Michael Phillips
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COW Coin
Forum Replies Created
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Doing some research into the archives of different forums, I came across the following from Adam Wilt. So regardless of what solution you find, it will never be clean and will always include some frame blending.
Michael
Cutting to the chase: CF24 cherry-picks fields from the camera’s 60i video stream to simulate the juddery motion of 24p. However, the motion is worse (more uneven, more syncopated) than true 24p imagery, and it cannot be reverse-telecined to get smooth 24fps imagery. CF24 is fine as a special effect if you’re staying on video at 60i, but it’s not suitable for a true 24fps feel, nor will it work for film-outs: the motion is too unsmooth, and the vertical resolution of the image is damaged. For film-outs, shoot at 60i and use a program like DVFilm’s Maker or your film-out facility’s own in-house process to convert 60i to 24p.
Cineframe 24 appears to be mixing and matching a witches’ brew of field-doubled, frame-based, and synthesized images in its five frame cycle.
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Interesting frame size – if you are willing to send me a sample, I will take a look at it in Media Composer and try some different frame rate conversions for you. use wetransfer.com or filemail.com to send to: michael[at]24p[dot]com
Michael
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I need to confirm, but I don’t think the OMFI folder created new ones as there is no sub-folder hierarchy within OMF folder as there is with MXF. Taht is one of the advantages of using MXF.
Michael
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If you are making Avid native media via Resolve, you need to create OPAtom and not OPAtom 1a. Then select the codec you want to work with , such as DNxHD 145, etc. Those files go directly into the numbered folders found in the Avid managed Avid MediaFiles/MXF folder structure at the root level of the each of the drives.
You cannot drag OPAtom files onto a bin. This has been a long time request to allow that to happen, then move/copy files to the Avid MediaFiles folder and associate with project…
Once you do copy files to this folder, you either need to generate an AAF for the “dailies” out of Resolve or from a bin, navigate to the numbered folder where the files reside and import the mob.msm file (can’t recall full name of file, not in front of a system. Only one of those two .msm files will import. When it does, it creates the master clips.
Michael
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OK – you have a lot of issues fighting you for quality here.
1. Slow shutter creates more movement within the field/frame that a faster/higher shutter speed
2. Interlace also has motion in one half the frame (odd lines) and different motion in the second half the frame (even fields)
3. With interlace, you have one set of motion that is half the horizontal resolution of the format being shot. For example an interlace frame of 1080 HD is actually made up of two fields of 1920×540.This is where hardware-based convertors earn their reputation for higher quality as they do a lot of motion estimation and such when doing conversions.
You can get pretty good quality with software conversions – Twixtor has a good reputation and can be used as a free trial (watermarked).
You can try different motion adapters in Media Composer for different quality, but due to the above 3 bullet points it will not be great.
If you can get away with slomo (20%), then you can deinterlace, have 29.97p frames, then play that back as 23.976 frame for frame.
Michael
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I am assuming it was shot interlace? So there are 59.94 fields of motion every second? Or was it shot progressive at either 29.97p or 59.94p. This changes the way one might approach the problem. At the end of the say, it will either be a frame for frame slomo – which means no artifacts but everything is slower, or frame rate manipulation to create 23.976 progressive frames from 59.94 fields or frames.
Michael
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Can it be slow motion, or does it have to be “at speed”?
Michael
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Seems like a few DNxIO boxes are making their way out into the wild – perhaps an early beta for some folks? In the meantime, I came across this comment on the “Avid Editors of Facebook” page on Facebook:
” I am waiting on the new Avid version of the BM box and was told I would have to Uninstall all my software down to the base OS, install the box and its drivers and re-install, interplay, protools, media composer, davinci, in that order.”
Maybe that is for early stage installs, but seems a bit excessive?? Maybe so that it can encode DNxHR from 2K/4K signals?
Michael
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Certainly for standalone systems where the indexing does not slow down systems it works fairly well. And while it works well enough, it could certainly use some refinement to really make it a standout feature.
Michael
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And that’s a whole other unfortunate issue!
Michael