Ffmpeg conversion progress bar?

Question

Hello All,
I am currently in the process of writing a perl script to automate the conversion of avi files into mp4 format so that they can be played on my iPod classic 80GB. I was hoping to create some form of "progress bar" for the entire process. At the moment I am using ffmpeg to convert the files however I cannot see how to obtain a value for the time it is going to take to complete the conversion of each file. I have attached the code at the bottom of this post for anyone that is interested so far. Please forgive any problems with the perl code but I have only just started learning it (plus I'm a systems administrator not a code monkey).
If anyone has any ideas or has seen something that I can't see in the ffmpeg documentation then I would really like to hear it.
Cheers,
#!/usr/bin/env perl
use Cwd;
use strict;
use warnings;
use File::Basename;
while (@ARGV) {
print "*** Converting $ARGV[0] ***\n";
my $file = $ARGV[0];
my $newfile = getcwd.'/'.basename($file);
$newfile =~ s/\.avi$/.mp4/; # Convert File Extension To .mp4
my $output = `ffmpeg -i "$ARGV[0]" -vcodec libx264 -b 700k -acodec libfaac -ab 192k -s 320x240 -aspect 4:3 "$newfile" >& /dev/null`;
print "*** Conversion Complete ***\n";
shift @ARGV;

Answer 1

Well actually, only the JDK 1.4 allow such thing.
The other solution is allways increasing the max size
on when the max length is set, to set the length to the minimun
and restart the process. Try the progressbar of the JDK 1.4 seems
to be the best solution for your problem.