如何将FFMpeg获取的AVFrame转化为UIImage

Question

如何将FFMpeg获取的AVFrame转化为UIImage

以下方法可以用AVPicture来转，但是现在AVPicture已经弃用

• (UIImage*)imageFromAVFrame:(AVFrame *)avFrame
  {
  float width = avFrame->width;
  float height = avFrame->height;
  avpicture_free(&avPicture);
  avpicture_alloc(&avPicture, AV_PIX_FMT_RGB24, width, height); struct SwsContext * imgConvertCtx = sws_getContext(avFrame->width,

                                                   avFrame->height,
                                                   PIX_FMT_YUV420P,
                                                   width,
                                                   height,
                                                   AV_PIX_FMT_RGB24,
                                                   SWS_FAST_BILINEAR,
                                                   NULL,
                                                   NULL,
                                                   NULL);
  

  if(imgConvertCtx == nil) return nil; sws_scale(imgConvertCtx,

          avFrame->data,
          avFrame->linesize,
          0,
          avFrame->height,
          avPicture.data,
          avPicture.linesize);
  

  sws_freeContext(imgConvertCtx); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
  CFDataRef data = CFDataCreate(kCFAllocatorDefault,

                                             avPicture.data[0],
                                             avPicture.linesize[0] * height);
  

  CGDataProviderRef provider = CGDataProviderCreateWithCFData(data);
  CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
  CGImageRef cgImage = CGImageCreate(width,

                                   height,
                                   8,
                                   24,
                                   avPicture.linesize[0],
                                   colorSpace,
                                   bitmapInfo,
                                   provider,
                                   NULL,
                                   NO,
                                   kCGRenderingIntentDefault);
  

  UIImage *image = [UIImage imageWithCGImage:cgImage];
  CGImageRelease(cgImage);
  CGColorSpaceRelease(colorSpace);
  CGDataProviderRelease(provider);
  CFRelease(data); return image;
  }

清问如何在弃用AVPicture的情况下将AVFrame转化为UIImage