Is mp4mux not able to accept absolute paths for input files on Windows machines?  Having trouble when using absolute paths, always receiving error: ERROR: unsupported input type 'C'

Have tried quotes around paths with no success. Using relative paths is ok and works just fine?
mp4mux ERROR: unsupported input type 'C'
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : mp4mux ERROR: unsupported input type 'C'
Issue date:

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Is mp4mux not able to accept absolute paths for input files on Windows machines?  Having trouble when using absolute paths, always receiving error: ERROR: unsupported input type 'C'

Have tried quotes around paths with no success. Using relative paths is ok and works just fine?
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