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equinor / segyio

Fast Python library for SEGY files.
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create a new segy crop #400

Closed StefosGeo closed 5 years ago

StefosGeo commented 5 years ago

Hello,

I am trying to create a segy file from scratch using this example https://github.com/equinor/segyio/blob/master/python/examples/make-file.py

I want the samples start counting for example from 900 not from zero. So I tried this spec.samples = range(900,1950,3)

but in the end the output segy file has sapmling counting from 0 with step 3.

Thanks

jokva commented 5 years ago

Hi,

whimian just struggled with the same thing: https://github.com/equinor/segyio/issues/397

The short answer is that segyio doesn't write headers for you by default, because it assumes you want to add more information to them which would trigger a write anyway, so you need to manually set the delay-recording-time header word.

Please re-open or create a new issue if you still have problems.