think this is not what you are looking for, but, just for the record):

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%d",a/60,a\%60)}' 

One powerful function of vim is piping an area thru an external command.

(I think this is not what you are looking for, but, just for the record):

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%02d",a/60,a\%60)}' 

\thanks{Wildcard} for pointing out the "10:09" problem and solution

I think this is not what you are looking for, but, just for the record:

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%d",a/60,a\%60)}' 

One powerful function of vim is piping an area thru an external command.

(I think this is not what you are looking for, but, just for the record):

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%d",a/60,a\%60)}' 

I think this is not what you are looking fro, but, just for the record:

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%d",a/60,a\%60)}' 

I think this is not what you are looking for, but, just for the record:

:%!awk -F: '{a=$2*60+$1} END {printf("\%d:\%d",a/60,a\%60)}'