Determining the optimal stream settings to use to deliver video is difficult even if you’ve been
streaming for years.
Here are the settings that we recommend:
– Video codec: H.264
– Frame rate: 25 fps
– Keyframe frequency: 1 second
– Audio codec: AAC
– Audio bitrate: 128 Kbps, stereo
– Audio sample rate: 48000 Hz
Recommended video stream parameters:
| Profile | Resolution | Bitrate | |
| 240p | Baseline | 426×240 | 512 Kbps |
| 360p | Main | 640×360 | 1024 Kbps |
| 480p | Main | 854×480 | 1600 Kbps |
| 720p | Main | 1280×720 | 2640 Kbps |
| 1080p | Main | 1920×1080 | 4400 Kbps |
| 4K | High | 3840×2160 | 12000 Kbps |
To manually calculate the optimal bitrate, you can use the following formula:
bitrate = (resolution * frames per second * BPP) / 1000
where BPP (Bits per pixel) – average amount of bits applied to each pixel of a video.
BPP typically ranges from 0.05 to 0.150, depending on the amount of motion in the scene. The
more motion there is, the higher the BPP should be.
BPP examples:
– quiet video: BPP = 0.05
– average dynamic video: BPP = 0.08
– sports broadcast: BPP = 0.13