ffmpeg安卓开发
时间: 2023-11-20 22:56:26 浏览: 158
FFmpeg是一个跨平台的音视频处理工具,可以在Android平台上进行开发。以下是在Android Studio中使用FFmpeg的步骤:
1.下载FFmpeg的Android编译工具链,例如Android NDK。
2.在Android Studio中创建一个新项目,并在项目的build.gradle文件中添加以下代码:
```gradle
android {
...
defaultConfig {
...
externalNativeBuild {
cmake {
cppFlags "-std=c++11 -frtti -fexceptions"
abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
}
}
}
...
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
}
```
3.在项目的根目录下创建一个CMakeLists.txt文件,并添加以下代码:
```cmake
cmake_minimum_required(VERSION 3.4.1)
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/native-lib.cpp )
# FFmpeg库的路径
set(pathToFFmpeg /path/to/ffmpeg)
# 添加头文件路径
include_directories(${pathToFFmpeg}/include)
# 添加库文件路径
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -L${pathToFFmpeg}/libs/${ANDROID_ABI}")
# 添加需要链接的库文件
target_link_libraries( # Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib}
avcodec
avfilter
avformat
avutil
swresample
swscale )
```
4.在项目的cpp目录下创建一个native-lib.cpp文件,并添加以下代码:
```cpp
#include <jni.h>
#include <string>
#include <android/log.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/avutil.h>
#include <libswscale/swscale.h>
}
#define LOG_TAG "FFmpeg"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
extern "C" JNIEXPORT jstring JNICALL
Java_com_example_ffmpegdemo_MainActivity_stringFromJNI(
JNIEnv* env,
jobject /* this */) {
std::string hello = "FFmpeg version: ";
hello += av_version_info();
return env->NewStringUTF(hello.c_str());
}
```
5.在MainActivity.java文件中调用native方法,并添加以下代码:
```java
static {
System.loadLibrary("native-lib");
}
public native String stringFromJNI();
```
6.运行项目,即可在Android设备上查看FFmpeg的版本信息。
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