Smooth telecine judder in partly telecined video with FFmpeg dejudder

Guide ID: art_01M6WGCFW71X2B903RM0XWRDA8

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Guide title

Smooth telecine judder in partly telecined video with FFmpeg dejudder

Coverage

For editors and encoders with mixed film and video sources, mainly DVD material, that still judder after inverse telecine. They end up with a way to pick a dejudder setting for their source. It follows the FFmpeg filters manual only and no command was run.

Example

Hypothetical and not run: an NTSC DVD mixing film and video segments, where you would compare a slow pan before and after to see whether the regular stutter eases.

Useful starting points

• If judder persists, the cycle value probably does not match your source. The manual gives no way to identify the right one, so expect some trial and error.
• Output from partly telecined input can have a variable frame rate and a changed container rate, so check the rate afterwards before editing.
• Apply the chain only to telecined sections. The manual's no-effect statement covers the dejudder filter alone, not the inverse telecine filter before it.