Thursday, January 12, 2017

Re: [Avid-L2] 30fps vs 29.97 Semantics

 

I agree with you on this but I also realize it's easy for me to back seat quarterback production.  I bet they have a zillion fires to put out in their work, but it does seem like square one stuff to ask the Production Company and Post what kind of material we prefer and expect.

I'm giddy when someone bothers to put camera bars into a file.  I know bars may seem irrelevant to some but they at least give me a chance to possibly access the media food chain.  Bars actually helped me determine that Panasonic's VLog transform has an aspect of quadrature shift in the bars vector dots which leads me to believe it's a bad idea to use the Vlog transform as an output LUT for anything other than a straight conversion.  Had I not had some bars from the camera I would have never noticed the quadrature shift.

I'm really hoping when Avid revamps the Symphony Color Corrector many of my issues will be solved.  ;-)  I read they are developing in a "User Centric" way to cater to the user's needs didn't I???



---In Avid-L2@yahoogroups.com, <cutandcover@...> wrote :

It's my opinion that if you're dealing with someone who doesn't understand why you want it a certain way, or doesn't know to ask, or just goes off on his own and gathers material the way they want without care to what the production requires, then yes, this is not professional. We have to uphold a level here. If we don't, then we're just agreeing with every marketing release that says anybody can do this stuff.

On Thu, Jan 12, 2017 at 2:39 PM, bigfish@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
 

"Professionals understand this stuff"
Oh if only this were true in my world.  My next 4K project has 4096_2160, our deliver format, footage as well as 5K, 6K and some other odd size.  We deliver 1.9:1 4096x2160 but they shot the 5K and 6K in 16:9 format for absolutely no reason other than they could.  Nobody asked for it to be shot in varying sizes.  In some cases it was a shoot in a different country but even here in the good ole USA when the crew was told to match the out of country shoot they didn't shoot 4096x2160 but opted for 6K or 5K at 16:9. 

I'm getting to learn more about frame flex etc... but a complete waste of time and effort.  These are relatively large multicam stage show shoots so it's hard for me to believe there aren't a number of professionals on the crew.  It seems production just wants to flip every switch and use all the options even when they are not requested.  It seems no matter what post says in the field they just do whatever the hell they feel like and leave it in our laps to sort out.

Given the systemic nature of these issues I really get the impression many professionals don't understand all this new stuff.  Shooting Log format in an 8 bit codec comes to mind as an example of production drinking the LUT Koolaid and leaving me with footage that gets flagged in QC with solarized blacks, which I take to mean quantizing/banding like errors they see which are a byproduct of stretching the log material back out.  It was pointed out to me by one of the L2 QC gurus that 8 bit and shooting log is asking for trouble.  And don't get me started on the boneheads that shoot log for chromakey work on the 8 bit formats. 



---In Avid-L2@yahoogroups.com, <cutandcover@...> wrote :

If somebody says "we're shooting 30" and you're not already friends, they are an AMATEUR or a HOBBYIST and you could expect a mix of frame rates and resolutions from them. Professionals understand this stuff needs to be specific and will be thorough about telling you what you're getting.

This is 2017.

On Thu, Jan 12, 2017 at 11:18 AM, David Dodson davaldod@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
 

Understood. But being as I exist mainly in the feature world, there is a HUGE difference between 23.98 and true 24. We don't use shorthand since the the consequences can be dire. In other words, me no like shorthand.


David Dodson



On Jan 12, 2017, at 8:01 AM, Shane Ross <shanerosseditor@...> wrote:

30fps is many peoples shorthand for 29.97. 


Shane

Sent from my pocket calculator. 

On Jan 12, 2017, at 7:24 AM, 'Dom Q. Silverio' domqsilverio@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

 

30.00 fps does exist. You can create a project for it. DNX codec types are the exact same ones for 29.97 (145 / 220).

But I would double check that. 30 fps is not an on air standard. It is likely a digital delivery (video games, YouTube, etc.).


Dom Q. Silverio

On Thu, Jan 12, 2017 at 10:13 AM, David Dodson davaldod@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:


I'm being told an incoming show is shooting '30fps' using a Canon XF300. But is there really such thing as '30fps'? Might they actually be shooting 29.97? And if that's true, then what DNxHD resolution should I ask them to transcode to if the goal is to cut at a good resolution for pilot submission? 220x should be fine, right?

Thanks!


David Dodson










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