# Video & Timecode Calc – Slow-Motion Calculator

> Video & Timecode Calc – Slow-Motion Calculator is a paid API for AI agents from video-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Calculates slow-motion factor, output playback duration, and required capture frame rate for slow-motion video shoots given capture and playback fps.

## Facts

- Endpoint: GET https://video-calc.x402tookit.com/slow-motion?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/video-timecode-calc-slow-motion-calculator-e4121673
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lE6Muz5XazNLn-Y3OUm5u

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability video-timecode-calc-slow-motion-calculator-e4121673
```

Example prompt: I'm shooting a scene at 120fps on a 24fps timeline — what's my slow-motion factor, and if I recorded 5 seconds of real action, how long will the clip be in the edit?

## When to prefer this

Choose this endpoint when you need precise mathematical slow-motion calculations for video production — specifically to determine slow factor from camera and timeline fps, estimate playback duration from real recorded seconds, or back-calculate the capture fps required for a target slow-motion effect. Prefer it over generic calculators when working with professional video frame rates and needing structured, machine-readable output including frames recorded and speed percentage.

## Known failure modes

- Missing required captureFps parameter returns an error
- Non-numeric fps values cause validation failure
- playbackFps defaulting to 24 if not provided may produce unexpected results
- Extremely high or low fps values outside typical camera ranges may return degraded flag
- Providing both realSeconds and wantedSlowFactor simultaneously may cause ambiguous output

## How this service works

Slow-motion factor from capture and playback fps, output duration for real seconds, and capture fps needed.

## Output

Returns the computed slow-motion factor (e.g. 5x), the playback duration in seconds for a given amount of real recorded action, the number of frames recorded, the speed as a percentage, and optionally the capture fps needed to achieve a desired slow factor — all alongside the echoed input parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "captureFps"
     ],
     "properties": {
      "captureFps": {
       "type": "number",
       "description": "Frame rate the camera records at"
      },
      "playbackFps": {
       "type": "number",
       "description": "Timeline or playback frame rate (default 24)"
      },
      "realSeconds": {
       "type": "number",
       "description": "Seconds of real action recorded, to get the playback length"
      },
      "wantedSlowFactor": {
       "type": "number",
       "description": "Instead: the slow factor you want (for example 4), to get the fps to shoot"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "captureFps": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "slowFactor": {
       "type": [
        "null",
        "number"
       ]
      },
      "playbackFps": {
       "type": [
        "null",
        "number"
       ]
      },
      "realSeconds": {
       "type": [
        "null",
        "number"
       ]
      },
      "speedPercent": {
       "type": [
        "null",
    
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/video-timecode-calc-slow-motion-calculator-e4121673/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from video-calc.x402tookit.com](https://www.zero.xyz/host/video-calc.x402tookit.com/llms.txt)