How to use the GPU to capture usb camera

[振杰司徒]

Board : IMX6Q

System: Linux

Kernel: 3.14

I use the V4L2 to read the usb camera, and then displayed on the qt with cpu, although successful, but it is not smooth.

Therefore, I want to use the GPU to read and display the usb camera. Is there any information or examples?

thank you very much.

[振杰司徒]

This is my related functionality with qt, but consuming 120ms with QPiamap :: loadfromData and 148ms with QPixmap ::

save. Is there a more optimized way?

[igorpadykov]

Hi  振杰

please look at sect.13.2 Unit Test for gpu tests atatched Linux Manual.

Seems for camera better to use gstreamer, it is described in Linux Guide

sect.7 Multimedia, use nxp bsps described on

http://www.nxp.com/products/software-and-tools/software-development-tools/i.mx-software-and-tools/i....

Best regards
igor
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[振杰司徒]

thanks for your reply

But I'm worried I can not fully implement my function on a 720P camera by using gstreamer. Because I not only need to

display, but also saved as pictures and udp transmission.