Method

GOP structure

GOP structure / I-frame interval

What we measure and how

GOP (Group-of-Pictures) structure measures the encoder's I-frame placement strategy — fixed-interval keyframes vs scene-cut adaptive — which determines random-access granularity and codec efficiency. The check reads packet-level keyframe positions from the primary video stream, computes the distribution of GOP lengths, and matches against the spec's required I-frame interval (e.g. closed GOP of 1 for all-Intra ProRes; open GOP of 12 or 24 for delivery H.264).

Spec fields consulted

These Universal Media Delivery Profile paths resolve this check's thresholds against your spec snapshot at the moment the job was submitted.

• · assets.video.gop.length
• · assets.video.gop.closed_required
• · assets.video.gop.all_intra_required

The full UMDP schema: /umdp.

Method identifier: gop_structure