Sunday, June 25, 2017

Re: [Avid-L2] AMA file Export

 

Yeah, this was my way of doing stuff as well, I'm a long time HUGE fan of QT ref!

Sadly, FFmpeg does not support it. (Any transcoding app. that relies on QuickTime 'should' be able to work with it.)

Not sure of the implementation nowadays. Does Avid force render any unrendered stuff on export to QT ref?
(I'm not at my workstation now…)

Oh, and I just realised I already have made a FFmpeg front end that could be used for AMA file export.

However, this is intended for transcription, meaning low GOP size (so you can search more easily), and mono output.
(But it does BITC if you like.)


Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
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On 25 Jun 2017, at 03:55, bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

I keep careful track of my renders so they are all to the same codec, usually DNX 175X or DNX 220X and I render an upper track safe color limit and fill all filler areas with media of the same codec.  This allows a QT Ref export that I take into Adobe Media Encoder and let it do the H_264 while I continue in Avid.  This requires some careful attention to the render settings so they aren't set to same as source and it probably works for me because I'm doing the online so I don't have other hands on the sequence and project.  



---In Avid-L2@yahoogroups.com, <bouke@...> wrote :

Well, seems easy enough.
If you AMA export to DNX in MXF OP1a, you have the option to do a mixdown to stereo. 
Then you have a nice in-between for encoding to H264.
FFmpeg can do that for you, and add the BITC if needed (And a logo if you want), and it can start while the Avid export is still running.

Only gotcha is that FFmpeg has to be slower than your export, or it will find quit the  encode while it has catched up with Avid's export.
So a few options:
Set FFmpeg to be dog slow (That will result in gorgeous but very low bitrate files.)
Or, learn how fast your export normally is, learn how fast FFmpeg is with your recipe, and do the math on how long you have to postpone the transcode.

(AME with a watch folder is also an option…)

So, once you've set it up, it's a simple few mouse clicks export and you can walk away, or start using your avid 


Bouke

Edit 'B / VideoToolShed.com
van Oldenbarneveltstraat 33
6512 AS  Nijmegen
+31 6 21817248

On 23 Jun 2017, at 11:17, 'Nigel Gourley' avid-l@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:


Yes we have done that but quite a few steps and slow .. 2 encodes 

 

We were just trying to streamline and have the minimum steps 

 

N

 
 
 
 

 

From: Avid-L2@yahoogroups.com [mailto:Avid-L2@yahoogroups.com] 
Sent: 23 June 2017 08:36
To: Avid-L2@yahoogroups.com
Subject: [Avid-L2] Re: AMA file Export

 
  

I'd do a video mixdown cut into seq then do a SAS export.
Still dnx36 size but I'd have a watch folder setup on a server to grab those sources and make H264 outputs off the Avid.

Pat Horridge






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