Amazon Rekognition
Developer Guide

Recommendations for Camera Set-Up (Stored and Streaming video)

The following recommendations are in addition to Recommendations for Camera Set-Up (Image and Video).

  • The codec should be h.264 encoded.

  • The recommended frame rate is 30 fps. (It should not be less than 5 fps.)

  • The recommended encoder bitrate is 3 Mbps. (It should not be less than 1.5 Mbps.)

  • Frame Rate vs. Frame Resolution — If the encoder bitrate is a constraint, we recommend favoring a higher frame resolution over a higher frame rate for better face search results. This will ensure Amazon Rekognition gets the best quality frame within the allocated bit rate. However, there is a downside to this: due to the low frame rate, the camera will miss fast motion in a scene. It is important to understand the trade-offs between these two parameters for a given set-up. For example, if the maximum possible bit rate is 1.5 MBPS, a camera can capture 1080p at 5 fps or 720p at 15 fps. The choice between the two is application dependent, as long as the recommended face resolution of 50x50 pixels is met.