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Author Topic: Aspect Ratio Calculator Paul Shuttleworth Film Handler Posts: 11 From: Stockport Cheshire UK Registered: Sep 2015 posted 01-06-2019 09:15 AM                     I have been asked to provide a pixel by pixel specification of aspect ratios ranging from Academy to Cinemascope. (1:375, 1:66, 1:85, 2:39) Is there a calculator or details of recommended ratio for a 2K projector online? For example 16:9 would be 1920x1080  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 01-06-2019 09:43 AM                        There is a discussion of this in an old thread. The conclusion seemed to be that these were the correct dimensions: 1.33: 1440x1080 1.37: 1480x1080 1.66: 1792x1080 1.78: 1920x1080 1.85: 1998x1080 2.39: 2048x858 There has been some variance on how 2.2:1 (70mm) is handled on DCPs. Some put it in the full container (does anyone know those dimensions?) and others pillarbox it into the scope dimensions. [ 01-06-2019, 05:47 PM: Message edited by: Adam Martin ]  |  IP: Logged Paul Shuttleworth Film Handler Posts: 11 From: Stockport Cheshire UK Registered: Sep 2015 posted 01-06-2019 10:03 AM                     Thanks Scott, That's brilliant!  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 01-06-2019 11:49 AM                     Scott - there is no strict ruling in DCI or SMPTE, but: --- ISDCF recommended practice that for aspect ratios under 1.85 (such as academy aperture 1.33) pillar box in a flat package. For aspect ratio from 1.85 to 2.30 letter box in a flat package. For aspect ratios above 2.30 letter box in a scope package. --- So, 2.2:1 should come in a flat container, and be padded with black/letterboxed from 1998*908 to 1998*1080 for 2k. e.g. http://www.cinematography.com/index.php?showtopic=67434 http://www.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=16;t=003059#000000 General consensus is that the 'C' Full Container should not be used for regular distribution content, only for test purposes or special applications. - Carsten  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 01-06-2019 04:43 PM                     BTW - in the above table, DCI Scope/2.39:1 is wrong, it is 2048*858  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 01-06-2019 04:53 PM                        Typo. Thanks for the correction. Interesting about the ISCDF recommendations, but it makes sense as far as avoiding the need to create additional screen/lens files for common-height-masked cinemas.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 01-06-2019 05:53 PM                     Yes, I think that is the 'ratio' (pun...) behind it. Also, keep in mind that some systems generate format cues automatically from container flags (TMS spl generators/templates), so, using only F and S is the more robust scheme. Also, I am pretty sure that many human operators nowadays wouldn't know what to do if a 'C' turns up. - Carsten  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 01-06-2019 10:13 PM                     quote: Carsten Kurz many human operators nowadays wouldn't know what to do if a 'C' turns up Call her a B and tell her to F off! Thanks, I'll be here all week.  |  IP: Logged Carl Martin Phenomenal Film Handler Posts: 1424 From: Oakland, CA, USA Registered: Feb 2002 posted 01-07-2019 03:17 AM                        ha ha, thank you brother adam! i've found that if it isn't 1.78, 1.85, or scope, all bets are off as to what dimensions will be used for the various ratios. i have so many damn screen and lens files for what some fool thinks is the best way to have "mastered" or "remastered" their movie.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 01-07-2019 09:56 AM                        Another one: 1.19 ("Early sound special" (UK) or "Movietone" (USA) ratio) is 1,290 x 1,080 (2K) and 2,580 x 2,160 (4K).  |  IP: Logged

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