$F variable not recognized?

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$F variable not recognized?

Postby doca » Mon Jan 18, 2021 2:16 pm

doca Mon Jan 18, 2021 2:16 pm
Hi,

I'm on Windows 7 with Houdini 18.5.351 with Octane 20.1.5.3.
Trying to render a sequence and only single file being written and overwritted.
This is my Image file path/prefix:$HIP/render/$OCTANE_PASS.$F

Any clue?

Thanks.
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Re: $F variable not recognized?

Postby juanjgon » Mon Jan 18, 2021 2:42 pm

juanjgon Mon Jan 18, 2021 2:42 pm
Can you please try with $HIP/render/$OCTANE_PASS-$F to check if it helps? I've seen problems before while using "." and "_" between variables.

Thanks,
-Juanjo
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Re: $F variable not recognized?

Postby galleon27 » Mon Jan 18, 2021 5:42 pm

galleon27 Mon Jan 18, 2021 5:42 pm
Had this problem when rendering png sequences. Adding the extension (.png, .exr) fixes this problem.

juanjgon wrote:Can you please try with $HIP/render/$OCTANE_PASS-$F to check if it helps? I've seen problems before while using "." and "_" between variables.


Houdini doesn't play well with hyphens. This is from their documentation:
"Do not use a hyphen to separate the frame number from the name (for example frame-$F.pic). MPlay will interpret the resulting filenames (frame-1.pic, frame-2.pic, frame-3.pic, and so on) as containing negative frame numbers (-1, -2, -3, …)."
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Re: $F variable not recognized?

Postby doca » Thu Jan 21, 2021 9:59 am

doca Thu Jan 21, 2021 9:59 am
Thanks Galleon,

That sorted things out.
@Juan might be worth setting better defaults or updating houdini doc pages with this info?

Cheers.
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