[SOLVED] BASH script to record webcam & save in defined directory, stop recording then repeat?

elliotjreed · 07-10-2013, 06:03 AM

Hi! First go on LQ so I'm hoping someone can help. Basically I want to record a webcam stream with a given filename set as a variable ($USERINPUTNUM), stop that recording when a user enters a number (eg. 123456) and hits enter, then begin recording again under the new number they've entered (eg. 678910). Here's what I've got so far, but the user has to Ctrl+C out of it first - I just need them to be able to enter the new number followed by Enter to stop the previous recording and start the next.

Any ideas? Here's the script so far... (quite new to this just to warn!):

Code:

#!/bin/bash
while true
do

YELLOW="\033[1;33m"
BLUE="\033[1;34m"
ENDCOLOUR="\033[0m"
TIMESTAMP=$(date +"%Y.%m.%d_%H.%M")

read -p "Scan your barcode and get packing: " USERINPUTNUM

echo -e $YELLOW"Saving order process..."$ENDCOLOUR

avconv -f video4linux2 -r 3 -fs 52428800 -i /dev/video0 /home/$USER/records/$TIMESTAMP-$USERINPUTNUM.avi 

echo -e $BLUE"Video recording complete, keep going!"$ENDCOLOUR

done

Thanks

elliotjreed · 07-10-2013, 09:06 AM

Sorted! Did:

Code:

#!/bin/bash

stop() { [ $CPID -ne 0 ] && kill -INT $CPID && wait $CPID && echo "Killed $CPID"; }

trap "stop; exit" INT

CPID=0
while :; do
  read -p "Please scan your order barcode, and scan the next when complete: " USERINPUTNUM
  stop
  [ "$USERINPUTNUM" == quit ] && break;
  TIMESTAMP=$(date +"%Y.%m.%d_%H.%M")
  avconv -f video4linux2 -r 3 -fs 52428800 -i /dev/video0 /home/$USER/orders/$TIMESTAMP-$USERINPUTNUM.avi > /dev/null 2>&1 &
  CPID=$!
done