HarmonyOS 视频编解码出现花屏

// 解码场景，收到输出 Buffer 后 
OH_AVFormat *format = OH_VideoDecoder_GetOutputDescription(decoder); 
int widthStride = 0; 
int32_t heightStride = 0; 
bool ret = OH_AVFormat_GetIntValue(format, OH_MD_KEY_VIDEO_STRIDE, widthStride); 
if (ret) { 
  // Error 
} 
bool ret = OH_AVFormat_GetIntValue(format, OH_MD_KEY_VIDEO_SLICE_HEIGHT, heightStride); 
if (ret) { 
  // Error 
} 
OH_AVFormat_Destroy(format); 
 
// 编码场景，收到输入 Buffer 后 
OH_AVFormat *format = OH_VideoEncoder_GetInputDescription(encoder); 
int widthStride = 0; 
bool ret = OH_AVFormat_GetIntValue(format, OH_MD_KEY_VIDEO_STRIDE, widthStride); 
if (ret) { 
  // Error 
} 
OH_AVFormat_Destroy(format);

int32_t ReadYUV420P(std::shared_ptr<VideoEncSignal> &signal, uint8_t *addr, int32_t width, int32_t height, 
int32_t stride) 
{ 
  if (width == 0) { 
    return 0; 
  } 
  int32_t pixelSize = int32_t(stride / width); 
  width *= pixelSize; 
  // Y 
  for (int32_t i = 0; i < height; ++i) { 
  signal->inFile_->read(reinterpret_cast<char *>(addr), width); 
  addr += stride; 
} 
  width >>= 1; 
  stride >>= 1; 
  // UV 
  for (int32_t i = 0; i < height; ++i) { 
  signal->inFile_->read(reinterpret_cast<char *>(addr), width); 
  addr += stride; 
} 
  return stride * height * 3 / 2; // 3: nom, 2: denom 
}