Image Processing – Scan Type – Secondary Fields - AWS Elemental Live

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Image Processing – Scan Type – Secondary Fields

Description

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

Location of Field on Web Interface Location of Tag in XML
Streams > Advanced >Preprocessors > Deinterlacer > Deinterlace Algorithm stream_assembly/video_description/video_preprocessors/deinterlacer/algorithm
Streams > Advanced >Preprocessors > Deinterlacer > Force Mode stream_assembly/video_description/video_preprocessors/deinterlacer/force