record_vlc.sh

#!/bin/bash
# record_vlc.sh
# Nanawel 2014
# https://lanterne-rouge.info/2014/01/num%C3%A9risation-de-vhs-sous-linux

echo "====== VHS Record (VLC) ======"

VIDEO_DEV="/dev/video0"
SOUND_DEV="alsa://hw:2,0"
NORM="SECAM_LC"
OUTPUT=$(dirname $0)/record_$(date +%s).mpg
VCODEC="mp1v"					# Video codec
ACODEC="mpga"					# Audio codec
VB="1024"						# Video bitrate
AB="192"						# Audio bitrate
BIN="cvlc -v"

if [ ! -z $1 ]; then
	RT=$(($1*60))
    ENDPOS_OPT=":run-time=$RT"
else
    ENDPOS_OPT=""
fi

PLAYBACK_CMD="$BIN v4l2://$VIDEO_DEV :v4l2-standard=$NORM :input-slave=$SOUND_DEV :live-caching=300 $ENDPOS_OPT"
TRANSCODE_OPTIONS=":sout=#transcode{vcodec=$VCODEC,acodec=$ACODEC,vb=$VB,ab=$AB}:standard{access=file,dst=$OUTPUT}"

CMD="$PLAYBACK_CMD $TRANSCODE_OPTIONS vlc://quit"

# Only playback (for testing purposes)
#CMD="vlc v4l2://$VIDEO_DEV :v4l2-standard=$NORM :input-slave=$SOUND_DEV :live-caching=300"

echo "====== Command ======"
echo $CMD
echo
echo Press Enter to confirm or Ctrl-C to abort
read

echo "====== Running ======"
$CMD 2>&1 | tee $OUTPUT.log