libavcodec.a(/) is not an object file (not allowed in a library)

[jinwuwu001]

I compiled the ffmpeg static library locally and when using libtool static to merge multiple static libraries, the following error occurred
libtool -static libffaudio.a /Users/billyjin/Desktop/project/ffaudio/vendor/ffmpeg/mac/arm64/libavcodec.a libavformat.a libavutil.a libswresample.a libswscale.a -o libffaudio.a

error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libavcodec.a(/) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libavcodec.a(//) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libavformat.a(/) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libavutil.a(/) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libavutil.a(//) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libswresample.a(/) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libswresample.a(//) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libswscale.a(/) is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: libswscale.a(//) is not an object file (not allowed in a library)
Use ar -t to view the static library members as follows
ar -t libswscale.a
hscale.o
output.o
swscale.o
swscale_unscaled.o
yuv2rgb_neon.o
alphablend.o
gamma.o
hscale.o
hscale_fast_bilinear.o
input.o
options.o
output.o
rgb2rgb.o
slice.o
swscale.o
swscale_unscaled.o
utils.o
vscale.o
yuv2rgb.o