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arm+linux+qt+opencv通过videocapture调用uvc免驱相机,...

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发表于 2019-5-22 14:34:29 | 显示全部楼层 |阅读模式
1.通过终端:v4l2-ctl --list-devices
        显示:/dev/video0
                 /dev/video1

显示两个设备,其实只接一个相机,这里猜测可能是两个视频格式。

2.通过qt配置opencv,调用vedio0,帧率只有10,通过videocapture.set()修改相机参数无效。

3.调用vedio1,出现错误:
(beta_camera:1360): GStreamer-CRITICAL **: 06:07:22.668:

Trying to dispose element videoconvert0, but it is in PAUSED instead of the NULL state.

You need to explicitly set elements to the NULL state before

dropping the final reference, to allow them to clean up.

This problem may also be caused by a refcounting bug in the

application or some element.
VIDEOIO ERROR:V4l2:could not obtain specifics of capture window。/dev/video1 does not support memory mapping

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