[FFmpeg-devel] FFMPEG convert keeping metadata

[Luys8611]

Hello devel Team.
I'm luys and I need a help for ffmpeg converting.
I have a .m4a file which has metadata such as speaker channel data.
I need a command line to convert it to .wav file preserving all metadata.
Or, it's also good that I can read those metadata by ffmpeg commend without converting.
I tried it according to several google articles, but failed all.
I'd appreciate your help on this issue.
Thanks

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