Fix Telecine Artifacts in HandBrake for NTSC VOB

Converting NTSC VOB files from DVDs often introduces visible horizontal lines, known as combing or telecine artifacts, because 24 fps film content is typically padded to 29.97 fps using a process called 3:2 pulldown. To eliminate these artifacts during conversion, HandBrake includes a dedicated filter that reconstructs the original progressive frames through Inverse Telecine (IVTC). Configuring the Detelecine setting correctly removes these artifacts completely while preserving the original video quality.

The Primary Setting: Detelecine

To prevent telecine artifacts, navigate to the Filters tab in HandBrake and locate the Detelecine option:

The "Default" setting enables HandBrake's internal pullup algorithm. This algorithm analyzes the video stream, identifies the fields duplicated by the 3:2 pulldown process, discards the redundant fields, and weaves the matching fields back into clean, progressive film frames.

For the cleanest result when converting an NTSC VOB, configure the following related settings:

  1. Interlace Detection (Decomb): Under the Filters tab, set Interlace Detection to Default and Decomb to Default. While Detelecine handles the telecined film sections, Decomb acts as a safety net for hybrid content (such as scrolling credits or video-based extras) by deinterlacing only the frames that exhibit remaining comb artifacts without degrading progressive frames.
  2. Framerate Settings: Under the Video tab, set Framerate (FPS) to Same as source and select Peak Framerate (PFR) or Variable Framerate (VFR). When Detelecine removes the duplicate fields, the true framerate drops from 29.97 fps back to the native film rate of 23.976 fps. Setting the framerate to "Same as source" with VFR/PFR allows HandBrake to output the clean 23.976 fps stream smoothly without duplicating frames or causing stutter.

What to Avoid

Do not rely solely on the standard Deinterlace (Yadif/Bwdif) filter for telecined NTSC content. Standard deinterlacing treats every frame as an interlaced field pair, which leads to ghosting, blurred details, and motion judder on telecined material. Always use Detelecine to reverse the pulldown properly.