Question How to record video during a phone call?

Hendrix7 said:

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It appears that Android OS imposes the limit that only one app can access the microphone at a time. Is there anything rooted users can do to get around it?

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Short answer:

While it's theoretically possible to bypass Android's microphone restriction with root access, it's complex and involves significant technical expertise.

Long answer:

Android's microphone management is deeply integrated into the system. Overriding this behavior requires a deep understanding of Android's audio system, kernel modules, and potential interactions with other system components.

Here are some potential approaches, but they are highly technical and not guaranteed to work:

Custom Kernel Modules:

• Develop a custom kernel module to directly access microphone hardware, bypassing the Android audio framework. This is extremely complex and requires deep kernel knowledge.
• Risks: Instability, security vulnerabilities, and potential conflicts with other system components.

System-Level Audio Server:

• Replace the default audio server with a custom one that manages microphone access differently. This involves modifying system files and rebuilding the system image.
• Risks: System instability, security vulnerabilities, and potential app compatibility issues.

Audio Hardware Abstraction Layer (HAL) Modification:

• Modify the audio HAL to allow multiple apps to access the microphone simultaneously. This requires deep understanding of the audio hardware and HAL interface.
• Risks: Hardware incompatibility, audio quality issues, and potential system instability.

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