Unsure. I only know some specific cases, so I can't confirm it's like this, and can't confirm it exists in newer versions beyond 2018.5 which is where I am right now.
On Tue, Jan 15, 2019 at 11:18 PM Bogdan Grigorescu <bogdan_grigorescu@yahoo.com> wrote:
does it happen with intraframe codecs as well?BG
From: "Mark Spano cutandcover@gmail.com [Avid-L2]" <Avid-L2@yahoogroups.com>
To: Yahoogroups <Avid-L2@yahoogroups.com>; johnrobmoore <bigfish@pacbell.net>
Sent: Tuesday, January 15, 2019 8:05 PM
Subject: Re: [Avid-L2] Export 4K question
The slip happens only in the mixdown. It's possible it would also appear in a render, I haven't confirmed that yet. I've been doing a lot of 59.94p and 60p game captures (H.264) to 23..976p via standard motion adapter (simple dropping frames default behavior).. I find upon mixdown, the mixdown starts a frame or two before where I'd parked my in point and ends a frame or two before the out point. Solution for these clips has been to do a sequence transcode of only the linked clips with handles, then I can slip them back without loss. Burned me a few times when I'd made a mixdown and sent it off to color grading without checking, then get back graded clips that start early and are missing content at the end. Nonsensical, but this is the world…That's scary that things shift on the mixdown. When it happens is it only on the mixdown that the slippage occurs or do you see the same slippage in the original sequence? I'm thinking it would only be in the mixdown but I wonder what issue causes it.Is it something that happens in long gop media or just in general. Perhaps because I generally render a safe color upper track I haven't seen the behavior myself or didn't notice it.
---In Avid-L2@yahoogroups.com, <cutandcover@...> wrote :Hi Lou,A mixdown to the desired codec followed by an export Same As Source is your best bet. One thing to note: if you are doing any frame rate conversions in the timeline via temporal adapters, you should check the timing of these once the mixdown is done. I've seen slight slipping when these effects are baked in, where the start frame gets shifted earlier or later from where you had originally placed it. Otherwise, once the mixdown is QC'd, you can export same as source and that'll be the master.HiI am in final stages of 4K documentary. Need to export to send off to DCP company for DVDs, etc. They want QTProRes422 or better.QuestionShould I do a video mix down (working with linked AMA footage) to proRes and then export same as source?OrShould I export DNxHR HQX or 444 and then use Media Encoder to create QTProRes?Or is there no difference?Thank youLou
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Posted by: Mark Spano <cutandcover@gmail.com>
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