Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

(GNOME2, Ubuntu 10.04 LTS) I've made a nautilus script, so that if I have a directory full of various codecs, then I just need to right click in that folder -> Scripts -> THISSCRIPT.txt, then presto, it recursively converts all the video files (identified by video mimetype) to x.264 codec with 128 Kbit mp3 to avi. So that they will have small size+good quality. This works, great!

QUESTION: If I press "Cancel" on the Zenity progress bar, then the mencoder doesn't terminates.. How can I do this? I mean I need that If I press "Cancel" on the Zenity progress bar, it would terminate mencoder. How to do this?


which mencoder > /dev/null 2>&1; if [[ $? -ne 0 ]]; then echo -e '\nerror, no mencoder package detected'; exit 1; fi
which zenity > /dev/null 2>&1; if [[ $? -ne 0 ]]; then echo -e '\nerror, no zenity package detected'; exit 1; fi

find . -type f | xargs -I {} file --mime-type {} | fgrep "video/" | rev | awk 'BEGIN {FS="/oediv :"} { print $NF}' | rev | while read ONELINE
    if file "$ONELINE" | egrep -qvi "x.264|h.264"
        then echo $ONELINE
done | sed 's/^.\///' | tee /tmp/vid-conv-tmp.txt | while read ONELINE
    HOWMANY=`wc -l /tmp/vid-conv-tmp.txt | cut -d " " -f1`
    mencoder "$ONELINE" -o "OK-$ONELINE.avi" -ovc x264 -x264encopts bitrate=750 nr=2000 -oac mp3lame -lameopts cbr:br=128 > /dev/null 2>&1
    echo "scale=10;($HOWMANYLEFT / $HOWMANY) * 100" | bc | cut -d "." -f1
done | zenity --progress --text="Processing files ..." --auto-close --percentage=0
share|improve this question
up vote 2 down vote accepted

You need to use the --auto-kill option.. I've re-vamped the script a bit (I like your thinking-out-of-the-square use of rev, but there are other ways :) ...Here is one.

I've used yad instead of zenity. It is a fork of zenity, and the commands are basically the same. From what I've read, yad is being more actively developed and has more features (and this was a good chance for me to play with it). The --auto-kill option works with both zenity and yad.

As well as showing the percentage, the script shows a count of so-many (eg. 3 of 8) plus the current file's name. The percentage calculation uses awk(only because I'm comfortable with its syntax) ..

Re your specific question, just --auto-kill should be enough.

for p in mencoder yad ;do
    which $p >/dev/null 2>&1 || { echo -e '\nerror, no $p package detected'; exit 1; }

find . -type f -print0 |   # -print0 caters for any filename 
  xargs --null file --print0 --mime-type | 
    sed -n 's|\x00 *video/.*|\x00|p' | tr -d $'\n' |
      xargs --null file --print0 |
        sed -nr '/\x00.*(x.264|h.264)/!{s/^\.\///; s/\x00.*//; p}' >"$list"
        # At this point, to count how many files there are to process, break out of the pipe.
        # You can't know how many there are until they have all passed through the pipe.

fct=0; wcfct=($(wc "$list"));
while IFS= read -r file ;do
    ((fct+=1)); pcnt=$(awk -v"OFMT=%.2f" "BEGIN{ print (($fct-1)/$wcfct)*100 }")
    echo "# $pcnt%: $fct of $wcfct: $file"; echo $pcnt
    mencoder "$file" -o "OK-$file.avi" -ovc x264 -x264encopts bitrate=750 nr=2000 -oac mp3lame -lameopts cbr:br=128 >/dev/null 2>&1
done <"$list" | yad --title="Encoding Progress" --progress --geometry +100+100 --auto-close --auto-kill 
rm "$list"
share|improve this answer
wow, ty for the script update. :) I have only 1 problem left: the --auto-kill doesn't work with zenity. can you help on that? :\ – gasko peter Jul 3 '12 at 0:34
putting a: nohup $(while true; do sleep 3 && if ! ps -ef | fgrep -iw "zenity --progress --text=Processing files ... --auto-close --percentage=0 --auto-kill" | grep -v fgrep > /dev/null 2>&1; then pkill -9 mencoder; pkill -9 archive; exit 1; fi; done) & did the trick – gasko peter Jul 3 '12 at 2:13
...oops. I tested using sleep 5 rather than a full encode, sleep exits immediately, whereas the encoding continues until that particular file copletes. I must have a good look at what you've done. I'm glad you got it working. – Peter.O Jul 3 '12 at 4:42

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.