problem with shell_exec in a library.

[eluser]antonumia[/eluser]
If by 'library' you mean a model you need to include it in your controller constructer:

function MYClassname(){
$this->load->model->modelname;
}

then in your function:

$PID = $this->modelname->functionname();


Also if you're doing flv encoding using ffmpeg you should also install flvtool2 to insert the metadata after the flv has been created e.g.

shell_exec("flvtool2 -UP ".$filepath );