[rtmpdump] How to change download progress display in rtmpdump 2.1?

[ol kk]

Hello,I downloaded and tried the latest windows build of rtmpdump
It works fine,but how to change the download progress display? It shows the
hashes values/hex numbers instead of the download percentage right now
I don't like that,and it downloads much slower right now because of that
Please guide me how to change it
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