2.35 ratio Render

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Jason Chen

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2.35 ratio Render

PostFri Apr 28, 2017 9:05 am

I have a made a video edit in a 1920x1080 timeline in DaVinci Resolve. I tried applying output blanking 2.35 and render the video. It came out fine but has the black bars on top and bottom. How do I render it out without the black bars on the top and bottom. I tried changing the project settings to 1920x818 but it didn't work. Any help would be appreciated.
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Jim Simon

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 3:40 pm

If you want to export without the black bars, create and edit in a timeline matching the desired resolution.

I often use 1920 x 800 myself.
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John Paines

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:02 pm

Jim Simon wrote:If you want to export without the black bars, create and edit in a timeline matching the desired resolution.

I often use 1920 x 800 myself.


And you actually succeeded, doing that? What codec?
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Kays Alatrakchi

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:13 pm

Quicktime, mp4, m4v, mkv will support whichever resolution ratio is chosen. Most players (i.e. Smart TV's and of course computers) will play them back and pillarbox or letterbox as needed.

Having said that, nowadays most broadcasters and other industry distributors specifically request a 16X9 file even if it does include pillarbox or letterbox blanking as part of the video.
>>Kays Alatrakchi
Filmmaker based in Los Angeles, CA
www.mbkproductions.com
Resolve 15.3, Mac OS X 10.13.6 (High Sierra), i7 8700k, 32Gb DDR4 RAM, Dual GTX 1080ti, Decklink Mini Monitor, USB 3.1 RAID
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John Paines

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:14 pm

Again, did you actually try it and succeed? I think you'll end up with a 1920x1080 container no matter what the Resolve settings are. And, worse, actual picture dimensions can end up reduced.
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Luca Di Gioacchino

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:21 pm

I've done it and succeeded. Created a 1920 x 815 timeline, exported, and got a file of the same resolution.
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John Paines

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:26 pm

What was the native footage resolution? The timeline resolution? The deliver resolution? The delivery codec? Thanks.
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Jean Claude

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 4:29 pm

Luca Di Gioacchino wrote:I've done it and succeeded. Created a 1920 x 815 timeline, exported, and got a file of the same resolution.


I think of an error of typo 815 ...
In general, codecs accept modulo 8 or modulo 16 = 0

With which codec the 815?
Windows 10 PRO X64 1809 | DaVinci Resolve Studio 16.0.0B.022 | Fusion Studio 16.0.beta 24 build 24 | Decklink Studio 4K 6G | Desktop Video 11.1.00 | Nvidia 430.64
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Truls Aagedal

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 8:23 pm

Jean Claude wrote:I think of an error of typo 815 ...
In general, codecs accept modulo 8 or modulo 16 = 0




AFAIK modulus 8 and 16 isn't really a problem with newer devices/versions of h264, but was a bigger issue a few years ago, when h.264 was new. (?)
But to be safe I always try to keep the pixel count even.
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Lee Gauthier

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Re: 2.35 ratio Render

PostFri Apr 28, 2017 10:35 pm

Jason Chen wrote:I tried applying output blanking 2.35 and render the video.


Unless you're going for a pre-1970 vibe, you should be working with 2.39:1 aspect. 2.35:1 was deprecated by SMPTE in 1970 in favor of 2.39:1 for widescreen. All cinema, streaming and shiny discs conform to 2.39:1 (Some used 2.40 to make the math easier.)

That translates into 1920 x 800 or 1920 x 804.
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Jim Simon

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Re: 2.35 ratio Render

PostSat Apr 29, 2017 4:26 pm

John Paines wrote:And you actually succeeded, doing that? What codec?


Cineform.
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Marc Wielage

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Re: 2.35 ratio Render

PostSat Apr 29, 2017 11:07 pm

Be sure to turn off letterbox blanking prior to the render. And use Brad Allen's excellent "Aspect Ratio Cheat Sheet" as a guide:

unravel.com.au/files/Unravel_Resolution_CheatSheet.pdf
marc wielage, csi • VP/color & workflow • chroma | hollywood

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