Black frames using python demo deepstream_imagedata-multistream

[jkompis]

• Jetson Nano
• DeepStream 6.0.1
• JetPack Version 4.6.2
• TensorRT Version 8.2.1
• How to reproduce the issue

Hello I have an issue running python demo from GitHub - NVIDIA-AI-IOT/deepstream_python_apps: DeepStream SDK Python bindings and sample applications (tag v1.1.1)

./deepstream_imagedata-multistream.py file:///home/ds-test/sample_720.h264 out_pics

First two saved detections are always blank.

Console output for all frames looks clean.

It would look like the buffer containing frame is empty by the time it is accessed.o

[yuweiw]

You can refer the link below to get the picture from the nvbufsurface directly to verify the original buffer.
https://forums.developer.nvidia.com/t/deepstream-sdk-faq/80236/17