H.264 live frames missing 0x0 0x0 0x1 start byte pattern

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1

I have Protocol Integration implementation of h.264 live streaming using XProtect Professional+ version 12.2.7113.1, Device Pack 9.7a version 9.7.1.119. The camera model is AXIS P3225-LVE Mk II.

The received frames though are missing the h.264 start byte pattern {0x0, 0x0, 0x1}. After inserting those 3 bytes I am getting live frames successfully.

Please advise if that’s expected behavior, and if not what should be changed.

2

Hi Ruslan,

I am not sure if you get the data from the camera or you are using some other source.

I can tell you however that H264 we accept is the AnnexB implementation, meaning the prefix accepted it [0x00, 0x00, 0x00, 0x01] or [0x00, 0x00, 0x01].

so when the cameras send the data it is prefixed. We expect the frame separators to be present otherwise there is no way to distinguish frame start from data.

BR,

Artur.

3

Hi Artur,

Thank you very much. I believe the culprit is in my code byte offsets.

Regards,

Ruslan