> ## Documentation Index
> Fetch the complete documentation index at: https://docs.letmepost.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# instagram.media.video_size_max

> Instagram videos and Reels must be ≤ 1 GB.

## What it checks

`byteLength <= 1_000_000_000` per video item. Reels also have a 90-second duration cap that's enforced at platform level (preflight doesn't probe duration without ffprobe).

## Why

Meta's Instagram Reels documentation caps individual videos at 1 GB. Beyond that the upload is rejected.

## Failure response

```json theme={"system"}
{
  "error": {
    "code": "preflight_failed",
    "rule": "instagram.media.video_size_max",
    "platform": "instagram",
    "message": "Video is 1450000000 bytes; Instagram allows at most 1000000000.",
    "remediation": "Compress the video under 1000000000 bytes (Instagram Reels accepts up to 1 GB)."
  }
}
```

## Remediation

Re-encode at a lower bitrate. For a 60 s Reel at 1080×1920, \~6 Mbps is plenty:

```sh theme={"system"}
ffmpeg -i input.mp4 -c:v libx264 -b:v 6M -c:a aac -b:a 128k -movflags +faststart output.mp4
```

## Related

* [`instagram.media.mime_allowed`](/preflight/instagram-media-mime_allowed)