Apache .htaccess to Nginx rewrite question

Hello, I am having a tough time converting my .htaccess rewrite rules
into Nginx, any help will be greatly appreciated.

Here is what I need converting

RewriteEngine on
RewriteCond %{REQUEST_URI} !^/server-info
RewriteCond %{REQUEST_URI} !^/server-status
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} !-f
RewriteCond %{REQUEST_URI} (.).(gif|jpg|jpeg|png)$
RewriteRule ^(.
) http://%{http_host}/pictures/no_picture.jpg

RewriteRule ^video/([-!~*'()a-zA-Z0-9]+)-([-!~*'()a-zA-Z0-9]+)
http://%{http_host}/?L=video.index&id=$2

Thanks

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