int8_t* 转 AVFrame,int8_t数据是yuv420，完整代码

以下是将int8_t类型的YUV420数据转换为AVFrame的完整代码：

#include <iostream>
#include <cstring>
#include <cstdint>

extern "C" {
#include <libavutil/avutil.h>
#include <libavutil/frame.h>
#include <libswscale/swscale.h>
}

using namespace std;

AVFrame* convertInt8tToAVFrame(int8_t* int8tData, int width, int height) {
    AVFrame* frame = av_frame_alloc();
    if (!frame) {
        cerr << "Error allocating AVFrame" << endl;
        return nullptr;
    }

    // Set the frame dimensions and format
    frame->format = AV_PIX_FMT_YUV420P;
    frame->width = width;
    frame->height = height;

    // Allocate the buffer for the frame
    int ret = av_frame_get_buffer(frame, 32);
    if (ret < 0) {
        cerr << "Error allocating frame buffer: " << av_err2str(ret) << endl;
        av_frame_free(&frame);
        return nullptr;
    }

    // Copy the YUV420 data into the frame
    int8_t* srcData[3] = {int8tData, int8tData + width * height, int8tData + width * height * 5 / 4}; // YUV420P format
    int srcLineSize[3] = {width, width / 2, width / 2};
    ret = av_image_copy_frame_data(frame, srcData, srcLineSize, &srcLineSize[0], AV_PIX_FMT_YUV420P, width, height);
    if (ret < 0) {
        cerr << "Error copying image data: " << av_err2str(ret) << endl;
        av_frame_free(&frame);
        return nullptr;
    }

    return frame;
}

int main() {
    // Create some sample int8_t YUV420 data
    int width = 640;
    int height = 480;
    int numPixels = width * height;
    int8_t* int8tData = new int8_t[numPixels * 3 / 2]; // YUV420P format
    memset(int8tData, 0, numPixels * 3 / 2);

    // Convert the int8_t data to an AVFrame
    AVFrame* frame = convertInt8tToAVFrame(int8tData, width, height);
    if (!frame) {
        cerr << "Error converting int8_t data to AVFrame" << endl;
        return 1;
    }

    // Do something with the AVFrame...

    // Free the AVFrame and int8_t data
    av_frame_free(&frame);
    delete[] int8tData;

    return 0;
}

在上面的代码中，`convertInt8tToAVFrame()`函数接受一个`int8_t*`类型的YUV420数据指针，以及图像的宽度和高度。它首先分配一个AVFrame并设置其属性，然后为帧分配缓冲区。最后，它将int8_t数据复制到AVFrame中，然后返回该帧。`main()`函数是一个简单的测试程序，它创建一些示例int8_t YUV420数据，将其转换为AVFrame，然后释放资源。注意，为了正确地将int8_t数据复制到AVFrame中，我们必须将其转换为一个包含三