From: "Brendan Bolles" Received: from spike.lmi.net ([66.117.140.17] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP id 5564696 for AE-List@media-motion.tv; Thu, 04 Sep 2014 19:16:00 +0200 Received: from [192.168.1.13] (c-73-167-88-176.hsd1.ma.comcast.net [73.167.88.176]) by spike.lmi.net (Postfix) with ESMTP id 211581541A4 for ; Thu, 4 Sep 2014 10:16:00 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1085) Subject: Re: [AE] Compression issues article In-Reply-To: Date: Thu, 4 Sep 2014 13:16:00 -0400 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: "After Effects Mail List" X-Mailer: Apple Mail (2.1085) On Sep 4, 2014, at 11:22 AM, Robert Kjettrup wrote: > A bit of a warning about using FFmpeg if you dont want colorshifs.=20 > I have found if i use any intermediate codec in YUV colorspace that = the colors will shift slightly when read by FFmpeg. Doing an RGB encoded = intermediate file i dont see any noticeable colorshift. But that = normally means uncompressed, and very large files, for FFmpeg to be able = to read it. Interesting. One issue I would anticipate is that H.264 is typically = 4:2:0, so if you save in another YUV format, FFmpeg would have to = convert it, possibly by converting back to RGB. I would hope there was = some 4:2:0 YUV format that wouldn't involve those issues, but I don't = know. Brendan