overwrite file without asking

[jcor]

Hi,
I have a script that convert a file, "$novo" in this case, to a 3gp file:
this is part of the script:

 
print "qual é o título da peça? (< 36 caracteres)\n";
my $titul=<STDIN>;
chomp($titul);
 
my $outputgprs="$titul"."_25".".3gp";    
 
system "ffmpeg -i '$novo' -acodec libamr_nb -ar 8000 -ac 1 -r 7 -b 25k -s 176x144 -vcodec h263 -ab 7.95k /home/user/Desktop/$outputgprs"; 

Obviously, before I already put the file to convert in "$novo". Didn't write all the code to save space.

My problem here is that sometimes already exists a file with the same name of the target file. When this happens, ffmpeg asks something like: "Do you want to overwrite the file ....?"
I'd like it to overwrite without asking, letting the user out of this.

I can I tell it to allways assume yes, or something like that?

thanks in advance,

João

[KevinADC]

Hi,
I have a script that convert a file, "$novo" in this case, to a 3gp file:
this is part of the script:

 
print "qual é o título da peça? (< 36 caracteres)\n";
my $titul=<STDIN>;
chomp($titul);
 
my $outputgprs="$titul"."_25".".3gp";    
 
system "ffmpeg -i '$novo' -acodec libamr_nb -ar 8000 -ac 1 -r 7 -b 25k -s 176x144 -vcodec h263 -ab 7.95k /home/user/Desktop/$outputgprs"; 

Obviously, before I already put the file to convert in "$novo". Didn't write all the code to save space.

My problem here is that sometimes already exists a file with the same name of the target file. When this happens, ffmpeg asks something like: "Do you want to overwrite the file ....?"
I'd like it to overwrite without asking, letting the user out of this.

I can I tell it to allways assume yes, or something like that?

thanks in advance,

João

The first thing I would do is see if whatever program you are using has a command line switch you can add to the system() command string to auto ovwerwrite files without asking for confirmation. If there is none, look into the Expect or Expect::Simple modules.

cpan: Expect

[jcor]

you were right, there's a parameter "-y" to use in the command line to force the overwrite.

I never tought could be that simple!

thanks a lot,

João

[KevinADC]

you were right, there's a parameter "-y" to use in the command line to force the overwrite.

I never tought could be that simple!

thanks a lot,

João

I've had similar situations in the past and learned to always check a programs command line switches/options for the documented commands, and also search online for any undocumented commands.

[tazosmr]

JUST USE:

ffmpeg -y .....