Export orthomosaic with custom size

[vish]

My orthomosaic is currently

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25114 x 22819 and I want to export it such that it is only 5000 pixels wide, while maintaining scale.

I tried running

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chunk.exportRaster(path="test.tif", width=5000) but it doesn't work and I get

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RuntimeError: TIFFWriteTile: unexpected error: test.tif
I don't want to explicitly change pixel size as I don't know what size will get me a 5000 pixel wide orthomosaic. I know the GUI has an option 'Max. dimension (pix)'. Is there something similar I can do using the python API?