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---
title: Defining conversions
weight: 2
---
A media conversion can be added to your model in the `registerMediaConversions`-function. It should start with a call to `addMediaConversion`. From there on you can use any of the methods available in the API. They are all chainable.
Take a look in the [Defining conversions section](/laravel-medialibrary/v7/converting-images/defining-conversions/)
for more details.
## General methods
### addMediaConversion
```php
/**
* Add a conversion.
*
* @param string $name
*
* @return \Spatie\MediaLibrary\Conversion\Conversion
*/
public function addMediaConversion($name)
```
### performOnCollections
```php
/**
* Set the collection names on which this conversion must be performed.
*
* @param string $collectionNames,...
*
* @return $this
*/
public function performOnCollections($collectionNames)
```
### queued
```php
/**
* Mark this conversion as one that should be queued.
*
* @return $this
*/
public function queued()
```
### nonQueued
```php
/**
* Mark this conversion as one that should not be queued.
*
* @return $this
*/
public function nonQueued()
```
## Image manipulations
You may add any call to one of [the manipulation functions](https://docs.spatie.be/image) available on [the spatie/image package](https://github.com/spatie/image).
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