How to Record Microphone and System Audio
Below is a detailed guide on how to record audio and configure the settings in oCam.
Recording System Audio by Default
When you start screen recording with oCam, system audio is recorded automatically by default. This includes all sounds played on your computer, such as video audio, game sound effects, and system notification sounds. This setting is applied immediately without any extra steps, making it very convenient for users who want to record only system audio. For example, when recording gameplay footage or creating software tutorial videos, you can capture only the system audio cleanly.
Recording Microphone Audio as Well
If you want to record microphone audio together with system audio, you only need to adjust the settings slightly in oCam. First, click the "Sound" button on the main screen of oCam. A pop-up window for sound settings will then appear. In this window, a list of available microphone devices is shown, and you can select the microphone you want to use. For example, if you are using an external microphone or a headset microphone, simply select and enable that device. Through this process, both system audio and microphone audio are recorded at the same time, which is very useful when creating lecture videos or recordings that require live narration.
Applying the Audio Recording Settings
Once you select the microphone and complete the settings, oCam immediately applies them. After that, when you start recording, both system audio and microphone audio will be recorded together. This feature is especially effective for situations where both your voice and system sound need to be captured at the same time, such as YouTube content creation, online classes, or game streaming. To make sure the settings have been applied correctly, it is a good idea to run a short test recording and check whether the audio is being recorded properly.
Disabling Audio Recording
Sometimes you may want to capture only the screen video without recording any sound at all. In that case, uncheck the "Record System Audio" option in the sound settings window of oCam, and select "Do Not Record Microphone" in the microphone settings as well. With this configuration, oCam records only the screen video without any sound, which is suitable for tasks where a silent video is needed, such as when you plan to add background music separately later.
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What to Do If Minecraft Crashes as Soon as You Start Recording with oCam (NVIDIA Graphics Card)
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.