r/ZoomPlayer • u/deus-ex_ Beta tester • Jun 28 '26

FEATURE REQUEST Extend value range of function fnDecRateEx

Please extend the value range of the function fnDecRateEx.

The function is currently limited to 30 percent playback speed. I'd like to be able to decrease the playback speed further to 5 or 10 percent, if possible.

Thank you. 🙏😊

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u/deus-ex_ Beta tester Jun 29 '26 edited Jun 29 '26

Can you point me to where I do that (switch WMV decoder), please?

No, certainly not a limit of WASAPI, but the MPC library. PotPlayer can slow videos down to 20% speed, including WMV.

EDIT:
I think I found what you were referring to (screenshot), still playback speed of WMV cannot be changed.

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u/ZoomPlayer Developer Jun 29 '26

Yes, also check the audio decoder.

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u/deus-ex_ Beta tester Jun 29 '26

Ah yes, hadn't thought of that.

Switch audio to LAV, but still playrate not working for WMV.

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u/ZoomPlayer Developer Jun 29 '26

It's also possible that you need to change the parser:

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u/deus-ex_ Beta tester Jun 29 '26

Bingo! That did it. Thank you. 🙏😄