解决集成 FFmpeg 时编译报错问题
由于 FFmpeg 依赖了很多个系统框架，所以在集成过程中很可能会遇到以下问题，只需要加上缺少的库就行了。下面列举的是集成 FFmpeg 3.1.11 版本时可能遇到的。
1、缺少 Security.framework
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Undefined symbols for architecture x86_64:
"_SSLClose", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
_tls_close in libavformat.a(tls_securetransport.o)
"_SSLCopyPeerTrust", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLCreateContext", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLHandshake", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLRead", referenced from:
_tls_read in libavformat.a(tls_securetransport.o)
"_SSLSetCertificate", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLSetConnection", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLSetIOFuncs", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLSetPeerDomainName", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLSetSessionOption", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SSLWrite", referenced from:
_tls_write in libavformat.a(tls_securetransport.o)
"_SecIdentityCreate", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SecItemImport", referenced from:
_import_pem in libavformat.a(tls_securetransport.o)
"_SecTrustEvaluate", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_SecTrustSetAnchorCertificates", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
ld: symbol(s) not found for architecture x86_64
2、缺少 VideoDecodeAcceleration.framework
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Undefined symbols for architecture x86_64:
"_VDADecoderCreate", referenced from:
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_VDADecoderDecode", referenced from:
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_vda_h264_end_frame in libavcodec.a(vda_h264.o)
"_VDADecoderDestroy", referenced from:
_ff_vda_destroy_decoder in libavcodec.a(vda_h264.o)
"_VDADecoderFlush", referenced from:
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_vda_h264_end_frame in libavcodec.a(vda_h264.o)
"_kVDADecoderConfiguration_Height", referenced from:
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_kVDADecoderConfiguration_SourceFormat", referenced from:
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_kVDADecoderConfiguration_Width", referenced from:
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_kVDADecoderConfiguration_avcCData", referenced from:
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
ld: symbol(s) not found for architecture x86_64
3、缺少 AudioToolbox.framework
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Undefined symbols for architecture x86_64:
"_AudioConverterDispose", referenced from:
_ffat_close_decoder in libavcodec.a(audiotoolboxdec.o)
_ffat_close_encoder in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterFillComplexBuffer", referenced from:
_ffat_decode in libavcodec.a(audiotoolboxdec.o)
_ffat_encode in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterGetProperty", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
_ffat_init_encoder in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterGetPropertyInfo", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
_ffat_init_encoder in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterNew", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
_ffat_init_encoder in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterReset", referenced from:
_ffat_decode_flush in libavcodec.a(audiotoolboxdec.o)
_ffat_encode_flush in libavcodec.a(audiotoolboxenc.o)
"_AudioConverterSetProperty", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
_ffat_init_encoder in libavcodec.a(audiotoolboxenc.o)
"_AudioFormatGetProperty", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
"_AudioFormatGetPropertyInfo", referenced from:
_ffat_create_decoder in libavcodec.a(audiotoolboxdec.o)
ld: symbol(s) not found for architecture x86_64
4、缺少 CoreMedia.framework
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Undefined symbols for architecture x86_64:
"_CMBlockBufferCopyDataBytes", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMBlockBufferCreateWithMemoryBlock", referenced from:
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_CMSampleBufferCreate", referenced from:
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_CMSampleBufferGetDataBuffer", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMSampleBufferGetDecodeTimeStamp", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMSampleBufferGetFormatDescription", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
_vtenc_output_callback in libavcodec.a(videotoolboxenc.o)
"_CMSampleBufferGetPresentationTimeStamp", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMSampleBufferGetSampleAttachmentsArray", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMSampleBufferGetTotalSampleSize", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CMTimeMake", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CMVideoFormatDescriptionCreate", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
"_CMVideoFormatDescriptionGetH264ParameterSetAtIndex", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
_get_params_size in libavcodec.a(videotoolboxenc.o)
_copy_param_sets in libavcodec.a(videotoolboxenc.o)
"_kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
"_kCMSampleAttachmentKey_NotSync", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_kCMTimeIndefinite", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_kCMTimeInvalid", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
ld: symbol(s) not found for architecture x86_64
5、缺少 CoreFoundation.framework
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Undefined symbols for architecture x86_64:
"_CFArrayCreateMutableCopy", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_CFArrayGetCount", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
_import_pem in libavformat.a(tls_securetransport.o)
"_CFArrayGetValueAtIndex", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
_tls_open in libavformat.a(tls_securetransport.o)
"_CFArraySetValueAtIndex", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
"_CFBooleanGetValue", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CFDataCreate", referenced from:
_ff_videotoolbox_avcc_extradata_create in libavcodec.a(videotoolbox.o)
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_vda_h264_end_frame in libavcodec.a(vda_h264.o)
_import_pem in libavformat.a(tls_securetransport.o)
"_CFDictionaryCreate", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CFDictionaryCreateMutable", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CFDictionaryGetValueIfPresent", referenced from:
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_CFDictionarySetValue", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CFNumberCreate", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_CFRelease", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_av_videotoolbox_default_free in libavcodec.a(videotoolbox.o)
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vda_h264_end_frame in libavcodec.a(vda_h264.o)
...
"_CFRetain", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
_vtenc_output_callback in libavcodec.a(videotoolboxenc.o)
_tls_open in libavformat.a(tls_securetransport.o)
"_CFStringCreateWithCString", referenced from:
_import_pem in libavformat.a(tls_securetransport.o)
"___CFConstantStringClassReference", referenced from:
CFString in libavcodec.a(videotoolbox.o)
CFString in libavcodec.a(videotoolbox.o)
CFString in libavcodec.a(videotoolbox.o)
"_kCFAllocatorDefault", referenced from:
_ff_videotoolbox_avcc_extradata_create in libavcodec.a(videotoolbox.o)
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vda_h264_end_frame in libavcodec.a(vda_h264.o)
...
"_kCFAllocatorNull", referenced from:
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_kCFBooleanFalse", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kCFBooleanTrue", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kCFCopyStringDictionaryKeyCallBacks", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kCFCoreFoundationVersionNumber", referenced from:
_vdadec_init in libavcodec.a(vda_h264_dec.o)
"_kCFTypeDictionaryKeyCallBacks", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_kCFTypeDictionaryValueCallBacks", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
ld: symbol(s) not found for architecture x86_64
6、缺少 CoreVideo.framework
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Undefined symbols for architecture x86_64:
"_CVBufferSetAttachments", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CVPixelBufferCreateWithPlanarBytes", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_CVPixelBufferGetBaseAddress", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferGetBaseAddressOfPlane", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferGetBytesPerRow", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferGetBytesPerRowOfPlane", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferGetPixelFormatType", referenced from:
_vda_decoder_callback in libavcodec.a(vda_h264.o)
"_CVPixelBufferGetPlaneCount", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferIsPlanar", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferLockBaseAddress", referenced from:
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
"_CVPixelBufferRelease", referenced from:
_videotoolbox_buffer_release in libavcodec.a(videotoolbox.o)
_ff_videotoolbox_uninit in libavcodec.a(videotoolbox.o)
_videotoolbox_decoder_callback in libavcodec.a(videotoolbox.o)
_release_buffer in libavcodec.a(vda_h264_dec.o)
_vda_old_h264_end_frame in libavcodec.a(vda_h264.o)
_ff_vda_output_callback in libavcodec.a(vda_h264.o)
_vda_h264_release_buffer in libavcodec.a(vda_h264.o)
...
"_CVPixelBufferRetain", referenced from:
_videotoolbox_decoder_callback in libavcodec.a(videotoolbox.o)
_vdadec_decode in libavcodec.a(vda_h264_dec.o)
_vda_decoder_callback in libavcodec.a(vda_h264.o)
_ff_vda_output_callback in libavcodec.a(vda_h264.o)
"_CVPixelBufferUnlockBaseAddress", referenced from:
_release_buffer in libavcodec.a(vda_h264_dec.o)
"_kCVImageBufferColorPrimariesKey", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferColorPrimaries_ITU_R_2020", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferColorPrimaries_ITU_R_709_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferGammaLevelKey", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferPixelAspectRatioHorizontalSpacingKey", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferPixelAspectRatioVerticalSpacingKey", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferTransferFunctionKey", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferTransferFunction_ITU_R_2020", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferTransferFunction_ITU_R_709_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferTransferFunction_SMPTE_240M_1995", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferTransferFunction_UseGamma", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferYCbCrMatrixKey", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferYCbCrMatrix_ITU_R_2020", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferYCbCrMatrix_ITU_R_601_4", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferYCbCrMatrix_ITU_R_709_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVImageBufferYCbCrMatrix_SMPTE_240M_1995", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVPixelBufferHeightKey", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVPixelBufferIOSurfacePropertiesKey", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
"_kCVPixelBufferPixelFormatTypeKey", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_ff_vda_create_decoder in libavcodec.a(vda_h264.o)
_ff_vda_default_init in libavcodec.a(vda_h264.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kCVPixelBufferWidthKey", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
_vtenc_init in libavcodec.a(videotoolboxenc.o)
ld: symbol(s) not found for architecture x86_64
7、缺少 VideoToolbox.framework
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Undefined symbols for architecture x86_64:
"_VTCompressionSessionCompleteFrames", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_frame in libavcodec.a(videotoolboxenc.o)
"_VTCompressionSessionCreate", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_VTCompressionSessionEncodeFrame", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_VTCompressionSessionPrepareToEncodeFrames", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_VTDecompressionSessionCreate", referenced from:
_av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
"_VTDecompressionSessionDecodeFrame", referenced from:
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_VTDecompressionSessionInvalidate", referenced from:
_av_videotoolbox_default_free in libavcodec.a(videotoolbox.o)
"_VTDecompressionSessionWaitForAsynchronousFrames", referenced from:
_videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
"_VTSessionCopyProperty", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_VTSessionSetProperty", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_AllowFrameReordering", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_AverageBitRate", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_ColorPrimaries", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_H264EntropyMode", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_MaxKeyFrameInterval", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_MoreFramesAfterEnd", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_MoreFramesBeforeStart", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_PixelAspectRatio", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_ProfileLevel", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_RealTime", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_TransferFunction", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTCompressionPropertyKey_YCbCrMatrix", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTEncodeFrameOptionKey_ForceKeyFrame", referenced from:
_vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
"_kVTH264EntropyMode_CABAC", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTH264EntropyMode_CAVLC", referenced from:
_vtenc_create_encoder in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_1_3", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_3_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_3_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_3_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_4_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_4_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_4_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_5_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_5_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_5_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Baseline_AutoLevel", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_3_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_3_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_3_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_4_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_4_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_4_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_5_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_5_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_5_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_High_AutoLevel", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_3_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_3_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_3_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_4_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_4_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_4_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_5_0", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_5_1", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_5_2", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTProfileLevel_H264_Main_AutoLevel", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
"_kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder", referenced from:
_vtenc_init in libavcodec.a(videotoolboxenc.o)
ld: symbol(s) not found for architecture x86_64
8、缺少 libz.tbd
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Undefined symbols for architecture x86_64:
"_compress", referenced from:
_encode_strip in libavcodec.a(tiffenc.o)
"_compress2", referenced from:
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_flashsv_encode_frame in libavcodec.a(flashsvenc.o)
"_deflate", referenced from:
_encode_frame in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_encode_frame in libavcodec.a(lclenc.o)
_encode_frame in libavcodec.a(zmbvenc.o)
"_deflateBound", referenced from:
_encode_png in libavcodec.a(pngenc.o)
_encode_apng in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_encode_frame in libavcodec.a(lclenc.o)
"_deflateEnd", referenced from:
_png_enc_close in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_flashsv_encode_end in libavcodec.a(flashsvenc.o)
_encode_end in libavcodec.a(lclenc.o)
_encode_end in libavcodec.a(zmbvenc.o)
"_deflateInit2_", referenced from:
_png_enc_init in libavcodec.a(pngenc.o)
"_deflateInit_", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_encode_init in libavcodec.a(lclenc.o)
_encode_init in libavcodec.a(zmbvenc.o)
"_deflateReset", referenced from:
_encode_frame in libavcodec.a(pngenc.o)
_encode_frame in libavcodec.a(lclenc.o)
_encode_frame in libavcodec.a(zmbvenc.o)
"_inflate", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_zlib_refill in libavformat.a(swfdec.o)
_decode_frame_common in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_http_read_stream in libavformat.a(http.o)
_zlib_decomp in libavcodec.a(lcldec.o)
...
"_inflateEnd", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_swf_read_close in libavformat.a(swfdec.o)
_decode_frame_apng in libavcodec.a(pngdec.o)
_decode_frame_png in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_init in libavcodec.a(flashsv.o)
_flashsv_decode_end in libavcodec.a(flashsv.o)
...
"_inflateInit2_", referenced from:
_http_read_header in libavformat.a(http.o)
"_inflateInit_", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_swf_read_header in libavformat.a(swfdec.o)
_decode_frame_apng in libavcodec.a(pngdec.o)
_decode_frame_png in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_init in libavcodec.a(flashsv.o)
_flashsv2_decode_init in libavcodec.a(flashsv.o)
...
"_inflateReset", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_zlib_decomp in libavcodec.a(lcldec.o)
_decode_frame in libavcodec.a(tscc.o)
_zerocodec_decode_frame in libavcodec.a(zerocodec.o)
_decode_frame in libavcodec.a(zmbv.o)
"_inflateSync", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
"_uncompress", referenced from:
_id3v2_read_internal in libavformat.a(id3v2.o)
_mov_read_cmov in libavformat.a(mov.o)
_swf_read_packet in libavformat.a(swfdec.o)
_decode_frame in libavcodec.a(cscd.o)
_decode_frame in libavcodec.a(dxa.o)
_decode_block in libavcodec.a(exr.o)
_g2m_decode_frame in libavcodec.a(g2meet.o)
...
(maybe you meant: _ff_snappy_peek_uncompressed_length, _ff_snappy_uncompress , _ff_lzf_uncompress )
"_zlibCompileFlags", referenced from:
_http_read_header in libavformat.a(http.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
9、缺少 liblzma.tbd
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Undefined symbols for architecture x86_64:
"_lzma_code", referenced from:
_decode_frame in libavcodec.a(tiff.o)
"_lzma_end", referenced from:
_decode_frame in libavcodec.a(tiff.o)
"_lzma_stream_decoder", referenced from:
_decode_frame in libavcodec.a(tiff.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
10、缺少 libbz2.tbd
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Undefined symbols for architecture x86_64:
"_BZ2_bzDecompress", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
"_BZ2_bzDecompressEnd", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
"_BZ2_bzDecompressInit", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
ld: symbol(s) not found for architecture x86_64
11、缺少 libiconv.tbd
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Undefined symbols for architecture x86_64:
"_iconv", referenced from:
_avcodec_decode_subtitle2 in libavcodec.a(utils.o)
"_iconv_close", referenced from:
_avcodec_open2 in libavcodec.a(utils.o)
_avcodec_decode_subtitle2 in libavcodec.a(utils.o)
"_iconv_open", referenced from:
_avcodec_open2 in libavcodec.a(utils.o)
_avcodec_decode_subtitle2 in libavcodec.a(utils.o)
ld: symbol(s) not found for architecture x86_64
12、缺少 libz.tbd
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Undefined symbols for architecture x86_64:
"_compress", referenced from:
_encode_strip in libavcodec.a(tiffenc.o)
"_compress2", referenced from:
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_flashsv_encode_frame in libavcodec.a(flashsvenc.o)
"_deflate", referenced from:
_encode_frame in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_encode_frame in libavcodec.a(lclenc.o)
_encode_frame in libavcodec.a(zmbvenc.o)
"_deflateBound", referenced from:
_encode_png in libavcodec.a(pngenc.o)
_encode_apng in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_encode_frame in libavcodec.a(lclenc.o)
"_deflateEnd", referenced from:
_png_enc_close in libavcodec.a(pngenc.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_flashsv_encode_end in libavcodec.a(flashsvenc.o)
_encode_end in libavcodec.a(lclenc.o)
_encode_end in libavcodec.a(zmbvenc.o)
"_deflateInit2_", referenced from:
_png_enc_init in libavcodec.a(pngenc.o)
"_deflateInit_", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
_encode_init in libavcodec.a(lclenc.o)
_encode_init in libavcodec.a(zmbvenc.o)
"_deflateReset", referenced from:
_encode_frame in libavcodec.a(pngenc.o)
_encode_frame in libavcodec.a(lclenc.o)
_encode_frame in libavcodec.a(zmbvenc.o)
"_inflate", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_zlib_refill in libavformat.a(swfdec.o)
_decode_frame_common in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_http_read_stream in libavformat.a(http.o)
_zlib_decomp in libavcodec.a(lcldec.o)
...
"_inflateEnd", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_swf_read_close in libavformat.a(swfdec.o)
_decode_frame_apng in libavcodec.a(pngdec.o)
_decode_frame_png in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_init in libavcodec.a(flashsv.o)
_flashsv_decode_end in libavcodec.a(flashsv.o)
...
"_inflateInit2_", referenced from:
_http_read_header in libavformat.a(http.o)
"_inflateInit_", referenced from:
_matroska_decode_buffer in libavformat.a(matroskadec.o)
_swf_read_header in libavformat.a(swfdec.o)
_decode_frame_apng in libavcodec.a(pngdec.o)
_decode_frame_png in libavcodec.a(pngdec.o)
_decode_text_chunk in libavcodec.a(pngdec.o)
_flashsv_decode_init in libavcodec.a(flashsv.o)
_flashsv2_decode_init in libavcodec.a(flashsv.o)
...
"_inflateReset", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
_zlib_decomp in libavcodec.a(lcldec.o)
_decode_frame in libavcodec.a(tscc.o)
_zerocodec_decode_frame in libavcodec.a(zerocodec.o)
_decode_frame in libavcodec.a(zmbv.o)
"_inflateSync", referenced from:
_flashsv_decode_frame in libavcodec.a(flashsv.o)
"_uncompress", referenced from:
_id3v2_read_internal in libavformat.a(id3v2.o)
_mov_read_cmov in libavformat.a(mov.o)
_swf_read_packet in libavformat.a(swfdec.o)
_decode_frame in libavcodec.a(cscd.o)
_decode_frame in libavcodec.a(dxa.o)
_decode_block in libavcodec.a(exr.o)
_g2m_decode_frame in libavcodec.a(g2meet.o)
...
(maybe you meant: _ff_snappy_peek_uncompressed_length, _ff_snappy_uncompress , _ff_lzf_uncompress )
"_zlibCompileFlags", referenced from:
_http_read_header in libavformat.a(http.o)
ld: symbol(s) not found for architecture x86_64
总结
死记这些没一点用，反而会浪费脑细胞，只要找到通用解决方法才好，你可以问度娘，但是度娘也不知道怎么办？
下面就来看下出错信息吧，比如:
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Undefined symbols for architecture x86_64:
"_SSLClose", referenced from:
_tls_open in libavformat.a(tls_securetransport.o)
_tls_close in libavformat.a(tls_securetransport.o)
"_SSLCopyPeerTrust",
……
可以看到是因为 _SSLClose 这个符号未定义导致了出错，而这个符号是在 tls_open 这个方法里使用的。tls_open 方法就在 libavformat 库里 tls_securetransport.c 文件中，因此找到 tls_securetransport.c 这个文件，你会发现:
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#include <Security/Security.h>
#include <Security/SecureTransport.h>
所以就知道了，FFmpeg 需要 Security.framework 这个框架。
