Why isn't the "From Video Device" block in Simulink saving my manually-entered camera properties?

Question

Michael 2015-7-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/229821-why-isn-t-the-from-video-device-block-in-simulink-saving-my-manually-entered-camera-properties

编辑： Michael 2015-7-22

I am currently working on a project where I am trying to identify the location of different objects using a number of cameras with overlapping fields of view and a pretty simple triangulation method.

As of right now, I am just trying to record some sample footage from all of the cameras. My Simulink model simply consists of four From Video Device blocks calling the individual camera devices feeding into To Multimedia File blocks. However, for some reason, when I try to adjust the individual camera properties, the properties are not updating and saving. For example, I have been trying to set the Focus Mode to manual, and set the Focus to 0. However, once I close the properties window and hit OK in the block parameters block, the properties are not applied, and when I run my Simulink block the output video files do not reflect the properties I updated. I have not been able to figure out why the camera properties are not updating.

For reference, I am using (4) HD Pro Webcam C920 digital video cameras.

EDIT: For further context, I am using Matlab R2015a. Manually setting the same camera properties in the Image Acquisition App works fine, but does not carry over to any attempts at image acquisition by means other than that particular app.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Shankar Subramanian 2015-7-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/229821-why-isn-t-the-from-video-device-block-in-simulink-saving-my-manually-entered-camera-properties#answer_186871

Hi Michael,

This is a bug in R2015a with From Video Device block. Can you follow the steps in the External Bug Report that has been published?

Please post if you still run into issues.

Thanks

Shankar

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Michael 2015-7-22

编辑：Michael 2015-7-22

Thanks, I will look into the bug fix.

I managed to find a workaround for the issue. It seems that editing the camera properties did not register with the system as being a change, so hitting the "okay" button did not save changes. However, if I changed the camera source to a different camera, then changed it back to the original camera, and then changed the camera properties, the "apply" button would become available to click, which would then save the changes.

请先登录，再进行评论。

Why isn't the "From Video Device" block in Simulink saving my manually-entered camera properties?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

另请参阅

类别

标签

产品

Community Treasure Hunt

Why isn't the "From Video Device" block in Simulink saving my manually-entered camera properties?

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

另请参阅

类别

标签

产品

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论