Exporting from Red Cine X pro - using multiple cores.

[Will Wernick]

Can anyone tell me how to use all 8 cores when exporting from Red Cine X Pro. No red rocket yet... Also, hot so get multiple exports going at the same time? Thanks in advance! Banging my head against the wall....

[Mike P.]

Redline commands. It's tedious, but it'll use all eight threads. I still don't know exactly how to do it (haven't looked up the commands), but that's currently the only way it can be done via REDapps.

As a test, try making the corrections in RCXp (to create the RMDs) and then load it up in Premiere and transcode using Adobe Media Encoder... I think it'll be faster than RCX since AME makes better use of multi-threading.

[John Marchant]

In RCX-Pro, preferences -> transcode -> increase max simultaneous Export jobs (Redline, snapshots)

Then go to export settings preset window, go to options, and click 'use REDline (software only)

Then you'll get a bit more horsepower thrown at stuff :)

[Will Wernick]

In RCX-Pro, preferences -> transcode -> increase max simultaneous Export jobs (Redline, snapshots)

Then go to export settings preset window, go to options, and click 'use REDline (software only)

Then you'll get a bit more horsepower thrown at stuff :)

Lifesaver!!! Thank you :)

[Antonio Ribeiro]

Am about to try it too, as I stumbled across exactly the same issue. And with six TB to go, I'm in for a very long wait...

[Nick Pasquariello]

In RCX-Pro, preferences -> transcode -> increase max simultaneous Export jobs (Redline, snapshots)

Then go to export settings preset window, go to options, and click 'use REDline (software only)

Then you'll get a bit more horsepower thrown at stuff :)

I don't like to resurrect old threads, but I'd like to get this working, and this is the only thread I've found so far that addresses this. So!

When it says "Software Only", does that mean it won't use a Red Rocket card? I've got a Mac Pro 12-core, with NVidia Quadro 4800 FX and Red Rocket card. When I transcode to ProRes, it uses maybe 30% of the processor. I'd love to be able to process multiple clips at a time, or somehow utilize more CPU, so that I can pump out ProRes proxies and small H264s (for LivePlay and ToDailies) on the day of a shoot. Will using this 'use Redline' checkbox speed me up, or slow me down?

[Nick Pasquariello]

Finally got around to testing this. All testing was performed on the exact same machine; a 12-core 2.66 GHz Mac Pro with an NVidia Quadro FX 4800, 36GB of RAM, and Red Rocket installed. Media was connected to the machine via Firewire 800, with the transcodes going out to our server over 1GB Ethernet; certainly either of those could be a bottleneck, but given the processor usage I was seeing (detailed below) I don't think this is the case.

Method: I had a drive hooked up from a shoot we did last week. I took the first 8 clips from the drive, about 15 minutes of total footage, and transcoded them first with the Red Rocket, then with Multi-processing, then without the Rocket and without multi-processing. The settings that John Marchant (above) laid out certainly do enable the computer to transcode multiple clips at once; you can see in your export window that the computer is chugging through up to 6 clips at once. In my case, I tried it first with 4, and saw that still 1/3 of my processor wasn't being utilized, so I upped it to the max of 6 simultaneous transcodes, whereupon my processor stayed around 80-90% usage.

Unfortunately, it became clear very quickly that what I feared is correct: when the setting says "REDline (software only)", it does indeed mean that the Rocket will be disabled.

Results:

8 Clips Transcoded with Red Rocket: ~12 minutes.
8 Clips Transcoded without Red Rocket but with 6-simultaneous Multi Processing: ~86 minutes
8 Clips Transcoded without Red Rocket and only Single Processed: ~203 minutes

So, the results are pretty clear. There's no substitute for a Red Rocket. However, on anything without, you can probably squeeze a bit faster transcodes by using Multi Processing. I'll have to try it at home on my mid 2010 MacBook Pro; could probably do 2 transcodes at once, and shave a few minutes off per hour of transcoding.

[David Kalla]

Hello,

I have a litte problem on multi processing on a HP z400, without a REDrocket.
I want to export to Avid AAF & MXF, 1080p DNxHD 36 for offline editing. When I use the Redline (software only) option to use all cores of the cpu, I get at some clips a crash on the redexport.exe.
Sometimes the clips are exported correctly then, sometimes they are missing and sometimes I can import them in Avid, but it shows a bad preview picture in bin script view.

I have tried a other PC aswell and get the same errormessages about crashing redexport.exe

Does anyone know this issue and maybe has a solution?

Thanks!