Extend a clip
How to extend a short AI clip
Extending uses the end of a short source clip as context for newly generated footage. You choose the total duration and receive one 720p result that combines the source and continuation. Because generated motion can vary, review the transition and the added section before using the result.
Step by step
- 1Pick the source clip. Use an eligible completed render from My Videos, or upload an MP4 or MOV of 2 to 10 seconds no larger than 100 MB.
- 2Choose the total length. You set the finished length, up to 15 seconds. A 9 second source taken to 15 adds 6 seconds.
- 3Describe only the continuation. Write what should happen next, not what already happened. Re-describing the opening makes the model repeat it.
- 4Check the added seconds. Read the displayed quote before starting. The charge is the greater of 2 credits per added second or a minimum of 0.8 credits per second of the finished video, rounded up to a whole credit.
- 5Review the join. Watch the transition where the generated section begins. If the motion jumps or the subject changes, simplify the continuation prompt or add fewer seconds.
What clips can I extend?
- MP4 or MOV, 2 to 10 seconds, no larger than 100 MB
- Total finished length up to 15 seconds
- The combined result is returned at 720p
- One extension runs at a time per clip
- Only eligible completed 2 to 10 second clips show Make longer in My Videos
How should I write the continuation prompt?
Describe one next action instead of repeating the opening or rewriting the whole scene. For example: The toy robot takes one careful step forward, plants both feet, and stops facing the camera. The final frames provide visual context, but generated details can still vary.
How much does an extension cost?
The quote uses the greater of 2 credits per added second or a minimum of 0.8 credits per second of the finished video, rounded up to a whole credit. For the added-second part of the calculation, the source duration is rounded up and the target duration is rounded down. A 9 second clip extended to 15 costs 12 credits. A 10 second clip extended to 15 also costs 12 credits because the minimum applies.
What should I check in the result?
- The transition into the newly generated section
- Subject identity, object count, body and hand shape
- Motion direction, camera framing, and the final frame
- Whether the prompt asked for too many separate actions in a short span
- Whether the source ends during blur or a cut, which gives the continuation less stable context
What each mode costs
Credits are charged per mode, not by one flat rate. Standard video renders at 720p, premium renders at 1080p, and 2K or 4K is a separate upscale of a clip you already have.
| Mode | Standard | Premium | Output | Length |
|---|---|---|---|---|
| Text to video | 1 credit per second | 2 credits per second | 720p standard, 1080p premium | 5, 10 or 15 seconds |
| Image to video | 1 credit per second | 2 credits per second | 720p standard, 1080p premium | 5, 10 or 15 seconds |
| Reference and video to video | 1 credit per second | 2 credits per second | 720p standard, higher on premium reference renders | Follows your source clip |
| Video extension | 2 credits per added second, with a minimum based on the finished length | No separate premium tier | 720p | Source 2 to 10 seconds, total up to 15 seconds |
| Text to image | 5 credits per image | 10 credits per image | High resolution still, premium adds an upscale pass | One image per request |
| Image editing | 5 credits per edit | 10 credits per edit | Matches your source image, premium adds an upscale pass | One edit per request |
| Upscale a finished clip | 5 credits to 2K | 10 credits to 4K | 2K or 4K, from an existing render | Any finished clip |
| Companion clip | 10 credits per clip | No separate premium tier | 720p | Fixed short clip |
Worked totals
- 5 second clip, standard: 5 credits
- 15 second clip, standard: 15 credits
- 15 second clip, premium 1080p: 30 credits
- 9 second clip extended to 15 seconds: 12 credits, only the 6 added seconds
- One image plus one edit, standard: 10 credits
- 15 second clip upscaled to 4K: 15 plus 10 credits
Failed renders are refunded automatically. See credits and packs for pack prices.
Questions
What does the extension return?
The result combines the source with a newly generated continuation in one video. Review the full returned file, including the transition, before using it.
What does an extension cost?
The shown quote is the greater of 2 credits per added second or a minimum of 0.8 credits per second of the finished video, rounded up to a whole credit. Both 9 to 15 seconds and 10 to 15 seconds cost 12 credits.
How long can the finished clip be?
Up to 15 seconds in total, from a source of 2 to 10 seconds.
Next
Last updated 2026-09-21.
Loading the interactive page...