exec() with ffmpeg and convert

[decaPeter]

Hello,

i'm trying to execute commands with exec() on PHP 5.2 on windows server.

I can run and echo exec('whoami') but i cant run exec() with ffmpeg and concert.

With

echo exec('convert.exe a.jpg output.png')

return : "ParamŠtre non valide"
i have tried everything :

$input = "C:\\my\\folder\\httpdocs\\imagick\\a.jpg";
$output = "C:\\my\\folder\\httpdocs\\imagick\\output.png";
echo exec("convert.exe $input $output");

return : "ParamŠtre non valide"

$input = "C:/my/folder/httpdocs/imagick/a.jpg";
$output = "C:/my/folder/httpdocs/imagick/output.png";
echo exec("convert.exe $input $output");
echo exec("convert $input $output");

return : "ParamŠtre non valide"
but in windows cmd shell, it works!!

echo exec("ffmpeg.exe input.avi output.flv");

echo exec("ffmpeg input.avi output.flv");

return nothing... and its the same with all path tests... (but it works in cmd)

any idee? i need help, i have read so much forum but i never solved the problem

 

[decaPeter]

solved :

it was a security of IIS plesk user. I had to add rights for IIS Plesk user on folters of ffmpeg and convert. Now it works.