AVID DS 2k DPX realtime problems …

Avid Media Composer

AVID DS 2k DPX realtime problems …

Posted by Matthias Halibrand on January 28, 2012 at 2:17 pm

Hi,

I got 2k DPX-Scans in 2048×1240 for conforming, grading and finishing.
I created an HD sequence with 709-LUT and conformed the DPX-files which get placed in the timeline without any resizing, just centered and cropped, basically.
The whole timeline shows that it needs to be rendered, even though I haven’t even placed any FXs on the clips. When I read the specs of the system it should be able to play up to 2k in realtime. What am I doing wrong?

Specs: DS 10.5 – XENA2 – FibreChannelStorage 18TB – DPXs imported using printing density LUT

Thanks for your ideas,

Matthias

Matthias Halibrand replied 14 years, 3 months ago 3 Members · 4 Replies
4 Replies

Glenn Sakatch
January 30, 2012 at 5:52 pm

I think you might be working in 4:2:2 instead of 4:4:4 ?

Glenn
Matthias Halibrand
January 30, 2012 at 9:45 pm

Hi Glenn,

thanks for your reply. Sadly everything is correctly switched and configured to 4:4:4, so that’s not it.
Still desperately looking for an answer.

Thanks guys and girls,

MatzeHali
Erik Peterson
January 31, 2012 at 3:44 am

There are several conditions for your DPX files to play in realtime, see below. Your Sequence settings have to match the DPX files frame size and frame rate. One workaround is to edit at the 2k res and switch before output. Either way there is a render.

Taken from the Avid High Resolution Editing Workflow Guide:

Real-Time Playback for High-Res Media
Linked files will be real-time for DPX and R3D formats if:
• The resolution of the high-res files are supported for realtime playback on your system
configuration—see the Avid DS support website at https://www.avid.com.
•The high-res files are on your local videostorage that is large and fast enough to support high throughput.
•The format of the high-res files exactly match the format of the current sequence.
•The current sequence storage bit-depth is set to 10.
• For DPX. The data in the DPX files are correctly aligned. This should almost always be
the case. If not, the FixDPX utility can fix any misaligned data DPX files—see
“Aligning your DPX Files” on page 115.

Good Luck,
Erik
Matthias Halibrand
January 31, 2012 at 1:23 pm

Hi,

thanks for that, I also found that in a PDF by Avid, just now.
I’ll try and report back.

Thanks,

MatzeHali

– edited for stupidity –

– second edit – :

Tried to do a sequence customized to the exact frame size of the DPX-files.
Same old, same old. No realtime playback.
So, next question. If I set up the HD-timeline now and do all the resizing-stuff (but not the cc and other FX which are on there) and render this out to a new HD-sized DPX-sequence, can I import this again and get back the settings of my previous timeline, e.g. already done FX and CC?

Thanks for all your help,

MatzeHali

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