# External Programs

*Article Topics:* [*Customization*](/getting-started/common-topics/customization.md)

The Configuration Admin's "External Programs" section contains Binary Paths to various tools that NATS will use. Finding each Binary Path can be 

## Binary Paths

* **Path To PHP** - Set the desired path to PHP. This can be found using the command: which php.
* **Path To Zip** - Set the desired path to Zip. This can be found using the command: which zip.
* **Path To Unzip** - Set the desired path to Unzip. This can be found using the command: which unzip.
* **Path To Ffmpeg** - Set the desired path to ffmpeg. This can be found using the command: which ffmpeg.
* **Prefer Ffmpeg Bin** - Set whether to use ffmpeg whenever possible.
* **Ffmpeg Flv Match Source** - Set whether to match source attributes during conversion.
* **Path To Mplayer** - Set the desired path to Mplayer.
* **Bframes Check** - Improves the quality of Mplayer.
* **Path To Mencoder** - Set the desired path to MenCoder. This can be found using the command: which Mencoder.
* **Path To Flvtool2** - Set the desired path to Flvtool2. This can be found using the command: which Flvtool2.
* **No Flvtool2** - Set whether to index flash with flvtool2 after a conversion.
* **Path To Convert** - Set the desired path to Convert. This can be found using the command: which convert.
* **Url To Flowplayer** - Set the URL of the folder that contains flowplayer swf and js files. 
* **Path To Nice** - Set the desired path to NICE. This can be found using the command: which nice. This is used for bulk ad tools.
* **Path To Tar** - Set the desired path to TAR. This can be found using the command: which tar.


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