> For the complete documentation index, see [llms.txt](https://docs.qolaba.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.qolaba.ai/video-generation/output-controls/duration-resolution-and-quality.md).

# Duration, Resolution & Quality

Duration and resolution are the two output settings with the greatest combined impact on visual quality and credit cost. Understanding how they interact helps you iterate efficiently and spend credits where they matter most.

***

#### Video Duration

Duration controls the length of the generated video in seconds. Available options vary by model.

**Supported Durations**

| Duration      | Credit Cost | Best For                                                   |
| ------------- | ----------- | ---------------------------------------------------------- |
| **1 second**  | Lowest      | Quick cuts, looping visuals, seamless transitions          |
| **4 seconds** | Low         | Short social clips, product moments, cut-ins               |
| **6 seconds** | Moderate    | Social media content, brief narrative scenes               |
| **8 seconds** | Higher      | Cinematic scenes, product demos, full storytelling moments |

**Per-Model Duration Support**

| Model            | 1s | 4s | 6s | 8s |
| ---------------- | -- | -- | -- | -- |
| **Veo 3.1**      | —  | ✓  | ✓  | ✓  |
| **Veo 3.1 Fast** | —  | ✓  | ✓  | ✓  |
| **Seedance**     | —  | ✓  | ✓  | ✓  |
| **Seedance 2.5** | —  | ✓  | ✓  | ✓  |
| **Happy Horse**  | —  | ✓  | ✓  | ✓  |
| **Runway**       | —  | ✓  | ✓  | ✓  |
| **Hailuo**       | —  | ✓  | ✓  | —  |
| **Kling 3**      | —  | ✓  | ✓  | ✓  |
| **Kling V3**     | —  | ✓  | ✓  | ✓  |
| **Vidu Q3**      | ✓  | ✓  | —  | —  |
| **Luma**         | —  | ✓  | ✓  | ✓  |
| **Imagine**      | —  | ✓  | ✓  | ✓  |

***

#### Resolution & Quality

Resolution controls the visual fidelity and pixel density of the generated video. Higher resolution produces sharper output — and costs more credits per generation.

**Available Resolutions**

| Resolution | Credit Cost | Best For                                               |
| ---------- | ----------- | ------------------------------------------------------ |
| **720p**   | Lower       | Draft generation, concept testing, prompt validation   |
| **1080p**  | Standard    | Social media, client delivery, standard distribution   |
| **4K**     | Higher      | Commercial production, broadcast, high-fidelity output |

**Per-Model Resolution Support**

| Model            | 720p | 1080p | 4K |
| ---------------- | ---- | ----- | -- |
| **Veo 3.1**      | ✓    | ✓     | ✓  |
| **Veo 3.1 Fast** | ✓    | ✓     | ✓  |
| **Seedance**     | ✓    | ✓     | ✓  |
| **Seedance 2.5** | ✓    | ✓     | ✓  |
| **Happy Horse**  | ✓    | ✓     | —  |
| **Runway**       | ✓    | ✓     | —  |
| **Hailuo**       | ✓    | ✓     | —  |
| **Kling 3**      | ✓    | ✓     | ✓  |
| **Kling V3**     | ✓    | ✓     | ✓  |
| **Vidu Q3**      | ✓    | ✓     | —  |
| **Luma**         | ✓    | ✓     | ✓  |
| **Imagine**      | ✓    | ✓     | —  |

***

#### Choosing Duration and Resolution Together

Duration and resolution compound in their effect on credit cost and should be decided together.

1. **For testing and iteration:** Start at **4 seconds + 720p** — the most credit-efficient configuration that still produces a meaningful output to evaluate. Motion quality, prompt adherence, composition, and style are all clearly visible at this setting.
2. **For standard final delivery:** Move to **6–8 seconds + 1080p** once your prompt and model are confirmed. This covers most social media, client, and digital distribution requirements.
3. **For high-production final output:** Use **8 seconds + 4K** only for confirmed final outputs destined for commercial, broadcast, or large-screen delivery. Credit usage is significantly higher — never use it for testing.

{% hint style="info" %}
A 720p draft followed by a single 4K final generation is far more credit-efficient than generating at 4K from the start. Validate direction first, then upgrade resolution for the final output only.
{% endhint %}


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