Low Latency¶
These tables show what performance you can expect from USB 3.2 Gen 1 (5 Gbps) connection with an OAK camera. XLink chunking was
disabled for these tests (pipeline.setXLinkChunkSize(0)).
What |
Resolution |
FPS |
FPS set |
Time-to-Host [ms] |
Bandwidth |
Histogram |
|---|---|---|---|---|---|---|
Color (isp) |
1080P |
60 |
60 |
33 |
1.5 Gbps |
|
Color (isp) |
4K |
28.5 |
30 |
150 |
2.8 Gbps |
|
Mono |
720P/800P |
120 |
120 |
24.5 |
442/482 Mbps |
|
Mono |
400P |
120 |
120 |
7.5 |
246 Mbps |
Time-to-Host is measured time between frame timestamp (
imgFrame.getTimestamp()) and host timestamp when the frame is received (dai.Clock.now()).Histogram shows how much Time-to-Host varies frame to frame. Y axis represents number of frame that occured at that time while the X axis represents microseconds.
Bandwidth is calculated bandwidth required to stream specified frames at specified FPS.
Encoded frames¶
What |
Resolution |
FPS |
FPS set |
Time-to-Host [ms] |
Histogram |
|---|---|---|---|---|---|
Color video H.265 |
4K |
28.5 |
30 |
210 |
|
Color video MJPEG |
4K |
30 |
30 |
71 |
|
Color video H.265 |
1080P |
60 |
60 |
42 |
|
Color video MJPEG |
1080P |
60 |
60 |
31 |
|
Mono H.265 |
800P |
60 |
60 |
23.5 |
|
Mono MJPEG |
800P |
60 |
60 |
22.5 |
|
Mono H.265 |
400P |
120 |
120 |
7.5 |
|
Mono MJPEG |
400P |
120 |
120 |
7.5 |
You can also reduce frame latency by using Zero-Copy branch of the DepthAI.
Got questions?
We’re always happy to help with code or other questions you might have.
