The "Failed to initialize sound library." Error Appears When Recording Starts
When recording with oCam, sound-related errors may occur. To prevent this, it is important to first check whether sound playback is working properly on your PC. If you try to record on a PC where sound playback is not available, an error is likely to occur. Below is a detailed explanation of how to record with oCam in an environment where sound playback is unavailable and how to configure the settings to avoid errors.

If sound is not playing properly on your PC, you can solve the problem by disabling oCam's system audio recording feature. Please follow the steps below:
1. Launch the oCam main window.
2. In the main window, click the 'Sound' button.
3. When you click it, a pop-up menu will appear, and in most cases the 'Record System Audio' option will be checked by default.
4. Click the 'Record System Audio' item to uncheck it.
With this setting, oCam will not try to record system audio, so you can continue recording without errors even on a PC where sound playback is not available. This setting is especially useful in environments where system audio is not output due to sound driver problems or hardware issues.
Before recording, always check the sound playback status of your PC and apply the setting above if necessary to create a stable recording environment. If you want to resolve the sound playback issue more fundamentally, updating the sound driver or checking the device's sound settings is also a good approach.
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What to Do If the "WASRecord: pAudioClient->Initialize failed. (hr=0x80070005)" Error Occurs
The "WASRecord: pAudioClient->Initialize failed. (hr=0x80070005)" error can occur when microphone permission has been disabled on Windows 10 or later. This happens because oCam does not have the required permission to access the microphone. Below is a detailed explanation of how to resolve this issue.
For oCam to use the microphone properly, microphone access must be enabled in the Windows Privacy settings. Follow the steps below to check and adjust the setting:

1. Open the Windows Start menu and click 'Settings' (the gear icon).
2. In the Settings window, select 'Privacy'.
3. Click 'Microphone' in the left menu.
4. Check whether the 'Microphone access for this device' option is turned on. If it is turned off, click the switch to turn it on.
5. Check whether 'Allow apps to access your microphone' is turned on. If this setting is disabled, apps such as oCam cannot use the microphone. Make sure it is turned on, then save the setting.
After changing the setting, restart oCam and try recording with the microphone again. If the permission has been granted properly, the "WASRecord: pAudioClient->Initialize failed. (hr=0x80070005)" error is likely to be resolved.
If the problem continues, check the microphone device settings themselves in Control Panel > Sound > Recording tab, or try selecting the microphone input source again in oCam's 'Sound' settings. In addition, updating Windows and oCam to the latest version may also help.