Posts Tagged ‘Video’

Unity: Making a simple audio visualization

Click here to read Unity: Making a simple audio visualization

As stated in the title, this Unity programming tutorial shows how to create a simple audio visualizer. This post focuses on explaining the necessary requirements in obtaining the audio data from the current music being played, and how to process this data to create a audio visualization. It won’t have detailed explanations on how to create a specific effect for an audio visualization. The code featured below and the example project were created and tested in Unity 3.5.2 .

For this post, the audio spectrum data will be displayed as a line using a LineRenderer component and will also feature some cubes that will fall from the top of the waveform, much like the little white bars above the spectrum found on the Windows Media Player “Bars” visualization. However, this visualization will be 3D and not 2D and will render a waveform and not bars.

To achieve that, a script and the following elements will be required: (more…)

Unity: How to playback fullscreen videos using the GL class

Click here to read Unity: How to playback fullscreen videos using the GL class

This Unity programming tutorial explains how to use the immediate mode rendering available at the GL class for the playback of video files. There is already another post here on 41 Post that shows how to do the same thing using GUITexture component. However, in this tutorial, a quad is going to be rendered and the video will be played at its texture.

Not only the steps required for achieving fullscreen video playback are going to be explained, but how to properly scale the video based on the screen dimensions is also featured in this post. Warning: this tutorial works only with Unity Pro because the free version doesn’t support video decoding. This post has been created and tested in Unity version 3.4. At the end of the post, a Unity project featuring all the code explained here is available for download both in C# and JavaScript.

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Android: take a picture without displaying a preview

Click here to read Android: take a picture without displaying a preview

Accessing hardware functionality when programming for an Android device is generally quite straightforward. The same can be said about writing an Activity that takes a picture, but Android requires a preview of what the camera will capture to be displayed prior to capturing an image. This post explains how to “cheat” this requirement imposed by the OS, and how to write an application that takes a picture and displays it.

An Eclipse project with all the code explained here is available for download at the end of the post.

Before going into the Activity code, the interface layout (the main.xml file) must be edited to add a Surface View and an Image View to the interface. To add an element, just drag and drop it from the list inside your layout, like this: (more…)

Unity: How to use a GUI Texture to play fullscreen videos

Click here to read Unity: How to use a GUI Texture to play fullscreen videos

Warning: this tutorial only works with Unity Pro because the free version doesn’t come with video playback support. The code was created and tested with Unity version 3.3. It won’t work for versions 2.6 and below (requires some adaptation).

This Unity post explains how to set up a GUI Texture at the Unity editor and the code necessary to play a fullscreen video, that can be used for the studio logo animation at the beginning of the game, the game’s intro or any other video that needs to take the whole screen. It also explains how to properly scale the video based on the screen dimensions. At the end of the post, a Unity project featuring all the code explained here is available for download.

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Android: Retrieving the Camera preview as a Pixel Array

Click here to read Android: Retrieving the Camera preview as a Pixel Array

This post explains how to take the live images created by Android’s camera preview feature and return them as a RGB array, that can be used to all sorts of things, like custom effects preview and real-time image filtering. This post used the CameraPreview class that already comes bundled with Android’s SDK because it has everything already set-up, that way is just a matter of inserting more code. The techniques shown here works with Android 2.1 and should work with versions 1.6 and 1.5.

The first thing to do is to import the API Demos project to your Workspace. To do that, in Eclipse, click File -> New -> Android Project. In the dialog that has just opened, give the project a name at the first field (like API Demos 8) and select ‘Create project from existing source’. Now browse to <Android SDK folder>\samples\android-7\ApiDemos. Finally, mark Android 2.1 as the Build Target and click Finish: (more…)

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