merger file error

[ducthanh150796]

I compiled your libraly. I want merger two files mp3 and this is my String array:
"f" , "concat" , "-i" , pathFileMerger , "-c", "copy" , pathOut
But I received an error:
java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.mysoft.audio-1/base.apk"],nativeLibraryDirectories=[/data/app/com.mysoft.audio-1/lib/arm64, /data/app/com.mysoft.audio-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]] couldn't find "libffmpeg.so"
Can you help me? Thanks you very much.

[duncanokeyo]

compile ffmpeg to support that architecture arm64-v8a

[mansiJspaceo]

can you please give me brief idea which Ndk version & ffmpeg version you use for build ffmpeg
when i build with ndk19, ndk20 it gives error while build.