Including libavcodec.so and Utilizing Unreal Engine 4.23.1 for Android System Programs
When developing Android system programs using Unreal Engine 4.23.1, it is often necessary to include external libraries to expand functionalities. One such library is the FFmpeg library, which can be dynamically linked to convert sampling rates of sounds. This article will discuss how to include the libavcodec.so library in your Unreal Engine 4.23.1 project and utilize it for Android system programs.
Adding libavcodec.so to Your Project
To add the libavcodec.so library to your Unreal Engine project, follow these steps:
- Download the FFmpeg source code from the official website or use a package manager like apt-get or brew.
- Configure and compile the FFmpeg library to generate the required shared library file (
libavcodec.so). - Copy the
libavcodec.sofile to your Unreal Engine project'sPlugins/Android/libs/armeabi-v7aorPlugins/Android/libs/arm64-v8adirectory, depending on the target architecture.
Using libavcodec.so in Your Project
Once the libavcodec.so library is included in your project, you can utilize it within your C++ code. Follow these steps:
- In your Build.cs file, include the required headers:
#include <FFmpeg/avcodec.h>
- Link the FFmpeg library to your project by adding it to the
PublicDependencyModuleNameslist:
public FString[] PublicDependencyModuleNames = new FString[]
{
"libavcodec", // Add libavcodec here
...
};
- In your C++ source file, include the required headers as in step 1.
- Load the FFmpeg library dynamically using the platform-specific function
FPlatformProcess::GetDllHandle():
void* FFmpegLibrary = FPlatformProcess::GetDllHandle("libavcodec.so");
if (FFmpegLibrary == nullptr)
{
UE_LOG(LogTemp, Error, TEXT("Failed to load libavcodec.so"));
return;
}
- Use the FFmpeg functions, such as
avcodec_open2(),avcodec_decode_audio4(), and others, within your code while checking for errors and handling them gracefully. - Unload the FFmpeg library once you're done using it:
FPlatformProcess::FreeDllHandle(FFmpegLibrary);
Key Concepts
- Including external libraries in Unreal Engine projects
- Dynamic linking of libraries in Android system programs
- Utilizing FFmpeg for sound processing in Unreal Engine projects