音视频相关

Xcode导入过sdl的项目中导入ffmpeg后报错：

"_CMBlockBufferCreateWithMemoryBlock", referenced from:
    _videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_CMSampleBufferCreate", referenced from:
    _videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms", referenced from:
    _av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)  
"_CMVideoFormatDescriptionCreate", referenced from:
   _av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

1.png

解决方法：  导入 CoreMedia.framework

11.png