Related to your example LwIP_StreamingServer in STM32Cube_FW_F7_V1.17.0. what was the achieved FPS on the remote client side at QQVGA & the latency?

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Hi @Community member​ ,

Thank you for your request,

Performance tests are in progress,

We will keep you updated as soon as we have your required information.

[MSG_ST]

Hi @Community member​ ,

For LwIP_StreamingServer application :

• FPS is around 19.5 frames/sec
• Latency is around 1.5 second

Please note that the application available under STM32Cube_FW_F7_V1.17.0 package need a fix (An Internal ticket ID 142051 is already created) to be functional :

• ETH_RX_BUFFER_CNT value (defined on ethernetif.c) must be adjusted to fit LwIP pool (MEM_SIZE = 16Kb)

I hope my answer helps.

Regards

Mahdy

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@Mahdy Sghaier​ 

Thank you very much for your answer. i have other questions.

What is the cause of the drop in the FPS. i would assume its not the JPEG compression since the resolution is QQVGA (160*120) and according to AN4996 Application note page 31 it should be possible to compress QQVGA and maintain 30FPS unless you reduce the camera clock to that FPS for other reason.

Second question is what is the cause of the 1.5 latency on the VLC side?

is it from the VLC side and if it is then how can we reduce it?

Can we use other application?

Regards

Mahmoud