From: Jason Cameron <luxen124012x1@...>
Date: 2006-01-18T14:33:20+09:00
Subject: Re: Looping through files using exec

nobuyoshi nakada wrote:
> Hi,
> 
> At Wed, 18 Jan 2006 13:09:23 +0900,
> Jason Cameron wrote in [ruby-talk:176073]:
>> I'm trying to do a mass encode of a large directory of media files but 
>> I'm not having much luck.  I tried to use bash but it doesn't like 
>> filenames with spaces so now I'm trying to do it with ruby but using the 
>> exec command it executes the first line then finishes.  Here's what I've 
>> done in the IRB.
> 
> exec replaces current process with invoked command, use system
> instead.
> 
> 
>> Dir["*.avi"].each {|x| exec ("mencoder \"" + x + "\" -vf scale=320:240 
>> -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=150 -oac mp3lame -lameopts 
>> vbr=3:br=64 -o \"Done\\" + x + "\"") }
> 
> And also bash should work if you quote names properly:
> 
>   opts="-vf scale=320:240 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=150 
> -oac mp3lame -lameopts vbr=3:br=64"
>   for x in *.avi; do
>     mencoder "$x" $opts -o "Done \"$x\""
>   done

Sweetness!  Thanks!  Actually now it seems that all my created files are 
in the same directory prefaced by '\Done\' instead of going in the Done 
directory.  Go figure.  Oh well.  At least I can encode en masse!  Good 
thing too.  I've got a 50+ files to re-encode (a series) for my 
pocketpc.  When you can stuff 15 hours of video on a 1gb sd card that's 
a good thing(tm).

My bash script was similar but I didn't have the quotes.

Thanks again!

J

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