converting a wmv file

[kishanforum]

HI every one

i ahve the following issue

 

My ffmpeg was located at /usr/local/bin

And i am executing the following cmnd through my application

 

exec("ffmpeg -i  $src  -ar 22050 -ab 32 -f flv    -s 320x240 -y $dest.flv");

 

It works quite  fine for all other types of files

 

where as for wmv files its creating a flv file of size 0 .

 

where as when iam executing the same cmnd through command line in my lynux shell its creating the flv with some size

 

what can be the problem is the problem with my ffmpeg settings or my application