Check your clip

Numbers (ffprobe)

• Frames: exactly the frame count of your stretch, (Resume − Start) × the episode’s rate. Count only your shot’s frames, not the padded tail.
• Size: the Start still’s.
• Sound: within 0.1 s of the picture; the platform rejects more.
• File: an H.264 + AAC MP4 of 5–120 seconds to submit (from 1.5 s for a local pack made outside the builder, with extension 0.64.3 or later), at an even size between 320 × 180 and 4096 × 2160.

Faces, by eye

• Look at every face in the result. The automatic check compares with your source, and can pass a recast face that moves the same way.
• Step through the result next to the source. Every person is still themselves: the same face, hair and clothes; nobody added, missing or turned into a look-alike.
• Small figures far away are the ones that disappear.
• Recast: the new person looks the same in every shot.

Flicker

The flicker check workflow (seamless-flicker-check.json, download) paints red wherever the result flickers against your original, frame to frame:

• load your original in Source and your result in Final (the same length and size), and play Check by eye: red = flicker;
• red blobs on scenery or on people are a problem; a thin red line along a moving new element is normal. For a fast creature, the red outlines and flecks round it are its motion. Judge the red on scenery and people only;
• judge it by eye: how many frames show some red doesn’t matter;
• it needs most of 32 GB of RAM for a long shot. Run it on one shot at a time.

Sound and speed

• Watch at normal speed, with sound. The voice matches the mouth (or the light, for a non-human speaker); there’s no click or gap at a join.
• Then on the episode: Preview clip… in Creator tools to play it in place. Judge the joins at normal speed.

Checks aren’t playback: a clip that passes every check can still join badly. Watch the joins with Watch with edit.