Saturday, March 26, 2016

Re: [Avid-L2] Same as Source QT export creates .mov with wrong data rate in QT and Media Info?

 

friggin auto correct. try 'mix down' just on the very first clip.
----------------------------------------------------
Greg Huson
Chief
Secret Headquarters, Inc
Production / Post Production
Culver City, CA
323 677 2092
www.SecretHQ.com
www.DigitalServiceStation.com

> On Mar 26, 2016, at 7:51 PM, Greg Huson Greg@SecretHQ.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
>
> If you're not going to do video mix down, try next town just on the first clip. Then export short section that includes the next few clips and see if it is correctly identified.
>
> Don't remember back to 6.5, but even then I think a video makes down then export same as source is going to be faster anyway, so I feel like you're just looking for trouble! ;-)
>
> ________________________
> Greg Huson
> Secret Headquarters, Inc
> Greg (at) SecretHQ.com
> www.SecretHQ.com
> DigitalServiceStation.com
>
> On Mar 26, 2016, at 18:56, John Moore bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
>>
>>
>> In today's episode of Mystery Render Theater 300 I am trying to exports same as source to QT in a 1080 23.976 project. All media is DNX-175X as are all renders. I'm adding a time code burn in. When I export the sequence same as source I end up with a QT .mov that lists as Avid 1:1x and a data rate of 796.67 mbits/sec in QT 7. Using Media Info to access the file it too shows a bit rate of 797Mbps and lists the Codec ID as qt 2005.03(qt ).
>>
>> All the sources are DNX-175X. If I export the actual clips from the bin the show correctly as DNX-175X. If I remove the color effect off the clip in the timeline the exported file is also correctly listed as DNX-175X. If I leave the symphony color correction on and add a safe color limit and render it the exported file is DNX-175X. If I don't render the safe color then the exported file shows up as the 1:1X with the 797Mbps data rate.
>>
>> The clips are from Arri Alexa and Amira and were baked in Resolve to DNX-175X.
>>
>> It seems it's some sort of meta data inaccuracy because when I export the Hour and 20 minute time line the resulting file is around 100Gigs so the video essence must be DNX-175X and not 1:1 x. I always add a safe color render first to my sequences before exporting so I have never seen this behavior before. Also I almost never export to QT same as source but usually use a QT Ref. In this case because it is a high res output with Time Code Burn In for ProTools watchdown I skipped my usual Safe Color Limit and found this issue.
>>
>> I don't understand if an uncolor corrected clip knows to export same as source as DNX-175X why would adding a symphony color correction confuse the meta data into thinking the same as source export is 1:1 x? Just a quirky thing.
>>
>> I'm on MacPro 10.8.5 12 Core running Avid SNDX 6.5.4.7.
>>
>> John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
>>
>
>

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Posted by: Greg Huson <greg@secrethq.com>
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Posted by Video Geek Squad at 8:01 PM 0 comments

Re: [Avid-L2] Same as Source QT export creates .mov with wrong data rate in QT and Media Info?

 

If you're not going to do video mix down, try next town just on the first clip.  Then export short section that includes the next few clips and see if it is correctly identified. 

Don't remember back to 6.5, but even then I think a video makes down then export same as source is going to be faster anyway, so I feel like you're just looking for trouble!  ;-)

________________________
Greg Huson
Secret Headquarters, Inc
Greg (at) SecretHQ.com

On Mar 26, 2016, at 18:56, John Moore bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

 

In today's episode of Mystery Render Theater 300 I am trying to exports same as source to QT in a 1080 23.976 project.  All media is DNX-175X as are all renders.  I'm adding a time code burn in.  When I export the sequence same as source I end up with a QT .mov that lists as Avid 1:1x and a data rate of 796.67 mbits/sec in QT 7.  Using Media Info to access the file it too shows a bit rate of 797Mbps and lists the Codec ID as qt 2005.03(qt ). 

All the sources are DNX-175X.  If I export the actual clips from the bin the show correctly as DNX-175X.  If I remove the color effect off the clip in the timeline the exported file is also correctly listed as DNX-175X.  If I leave the symphony color correction on and add a safe color limit and render it the exported file is DNX-175X.  If I don't render the safe color then the exported file shows up as the 1:1X with the 797Mbps data rate.

The clips are from Arri Alexa and Amira and were baked in Resolve to DNX-175X.

It seems it's some sort of meta data inaccuracy because when I export the Hour and 20 minute time line the resulting file is around 100Gigs so the video essence must be DNX-175X and not 1:1 x.  I always add a safe color render first to my sequences before exporting so I have never seen this behavior before.  Also I almost never export to QT same as source but usually use a QT Ref.  In this case because it is a high res output with Time Code Burn In for ProTools watchdown I skipped my usual Safe Color Limit and found this issue. 

I don't understand if an uncolor corrected clip knows to export same as source as DNX-175X why would adding a symphony color correction confuse the meta data into thinking the same as source export is 1:1 x?  Just a quirky thing.

I'm on MacPro 10.8.5 12 Core running Avid SNDX 6.5.4.7.
 
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

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Posted by: Greg Huson <greg@secrethq.com>
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this is the Avid-L2

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Posted by Video Geek Squad at 7:51 PM 0 comments

[Avid-L2] Same as Source QT export creates .mov with wrong data rate in QT and Media Info?

 

In today's episode of Mystery Render Theater 300 I am trying to exports same as source to QT in a 1080 23.976 project.  All media is DNX-175X as are all renders.  I'm adding a time code burn in.  When I export the sequence same as source I end up with a QT .mov that lists as Avid 1:1x and a data rate of 796.67 mbits/sec in QT 7.  Using Media Info to access the file it too shows a bit rate of 797Mbps and lists the Codec ID as qt 2005.03(qt ). 

All the sources are DNX-175X.  If I export the actual clips from the bin the show correctly as DNX-175X.  If I remove the color effect off the clip in the timeline the exported file is also correctly listed as DNX-175X.  If I leave the symphony color correction on and add a safe color limit and render it the exported file is DNX-175X.  If I don't render the safe color then the exported file shows up as the 1:1X with the 797Mbps data rate.

The clips are from Arri Alexa and Amira and were baked in Resolve to DNX-175X.

It seems it's some sort of meta data inaccuracy because when I export the Hour and 20 minute time line the resulting file is around 100Gigs so the video essence must be DNX-175X and not 1:1 x.  I always add a safe color render first to my sequences before exporting so I have never seen this behavior before.  Also I almost never export to QT same as source but usually use a QT Ref.  In this case because it is a high res output with Time Code Burn In for ProTools watchdown I skipped my usual Safe Color Limit and found this issue. 

I don't understand if an uncolor corrected clip knows to export same as source as DNX-175X why would adding a symphony color correction confuse the meta data into thinking the same as source export is 1:1 x?  Just a quirky thing.

I'm on MacPro 10.8.5 12 Core running Avid SNDX 6.5.4.7.
 
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

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Posted by: John Moore <bigfish@pacbell.net>
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Posted by Video Geek Squad at 6:56 PM 0 comments

[Avid-L2] AVID APPMAN TUTORIAL

 

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Posted by: Alan Miller <ammfx@yahoo.com>
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Posted by Video Geek Squad at 8:59 AM 0 comments

Friday, March 25, 2016

Re: [Avid-L2] avid editors' opinion of adobe premiere?

 

On Mar 19, 2016, at 3:23 PM, Michael Brockington <mbrock321@gmail.com> wrote:


I was wondering about what happened to resolution when you start nesting Adobe sequences. 

I was wrong. I have gone back to this and tested more thoroughly with test patterns. Premiere does a surprisingly good job blowing up a the nested materials, but it is not capturing the original resolution. Good, but no cigar.

However, we tested the sequence in After Effects and AE can do this. With the strong connection between the two apps, it's a perfectly reasonable path. 

The magic is in the "Rasterize Continuously" button. Send the sequence to AE. You have to send the entire sequence, so that AE has the complete composition. Just linking won't work. So it's one way. Nest the composition in AE and use transform to blow up just like you would in Premiere. But in AE you can press the "Rasterize Continuously" button on the nest layer et voila! AE "looks through" the nest back to the original layers.  

This is not quite as simple as doing it right in Premiere. Sending to AE is not without it's quirks. Not everything in Premiere translates perfectly (like titles). And I have not tested render times. I'm sure the render will take longer.

I'm dying to find out if Avid can handle this problem in the new software. I could not find a path for this in 2015.

Cheers,
               tod

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Posted by Video Geek Squad at 3:15 PM 0 comments

[Avid-L2] Re: AMA for Dublin Core metadata?

 

Thanks for the updated info.

Best,
Mike

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Posted by: Mike Rickard <mrickard72@gmail.com>
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Posted by Video Geek Squad at 3:44 AM 0 comments

[Avid-L2] Re: 10bit codecs, Banding and Filesize

 


Prores is a variable datarate rate codec where as Dnx is fixed so depending on the content its possible to see different file sizes between them.

Pat from his mobile.

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Posted by: Pat Horridge <pat@horridge.org.uk>
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Posted by Video Geek Squad at 3:03 AM 0 comments

Thursday, March 24, 2016

[Avid-L2] 10bit codecs, Banding and Filesize

 

In testing techniques to lessen the banding effect on a graduated background I've come across some unexpected results that I hope some of you can explain or comment on… 

 

I created a 16bit Composition in After Effect that adds fractal noise to a radial graduated background.  It looks very good in AE on the computer monitor at 100%. 

 

Then I exported the composition to both ProResHQ and AvidDNx175x – both 10 bit codecs.  The DNx175x file was 364MB and also looked very good when played back in Quicktime, but the ProResHQ file was only 200MB and definitely showed some banding and color contamination in what was a neutral grey background.  I was surprised that the file sizes and results were so different between the 2 codecs. 

 

I then did a fast import of the DNx175x file into Media Composer, put it on a timeline, and did a video mixdown to ProResHQ.  Viewing at 10bit on my external FSI monitor I really cannot see a difference toggling between the original imported clip and the mixdown.  But when I do a Same As Source export, the resulting ProResHQ file viewed in Quicktime has the same banding I saw in the ProResHQ file that After Effects created.  And, this new file is now only 84MB in size!  Checking the Avid MediaFiles the mixdown mxf file is also 84MB.

 

We normally mixdown to ProResHQ and export Same As Source because it has always given consistent, high quality results for encoding to H264 and other deliverables.  In this case, the ProResHQ file is being played back directly from a laptop to a big screen movie house system.  Everything looks great except for the banding issue I was trying to solve. Now I'm surprised to see what a quality difference there is between the two 10-bit codecs.  Why does the Same As Source file have banding I can't detect in the mixdown with my grading monitor?  And why does Avid's mixdown create such as small file compared to the ProResHQ that After Effects created (even though they have similar banding)?


Thanks for your comments!

Craig Mikhitarian

ACM Productions, Ltd.


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Posted by Video Geek Squad at 12:48 PM 0 comments

[Avid-L2] Re: AMA for Dublin Core metadata?

 

Sorry for the multiple posts - my brain works in wavs... ;)
I recently wrote a blog on mus.iD for Avid that will give you a bit more updated detail.

Easily Log Song Metadata with AMA Plug-in mus.iD

 

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Posted by: michael@24p.com
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Posted by Video Geek Squad at 9:42 AM 0 comments

[Avid-L2] Re: AMA for Dublin Core metadata?

 

Forgot to mention that you can download a trial version and check it out to see if it supports what you are looking for. If not, let me know. michael[at]24p[dot]com


Michael

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Posted by Video Geek Squad at 9:35 AM 0 comments
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