This is version 2.18 of the AWS Elemental Server documentation. This is the latest version. For prior versions, see the *Previous Versions* section of [AWS Elemental Conductor File and AWS Elemental Server Documentation](https://docs.aws.amazon.com/elemental-server/).

# Image Processing – Scan Type – Secondary Fields
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## Description
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The scan type of the input can be converted to a different scan type: progressive, interlaced, hard telecine, or soft telecine. You can configure to leave the scan type as is or to convert from one incoming type (or a mix of incoming scan types) to another single type. Configuring for scan type conversion involves setting fields in specific ways. 

**Force Deinterlace **

The field applies only when the Deinterlacer Preprocessor is turned on. It deals with issues of badly tagged frames.
+ When the **Deinterlace Mode** is Adaptive, set **Force Mode** to Off. 
+ When the **Deinterlace Mode** is Deinterlace, use **Force Mode** as follows:
  + **Off**: The processor does not convert frames that are tagged in metadata as "progressive." It only converts those that are tagged as some other type. 
  + **On**: The processor converts every frame to "progressive" – even those that are already tagged as "progressive." Turn **Force ****Mode** on only if the input frames are incorrectly marked as "progressive." Do not turn otherwise; processing frames that are already tagged as "progressive" degrade video quality. 
+ When the **Deinterlace Mode** is Inverse Telecine, use **Force Mode** as follows: 
  +  Off: The processor monitors presence/absence of the hard telecine field repeat cadence and applies only to hard telecine to progressive conversion on frames that have a distinct cadence. 
  + On: The processor still monitors for hard telecine cadence and adapts to cadence, but all frames are converted from hard telecine to progressive using the last detected cadence. 

**Deinterlace Algorithm **

The field applies only when the Deinterlacer Preprocessor is turned on and when the **Deinterlace Mode** is set to **Deinterlace** or **Adaptive**. Set it to the desired value: 
+  Motion adaptive interpolation: Provides for better spatial quality (i.e. produces sharper images). 
+ Motion adaptive blend: Provides for better temporal quality (i.e. produces smoother motion). 
+ Low latency interpolation: Performs interpolated line-doubling to allow for lower latency applications. 

## Location of Fields
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| Location of Field on Web Interface | Location of Tag in XML | 
| --- | --- | 
| Streams > Advanced >Preprocessors > Deinterlacer > Deinterlace Algorithm | stream\$1assembly/video\$1description/video\$1preprocessors/deinterlacer/algorithm | 
| Streams > Advanced >Preprocessors > Deinterlacer > Force Mode | stream\$1assembly/video\$1description/video\$1preprocessors/deinterlacer/force |