Rich,
Followed your 'recipe' (actually mine was simpler) and the export
from the timeline to DNxHD 145 was 250% real time. Even my trick
of exporting a QT reference (from DNxHD material of course) and
using MPEG Streamclip to compress/make a self contained QT was
about 170% real time. So I guess the trash can Macs will speed us
up -- good to know! Thanks for the benchmarks.
Tim Selander
Tokyo, Japan
On 2017.02.17, 8:32, RRF Avid rrfavid@hotsprocketfilms.com
[Avid-L2] wrote:
>
>
> So I decided to run a couple of quick tests. Here are some of
> the result I am getting:
>
> Hardware: MP trash can, 8 core GPU, 32GB RAM, AMD D700 GPUs,
> Gtech 8 TB Thunderbolt drive read/write.
>
> Software: OS X El Cap 10.11.4, MC 8.5.2
>
> Sequence: 1080p 29.97, containing mostly 4K FS-7 (XAVC-I)
> talking heads shot over green screen, reframed, color graded &
> keyed over 1080p moGFX BGs with some text builds imported from
> 1080 P'shop layered files (up to 8 layers**). I removed all
> renders before the tests.
>
> Sequence duration 5:50.
>
> Export A: QT DNxHD 145 (no mixdown), export time 7:15, so about
> 20% longer then real time.
> (Exporting at DNx220 took 7:30, only 15 seconds longer)
>
> Export B: Mixdown seq. video to DNxHD 145, time 3.45
> Export QT SAS, time 2:35
> Total time 6:20.
>
> Add in the time to dupe the sequence, cut in the mixdown and
> delete the original video tracks, and Exports A & B take about
> the same amount of time.
>
> I have used Export A on lots of complex timelines with no issues.
>
> Incidentally, watching Activity Monitor, the Avid doesn't appear
> to use more then about a third of the CPU power when exporting,
> and about 2/3 of the CPU when doing a mixdown (don't know how
> much is being handed off to GPUs in either case).
>
> When I use Premiere or Adobe Media Encoder, the Activity Monitor
> shows all 16 (virtual) cores nearly pinned. Score one for Adobe.
>
> Hope this helps.
>
> - Rich
>
> **In Avid, with a foreground track of 4K XAVC-I with reframing,
> color grade and GS keying over moGFX and with 5-6 layers of
> Photoshop titles on top, and a couple of audio tracks using track
> processing, my rig will play at full res (green video quality)
> including through an AJA T-Tap to a client monitor in real time
> with no sweat. FWIW.
>
>
>> On Feb 16, 2017, at 12:47 PM, Greg Huson Greg@SecretHQ.com
>> <mailto:Greg@secrethq.com> [Avid-L2] <Avid-L2@yahoogroups.com
>> <mailto:Avid-L2@yahoogroups.com>> wrote:
>>
>>
>> We're still using cheese graters- but video mixdown has been
>> the way to go for some time now- much, much faster. Then
>> export same-as-source and that's usually faster than realtime.
>> Be sure to set your contrast correctly in the export settings.
>>
>> Exporting un-mixed-down video uses the QuickTime engine which
>> is ancient now.
>>
>> ________________________
>> Greg Huson
>> Secret Headquarters, Inc
>> Greg (at)SecretHQ.com <http://secrethq.com/>
>> www.SecretHQ.com <http://www.secrethq.com/>
>> DigitalServiceStation.com <http://digitalservicestation.com/>
>>
>> On Feb 16, 2017, at 12:22, Lou Wirthloutv@mindspring.com
>> <mailto:loutv@mindspring.com>[Avid-L2] <Avid-L2@yahoogroups.com
>> <mailto:Avid-L2@yahoogroups.com>> wrote:
>>
>>> So I have moved on from the MacPro 2009 and decided to go with
>>> 4 year old technology rather than 9 and got a late 2013 model
>>> Vader mac. Sonnet box works great for Avid card, all drives
>>> and hubs working fine. Running MC 8.6.5 and all very
>>> responsive and renders are quick.
>>> But….
>>> Exports are taking forever if they go at all. I have a 9
>>> minute sequence DNX 220. Normally in the old days (about five
>>> weeks ago) It would export to any drive and take a few minutes
>>> at most. Now that same sequence runs 20 minutes and still is
>>> only 70% done. Often I get a failed error.
>>>
>>> Anyone run into this on the newer macs or when using SATA and
>>> thunderbolt drives?
>>>
>>> Resorting to mixdown and will try that to see if I have any
>>> luck. QT reference won't work because I used AMA media which
>>> was all transcoded but doesn't seem to matter to Avid.
>>>
>>> thanks
>>>
>>> Lou
>>> Lou Wirth Productions
>>> 500Tamal Plaza, Suite 522
>>> Corte Madera, CA 94925
>>> www.louwirth.com <http://www.louwirth.com/>
>>> 415-924-9411p
>>>
>>
>
>
>
>
Posted by: Tim Selander <selander@tkf.att.ne.jp>
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