EXR - tape Id embedded in header as exr/owner

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waltervolpatto

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EXR - tape Id embedded in header as exr/owner

PostThu Mar 07, 2013 5:09 pm

Hello gentlemen.

EXR is becoming faster the format to go for ACES workflow.

For what I understand, Resolve does not embed, nor read any tag in a EXR file format that contain a "tape Id/owner" information for conform.

This is the situation:
we have 100 shots that have timecode/tape ID embedded and used to conform a piece of trailer.
The editorial is using this embedded info to assemble and give back an EDL/AAF
we re-conform and all is good!

then those DPX will be transformed thru NUKE to ACES colorspace 16bit half float and re-loaded (for client request we have to work in ACES)

now the timecode is there but the tape ID is gone altogether. EXR by default want to use (in resolve) the folder name that has nothing to do with the embedded tape ID.

To test it, I did an export from resolve of a dpx and an EXR and re-import back in: the DPX retaines tape ID and timecode, the EXR retained the timecode and lost the Tape ID.

In NUKE I can see the metadata in the header of both and there is correctly the tape id in the DPX header, where there is nothing in the EXR.

now looking at the file format (http://www.sno.phy.queensu.ca/~phil/exi ... enEXR.html) there is no "tape ID" per se, however it can be create (set a new key=exr/tape_id {value} in nuke) but it might be not standard.
Another system (Quantel...) use the existing tag [exr/owner] to read/write the tape ID info.
Nuke is agnostic and can pass the value if needed.

I think my questions are:
1) how you implemented a workflow where tape id information is essential using EXR?
2) can we force to read from the [exr/owner] tag?


Any feedback will be appreciated.
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Peter McAuley

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Re: EXR - tape Id embedded in header as exr/owner

PostThu Mar 07, 2013 6:14 pm

I believe there are read and write nodes in Nuke for metadata. Check the write node to make sure all the appropriate meta data fields are going across.
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waltervolpatto

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Re: EXR - tape Id embedded in header as exr/owner

PostThu Mar 07, 2013 7:27 pm

yes you're correct and the issue is not to create/fill the exr/owner tag, is the fact that resolve completely ignore it :twisted:
W10-19043.1645- Supermicro MB C9X299-PGF - RAM 128GB CPU i9-10980XE 16c 4.3GHz (Oc) Water cooled
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Paul Carlin

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Re: EXR - tape Id embedded in header as exr/owner

PostFri Dec 20, 2013 3:06 am

The issue, as you said, is not the ability to embed the TAPE ID, but rather convincing the software to read the embedded TAPE ID.

The solution, as I'm sure you've already come to, is to use the folder names for the TAPE ID. Directory structure is a mostly universal way or reading TAPE IDs in most conform products.

- Paul
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Jiri Sindelar

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Re: EXR - tape Id embedded in header as exr/owner

PostMon Nov 21, 2016 3:02 pm

Hi,
Is there any update on this? Does resolve now read tape id/ reel metadata from Exr header?

Thank you,
Jirka
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waltervolpatto

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Re: EXR - tape Id embedded in header as exr/owner

PostMon Nov 21, 2016 6:08 pm

the owner field works now
W10-19043.1645- Supermicro MB C9X299-PGF - RAM 128GB CPU i9-10980XE 16c 4.3GHz (Oc) Water cooled
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Jiri Sindelar

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Re: EXR - tape Id embedded in header as exr/owner

PostTue Nov 22, 2016 7:45 am

Thank you Walter!
Jirka
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Steve Swisz

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Re: EXR - tape Id embedded in header as exr/owner

PostMon Dec 10, 2018 7:28 pm

Hey Guys,
We are on the Latest and Greatest version Resolve running MAC, we created EXR from Camera Raw to Deliver plates for VFX.
Has anyone heard if Resolve will support or add EMB Reel/Tape for EXR Files.

Aware that conform can be using the Directory as REEL/TAPE NAME but it would make things so much easier if that Metadata can be be baked into the EXR files we create.

Thanks All!

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