Apply image filter to camera on Linux

One interesting part of camera is to apply filter to the output images/videos. Under Linux operating systems, we can use the v4l2-utils to achieve this.

Read More

Share Comments

Check USB camera supported output format on Linux

On Linux, v4l-utils is one excellent tool for camera debugging, and it can help to check USB camera information.

Read More

Share Comments

Fix Ubuntu problem change desktop background not working

Sometimes, after some Ubuntu updates or switch to different themes, you might notice that the change desktop background is not working. One of the common problem is that, the gnome settings for background is not set to active. So we just need to active the setting in order to make it work.

Read More

Share Comments

Update WordPress custom styles

When you want to make a lot of style changes to the WordPress sites, you will want to create a new child theme. However, sometimes creating a new child theme over one or two little updates on styles seem to be too overkilled. In this situation, I prefer to add a custom style directly, which can be achieved by Jetpack Custom CSS plugin.

After installation, you can see the Edit CSS menu under Appearance. You can do anything with CSS here to update current theme styles.

Remember: when you change theme, your custom CSS will be reset!

Share Comments

Using PSR-4 namespace with PHPSpec

When you’re trying to generate a new spec, phpspec will assume that PSR-0 will be used, which means,

Read More

Share Comments