Return-Path: Received: from mail-ey0-f169.google.com ([209.85.215.169] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP-TLS id 4757283 for AE-List@media-motion.tv; Tue, 26 Jun 2012 13:27:24 +0200 Received: by eaan1 with SMTP id n1so1536323eaa.28 for ; Tue, 26 Jun 2012 04:30:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=cLfO98FLWnTOyzOYcvAQeBzyQrKnOn5B+wep3mSDH8s=; b=SMJOQl8vpKVMjjJuIXqfMOcWA7mMCIyLhEdtbTOSItrzgcGrEZLeLpuAtIFGlkjsdT TPtaHHWmSjEOvz8sMPMSZEgWF/4jbVYu030k6VRIXnb60mMi8x3KHPCWEtBHddh6XGLV aDXNgB5miD00FNVLa/3q5H9q2tKjCRr5J8VYBaMHdvLqVWwKlV93Y6tIczvkOnsvdnm5 OGPxeYPUpZGqPLz1o6R1eA5Q2BTPIxJfclUvnCFPRHeGteM8zy1Jb62hyILS35XxQscY o8ft+TWaIGfWRCEPgBya07q44k47BYOr9bTAp7xohxrj1dGcTeItPUpHL/R5LMCg8kt8 ecXg== Received: by 10.14.119.67 with SMTP id m43mr2525335eeh.81.1340710230848; Tue, 26 Jun 2012 04:30:30 -0700 (PDT) Return-Path: Received: from [10.0.0.2] (host217-43-81-200.range217-43.btcentralplus.com. [217.43.81.200]) by mx.google.com with ESMTPS id p41sm148067146eef.5.2012.06.26.04.30.28 (version=SSLv3 cipher=OTHER); Tue, 26 Jun 2012 04:30:29 -0700 (PDT) Message-ID: <4FE99D54.7080205@gmail.com> Date: Tue, 26 Jun 2012 12:30:28 +0100 From: Perry Mitchell User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:9.0) Gecko/20111220 Thunderbird/9.0 MIME-Version: 1.0 To: After Effects Mail List Subject: Re: [AE] frame rate weirdness References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------020200050600020507020301" This is a multi-part message in MIME format. --------------020200050600020507020301 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit To be fair - digital SD had a bumpy ride for a few years integrating with previous analog 'standards' - many of which were only approximate due to generous windows of values. Camera manufacturers had different interpretations in deciding exactly what was the correct aspect ratio. The great thing about HD is that we all started with a clean slate (on aspect ratio and frame size). The frame rate issue is very unfortunate. What started as an engineering fudge way back at the start of NTSC (changing 30 to 29.97fps) is now apparently preserving itself in history for no obvious reason other than simulcasting HD/SD. Do you guys in the US still have NTSC broadcasting? Perry Mitchell On 23/06/2012 17:41, Stephen van Vuuren wrote: > > This just came up last night on our local film/video list (Raleigh, NC > area). > > Someone was needing to make as “a perfect quality SD 20:9” H.264 file > and could not figure out the pixel dimensions as they are “not good at > math”. Advice was tossed out about letterboxing SD with no reference > to SD using two difference non-square pixels nor the fact the native > “20:9” footage would not be considered “SD” as it meets no standard. > Nor the fact that 2000 x 900 pixels is 20:9 etc. etc. > > It’s all good to sleep through class and FB or skip the chapters if > self-taught, but considering how often frame rates, sizes, interlacing > etc. comes up – it seems like a career problem if you can’t solve > these issues on your own. > > *stephen van vuuren* > > 336.202.4777 > > ** > > *http://www.sv2dcp.com/* > > *http://www.sv2studios.com/* > > *http://www.outsideinthemovie.com/* > > ** > > /A film is – or should be – more like music than like fiction. It > should be a progression of moods and feelings. The theme, what’s > behind the emotion, the meaning, all that comes later./ > > –*Stanley Kubrick* > --------------020200050600020507020301 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit To be fair - digital SD had a bumpy ride for a few years integrating with previous analog 'standards' - many of which were only approximate due to generous windows of values. Camera manufacturers had different interpretations in deciding exactly what was the correct aspect ratio. The great thing about HD is that we all started with a clean slate (on aspect ratio and frame size).
The frame rate issue is very unfortunate. What started as an engineering fudge way back at the start of NTSC (changing 30 to 29.97fps) is now apparently preserving itself in history for no obvious reason other than simulcasting HD/SD. Do you guys in the US still have NTSC broadcasting?
Perry Mitchell

On 23/06/2012 17:41, Stephen van Vuuren wrote:

This just came up last night on our local film/video list (Raleigh, NC area).

 

Someone was needing to make as “a perfect quality SD 20:9” H.264 file and could not figure out the pixel dimensions as they are “not good at math”. Advice was tossed out about letterboxing SD with no reference to SD using two difference non-square pixels nor the fact the native “20:9” footage would not be considered “SD” as it meets no standard.  Nor the fact that 2000 x 900 pixels is 20:9 etc. etc.

 

It’s all good to sleep through class and FB or skip the chapters if self-taught, but considering how often frame rates, sizes, interlacing etc. comes up – it seems like a career problem if you can’t solve these issues on your own.

 

stephen van vuuren

336.202.4777

 

http://www.sv2dcp.com/

http://www.sv2studios.com/

http://www.outsideinthemovie.com/

 

A film is – or should be – more like music than like fiction. It should be a progression of moods and feelings. The theme, what’s behind the emotion, the meaning, all that comes later.

–Stanley Kubrick

 


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