| Online Video (OLV) | Over-the-Top (OTT) | |
|---|---|---|
| Ad Serving | First party (site served) or third party | First party (site served) only |
| Aspect ratio | 16:9 | 16:9 |
| Minimum duration | 5s | 15s |
| Maximum duration | 120s | 30s |
| Recommended duration | 6s-30s | A length of exactly 15s or 30s is required |
| Minimum frame size | 1920x1080 (640x360 for third party served) | 1920x1080 |
| Minimum video bitrate | 4mbps (2mbps for third party served) | 4mbps |
| Recommended video bitrate | 8mbps | 8mbps |
| Maximum video bitrate | 15mbps | 15mbps |
| Video frame rate (fps) | 23.976 (recommended), 24, 25, or 29.97 | 23.976 (recommended), 24, 25, or 29.97 |
| Video frame rate mode | Constant | Constant |
| Minimum audio bitrate | 192kbps (128kbps for third party served) | 192kbps |
| Audio sample rate | 44.1kHz or 48kHz | 44.1kHz or 48kHz |
| Supported Formats | Video: H.264, MPEG-2, or MPEG-4; Audio: PCM or AAC | Video: H.264, MPEG-2, or MPEG-4; Audio: PCM or AAC |
| Audio Channel | Minimum of 2-Channels | Minimum of 2-Channels |
Advertisers can use third party video tags from an Amazon certified third party vendor (excluding OTT). The tags must be VAST 2, VAST 3, or VPAID 2. We recommend including VAST 2 tags in every campaign to ensure all supply sources can be used, as some sources do not support VAST 3 or VPAID. If a VPAID tag is provided, we recommend it includes both Flash and JavaScript to access more inventory.
Video viewability should be measured using VPAID tags from one of the approved vendors.
In order for JavaScript video players to accept a VAST response, ad servers have to include a Cross Origin Resource Sharing (CORS) header formatted as:
Access-Control-Allow-Origin: <origin header value>
Access-Control-Allow-Credentials: true
Without a valid VAST response, a video creative will not serve on Amazon-owned sites. This ensures a positive experience for Amazon’s customers.