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Want to parse output for variables in Bash

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Top Forums Shell Programming and Scripting Want to parse output for variables in Bash
# 8  
Old 05-03-2010
So far this is awesome! Going to have to run it against a few test MKV's to see that it's reliably getting that correct information - thank you so much!

Code:
# Adding a little routine to check the Pixel Width and Frames Per Second
MKVFPS=$( mkvinfo "$i" | awk -F "[ (]" '/Default duration:/ { print $(NF-5)}')
echo " *** Test MKV Information ***"
echo "MKVFPS: $MKVFPS"

MKVWIDTH=$( mkvinfo "$i" | awk -F "[ (]" '/Pixel width:/ {print $NF}')
echo "MKVWIDTH: $MKVFPS"

Outputs:
Code:
MKVFPS: 23.976
MKVWIDTH: 23.976

# 9  
Old 05-03-2010
Quote:
Originally Posted by randyharris
I tried that code exactly as shown above, and also as a 1 liner, but both times got this output:

Code:
awk: illegal primary in regular expression .*( at 
 source line number 2
 context is
	/ Default duration:/ >>>  {sub(".*\(","") <<<

Two solutions :
Code:
/ Default duration:/ {sub(".*\\(","");print $0 + 0}

Or
Code:
/ Default duration:/ {sub(/.*\(/,"");print $0 + 0}

Jean-Pierre.
# 10  
Old 05-03-2010
I was looking to leverage this to a very similar situation, in this other situation the pattern I am trying to match shows up in the information multiple times. Is there a way I can tell it to only return the 1st time after the pattern match and not continue to show the ones that show up afterwards.

e.g.:
width = 720
thisfield =
thatthat =
width = 853
thisotherfield =
thatotherfield =
width = 853

"width = " shows up multiple times, I would only like to see the value for the first, 720.
Last edited by randyharris; 05-03-2010 at 04:35 PM..
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