I learnt some BASH stuff and updated my record script so it no longer
needs a VCR_POST_REC command to kill mencoder; it can now receive and
act on the SIGTERM freevo sends. That could be a new FAQ item "How can I
specify my own recording script?".
I'll update the wiki sometime (which btw can be very slow and buggy with
random 500 errors thrown up).
I also wrote a quick build_index_avi that I run from VCR_POST_REC to
build the avi index after recording so I don't have to during runtime. I
could add that to the wiki sometime too if it's useful.
Amadeus (who promised to stop this week but didn't)
#!/bin/bash
# commands to run when finishing recording
clean_up () {
echo "Cleaning up..."
kill -INT $MPID # kill mencoder neatly
v4lctl volume mute on # silence tv
amixer -q cset numid=22 on # unsilence aux
exit 0 # exit nicely
}
trap clean_up TERM INT # trap TERM (15) and INT (ctrl-c) so we stop
recording when freevo tells us or when user wants to
# start the script
channel=$1; output=$2; seconds=$3
if [ -z $seconds ]; then
echo "Usage: ${0##*/} channel filename length(seconds)"
exit 1
fi
# some settings:
mencoder='/usr/bin/mencoder'
width=768
height=576
adevice=hw.0,0:alsa
# 2 bodges for converting tvtime channel names into mplayer channel names
# U29 -> 29
channel=${channel#U}
# S1-S20 -> SE1-SE20
if [[ ${channel#S} != $channel && ${channel#S} -lt 21 ]]; then
channel="SE${channel#S}"
fi
# mencoder options
options="tv:// -tv
driver=v4l2:brightness=53:contrast=26:saturation=50:hue=50:adevice=$adevice:forceaudio:audiorate=32000:amode=1:norm=PAL-BG:input=0:chanlist=europe-west:channel=$channel:width=$width:height=$height:outfmt=yuy2:device=/dev/video0:buffersize=64
-ovc lavc -lavcopts vcodec=mpeg4:vbitrate=4000:keyint=30 -oac mp3lame
-lameopts br=128:cbr:mode=3 -endpos $seconds -ffourcc divx -o $output"
# start the recording process:
# mute aux
amixer -q cset numid=22 off
# set aux vol
amixer -q cset numid=23 90%
# set capture aux
amixer -q cset numid=26 3
# set capture on
amixer -q cset numid=27 on
# set capture volume
amixer -q cset numid=28 90%
# video mute off
v4lctl volume mute off
$mencoder $options &
MPID=$? # get mencoder PID
# wait for the length of recording before stopping
while [ -z $flag ]; do
sleep $((seconds+2)) # take into account 2 seconds overhead
flag=1
done
clean_up
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