Batched-push-timeout and nvstreammux_latency

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Please provide complete information as applicable to your setup.

• Hardware Platform Jetson
• DeepStream Version 6.2
• JetPack Version (valid for Jetson only)
• TensorRT Version 5.1.1
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type questions
• I set batched-push-timeout=66000，but in nvstreammux， some component_latency is over 66ms， such as 127.543945 and more
**• streammux:
batch-size: 8
batched-push-timeout: 66000
width: 736
height: 736
live-source: 1
compute-hw: 2
**

2

Is it the live stream?

3

For the live stream the frames reach to the client randomly, the timeout is just for the current batch, if the frame’s timestamp is too far away from current batch, it may be stored for the next batch.

5

Does this problem occur because the camera data reaches the device unsteadily？

6

Not sure.

7

The latency between nvv4l2decoder6 out_system_timestamp and nvstreammux-stream-muxer in_system_timestamp is very big, such as 1738995277056-1738995276764=292ms. What causes this problem?

8

Can you post the log?

9

BATCH-NUM = 1359**
Comp name = nvv4l2decoder7 in_system_timestamp = 1738995276858.433105 out_system_timestamp = 1738995276858.663086 component latency= 0.229980
Comp name = nvstreammux-stream-muxer source_id = 0 pad_index = 0 frame_num = 1242 in_system_timestamp = 1738995277056.356934 out_system_timestamp = 1738995277190.112061 component_latency = 133.755127
Comp name = nvv4l2decoder1 in_system_timestamp = 1738995276763.915039 out_system_timestamp = 1738995276764.166016 component latency= 0.250977
Comp name = nvstreammux-stream-muxer source_id = 1 pad_index = 1 frame_num = 1214 in_system_timestamp = 1738995277056.374023 out_system_timestamp = 1738995277190.112061 component_latency = 133.738037
Comp name = nvv4l2decoder4 in_system_timestamp = 1738995276810.559082 out_system_timestamp = 1738995276810.802002 component latency= 0.242920
Comp name = nvstreammux-stream-muxer source_id = 2 pad_index = 2 frame_num = 1228 in_system_timestamp = 1738995277056.517090 out_system_timestamp = 1738995277190.113037 component_latency = 133.595947
Comp name = nvv4l2decoder6 in_system_timestamp = 1738995276794.656982 out_system_timestamp = 1738995276794.914062 component latency= 0.257080
Comp name = nvstreammux-stream-muxer source_id = 3 pad_index = 3 frame_num = 1242 in_system_timestamp = 1738995277056.361084 out_system_timestamp = 1738995277190.113037 component_latency = 133.751953
Comp name = nvv4l2decoder2 in_system_timestamp = 1738995276898.403076 out_system_timestamp = 1738995276899.646973 component latency= 1.243896
Comp name = nvstreammux-stream-muxer source_id = 4 pad_index = 4 frame_num = 1241 in_system_timestamp = 1738995277056.342041 out_system_timestamp = 1738995277190.114014 component_latency = 133.771973
Comp name = nvv4l2decoder3 in_system_timestamp = 1738995276849.001953 out_system_timestamp = 1738995276849.254883 component latency= 0.252930
Comp name = nvstreammux-stream-muxer source_id = 6 pad_index = 6 frame_num = 1214 in_system_timestamp = 1738995277056.302979 out_system_timestamp = 1738995277190.114014 component_latency = 133.811035
Comp name = nvv4l2decoder5 in_system_timestamp = 1738995277110.022949 out_system_timestamp = 1738995277113.750977 component latency= 3.728027
Comp name = nvstreammux-stream-muxer source_id = 7 pad_index = 7 frame_num = 1221 in_system_timestamp = 1738995277115.701904 out_system_timestamp = 1738995277190.114014 component_latency = 74.412109
Comp name = primary-nvinference-engine in_system_timestamp = 1738995277190.210938 out_system_timestamp = 1738995277201.356934 component latency= 11.145996
Source id = 0 Frame_num = 1242 Frame latency = 343.020996 (ms)
Source id = 1 Frame_num = 1214 Frame latency = 437.539062 (ms)
Source id = 2 Frame_num = 1228 Frame latency = 390.895020 (ms)
Source id = 3 Frame_num = 1242 Frame latency = 406.797119 (ms)
Source id = 4 Frame_num = 1241 Frame latency = 303.051025 (ms)
Source id = 6 Frame_num = 1214 Frame latency = 352.452148 (ms)
Source id = 7 Frame_num = 1221 Frame latency = 91.431152 (ms)

10

It is hard to say. You may need to check whether there are frame lost.

11

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