38-second ad: stills, clips, voice, music, render, cost per second

A 38-second ad built from six Nano Banana 2.1 stills, five 8-second Wan 3.0 clips at 720p, a 640-character voiceover, one Music 1.0 track and one timeline render costs $5.8554 on Sume list prices. That is $0.1541 per finished second. The video line is $5.00 of it, so 85 percent of the price is footage you mostly cut down.

Line items

Every number comes from the catalog and the docs. The footage is 40 seconds because five 8-second clips are shot for a 38-second cut; the render bills the 38-second output as one minute (ceil, minimum 1 minute).

Cost per finished second is the better metric

A per-clip price hides the shot ratio. Here 40 seconds of footage ends as 38 finished seconds, a ratio of 1.05, and the cost per finished second is $5.8554 / 38 = $0.1541. If you shoot 2 clips for every one you keep, the footage line doubles to $10.00 and the total becomes $10.8554, or $0.2857 per finished second.

The non-video lines (stills, voice, music, render) add up to $0.8554. Together they are 14.6 percent of the total. Optimizing them is worth less than choosing the right resolution for the clips.

Running it as a series

Four such ads a month cost 4 x $5.8554 = $23.4216. Move the footage from 720p to 1080p on Wan 3.0 and the video line becomes 40 x $0.25 = $10.00, so one ad is $10.8554 and four are $43.4216.

The other lines barely move with scale. A longer voiceover adds $0.00475 per 100 characters. A second music track adds $0.125. A second render minute, if the ad goes over 60 seconds, adds $0.10. The footage line is the one that matters, so use the table to decide where to spend: shots a viewer sees for two seconds do not need the same resolution as the hero shot.

Keep the shot ratio (footage seconds divided by finished seconds) in your own log. It was 1.05 here and 2.1 when half the takes were rejected.

Swap one line and recompute

• Clips at 480p Wan instead of 720p: 40 x 0.0625 = $2.50, total $3.3554.
• Clips at 720p Seedance 2.5: 40 x 0.5778 = $23.112, total $24.4674.
• Add a second music track: +$0.125, total $5.9804.

What to log

For each ad, record these five numbers in your own sheet so the next quote is a lookup instead of a guess.

• Footage seconds generated and finished seconds delivered, to get the shot ratio.
• Stills generated and stills used. Six stills at $0.10 each is only $0.60, so do not over-optimize this line.
• Voiceover characters. At 640 characters the voice costs $0.0304, which is a rounding error.
• Render minutes billed. A 38-second ad bills one; a 61-second ad would bill two.