What to Do If Minecraft Crashes as Soon as You Start Recording with oCam (NVIDIA Graphics Card)

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In Java-based applications that use CUDA, including oCam, problems may occur when certain NVIDIA drivers are installed. In particular, if NVIDIA driver version 378.49 (or some other versions) is installed, a bug may occur where the app crashes with the error "Stack cookie instrumentation code detected a stack-based buffer overrun" when calling the CUDA initialization function `cuInit`.


This issue is not a bug in oCam itself, but a problem with the NVIDIA driver that affects all applications that use CUDA. Therefore, the same error may occur not only in oCam but also in other CUDA-based Java applications.


To resolve this issue, you need to update the NVIDIA driver to the latest version, 378.66 or later. Follow the steps below to update the driver:


1. Go to the official NVIDIA website (geforce.com/drivers).

2. Select your graphics card model and operating system, then search for the latest driver (version 378.66 or later).

3. Run the downloaded driver installer and proceed with the installation.

4. After the installation is complete, restart your computer and run oCam or another CUDA-based application to check whether the issue has been resolved.


Updating the driver to version 378.66 or later will resolve the CUDA initialization crash issue and allow you to use oCam and other related applications normally. If the problem continues even after installing the latest driver, contact NVIDIA Support or check for the latest version of oCam.

Another helpful tip

oCam Advanced Settings - Capture

 


oCam is a multifunctional program that not only supports screen recording but also provides a screen capture feature, allowing users to save specific moments on the screen as images easily. In the settings window that appears when you click the "Tools - Options" menu, the "Capture" category on the left provides options for adjusting settings related to screen capture. This tab is designed so users can customize the details of the capture feature, and it can be used intuitively by everyone from beginners to IT professionals. Below is a detailed explanation of the main settings in the "Capture" category.


Overview of the Capture Feature

The settings in the "Capture" category are the options that apply when you click the "Capture" button in the main oCam window or press the default hotkey (F3). Through these settings, users can choose the format of the captured image and decide whether to include additional elements such as the mouse cursor. The capture feature is very useful when creating tutorials, preparing software documentation, or saving a specific moment on the screen.


Include Mouse Cursor

The "Include Mouse Cursor" option determines whether the mouse cursor will be included in the captured image. By default, this option is unchecked, so the mouse cursor is not included in captured images. This is suitable when you want a clean image. However, if you want to highlight the cursor position for lecture materials or software usage guides, you can check this option to include the cursor in the image. For example, when capturing the process of clicking a specific button, including the cursor can make the material visually clearer.


Image File Format for Capture

The "Image File Format for Capture" setting lets you choose the file format used to save captured images. oCam supports several image formats, and by default it is set to PNG. PNG is the most recommended format because it provides lossless compression, allowing you to save clear images without any loss in quality. Other supported formats may include JPEG and BMP. JPEG is useful when you want to reduce file size, but it may cause some loss of image quality. Users can choose the most appropriate format by considering storage space, image quality requirements, or compatibility with a particular platform.


Usage Tips

The settings in the "Capture" category are simple, but they play an important role in improving how captured images can be used. For example, when creating tutorials, enabling the "Include Mouse Cursor" option can clearly show where the user is clicking or interacting. Using PNG format by default helps maintain high image quality, making it suitable for professional documentation. On the other hand, if minimizing file size is important, you can choose JPEG format to save storage space. If you often use the capture hotkey (F3), changing it to a different key or becoming familiar with it can also help improve your workflow.


In addition, if you want to review and edit captured images immediately after saving them, it is a good idea to set the save location in advance in oCam. This makes it easier to find and use captured images quickly. If you are capturing the UI of specific software or a game screen, be sure to define the capture area accurately so that unnecessary parts are not included.