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Avid workflow for alexa's prores & arriraw

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ori Dè rascher
Avid workflow for alexa's prores & arriraw
on Jan 5, 2014 at 8:24:29 pm

Hi everybody. I've just look 'round by the forums here but i've some difficult finding what I need.

As D.I.T. sometimes productions asking me to give an mxf transcode of the footage to the post house, and I just wanna be sure to send the material the perfect way.

I'll send an hard drive whit te Avid MediaFiles/MXF/(number of the shooting day) at the root level. I've just tried to ceck my transcoded files into Avid and everythings works fine. But my dubt are about the "round trip"

On first, if I shoot on alexa I do my transcodes whit davinci, both prores4444 or arriraw, and deliver in dnxhd36. I think my workflow in davinci is correct to preserve clip names timecode and metadata, but Iìm not sure about additional files like .ale .xml or similar that I've to send too. If I shoot prores the Alexa will generate an .ale file, how I've to use it? I've to copy it in the mxf subfolder or what? This .ale is needed to relink the dnxhd i've created in Davinci to the original prores footage,right? How this process works? (this is not my job but I just want to understand and do things thr right way)

If the footage was arriraw I'll do the same kind of transcode, but what about .ale? Whit the arriraw folder structure just an .xml is coming, what I've to send to the editor?Maybe I've to generate .ale or something in Davinci?

For the RED one,epic or scarlet is supposed to be easyer...if one have a redrocket card! I have not and as you know redcine is a good tool but it's really slow. Anyway, using redcine you can create a dnxhd whit .ale, and I suppose I have to send them the same way as above... But I know there's another way via Avid to create dnxhd from the proxies .mov of the camera (by creating them in redcine if you're not using a red one camera) doeas anybody knows about this workflow?

I'm so sorry but i really need to know how things works step-by-step.

Thanks everybody for your patience and help!!!

This town needs an enema! _The Joker

Mac Pro 3,1 2008 GeForce GTX 570 4 Gb RAM


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Michael Phillips
Re: Avid workflow for alexa's prores & arriraw
on Jan 6, 2014 at 12:11:25 am

I would suggest going through this whitepaper to get an overall idea of workflow and roundtrip considerations:
http://www.avid.com/static/resources/documents/whitepapers/digital_camera/d...

The difference between Redcine X and Resolve is that RCX can create an ALE as part of the encode process. Resolve also exports an ALE but you have to do it manually from the selects reel that was created during the dailies/sync process. The ALE gets merged into the bin's master clips in order to have all the metadata needed. With Alexa, it will also generate an ALE that can be merged into the masterclips. I have different tips, and things to be aware of on my blog site for MC workflows:
http://www.24p.com/wordpress


Michael


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ori Dè rascher
Re: Avid workflow for alexa's prores & arriraw
on Jan 6, 2014 at 3:11:11 am

Thank you very much Michael, I've just get a look to the white paper but too quickly, probably I'll found some other info there. But probably I can't understand the meaning of those workflows. I mean, if I import any kind of video file into Avid, Avid will turn it into an mxf dnxhd,right? So why people prefer to transcode whit other programs like da vinci scratch or more? Are they faster? And talkin about .ale, the metadata stored into it, are refered to a specific file name and timecode indistinctly from the file type? I mean, I can copy the .ale merged whit the alexa's pro res into the mxf folder and it will work? Or how can I create it through davinci?

Thank you very much

This town needs an enema! _The Joker

Mac Pro 3,1 2008 GeForce GTX 570 4 Gb RAM


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Michael Phillips
Re: Avid workflow for alexa's prores & arriraw
on Jan 6, 2014 at 8:08:33 pm

There are lots of reasons why people create dailies in third party applications. Some of which are:

1. Becomes someone else's responsibility
2. Editors are paid to edit, not transcode
3. Assistants are busy with organization, and if the DIT/Data Wrangler can do it, them one less thing to do.
4. AMA or import does not allow for specialized needs such as burn'ins, etc.
5. Some require color corrected dailies and syncing beforehand
6. etc.

The MXF wrapper only carries the basic metadata. All additional metadata is in the ALE file when available. This is added via a merge process.

Michael


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