Resolve - DVCPRO 50 and field order

Get answers to your questions about color grading, editing and finishing with DaVinci Resolve.
  • Author
  • Message
Offline

Johny_Sko

  • Posts: 5
  • Joined: Mon Aug 27, 2012 10:04 am

Resolve - DVCPRO 50 and field order

PostMon Aug 27, 2012 11:56 am

Hi,
a week ago I started testing Davinci Resolve Lite. I'm working on completing the project that was shot in DVCPRO 50 (PAL - Anamorphic 16:9). I discovered two problems.
1) The source material has black borders around the image on the left and right sides (http://dl.dropbox.com/u/2160706/original.png). When I import video in source format occurs in Resolve to stretch image on the entire frame (http://dl.dropbox.com/u/2160706/resolve_out1.png). This problem does not occur when I do a conversion into ProRES422 HQ before importing.
2) Source material (DVCPRO) has dominant even fields. However, the output from Resolve has always dominant odd fields. Unfortunately I did not find them there are no setup of project or exports, that can affect the output field order.
I would like to ask if anyone has experience with this problem.
I tested on: iMac 27 "i5 3.1GHz, OS X 10.8 Resolve Lite 8 and 9 Beta.
Thank you for your answer.
JS
Offline
User avatar

Joshua Helling

Blackmagic Design

  • Posts: 842
  • Joined: Wed Aug 22, 2012 4:58 pm

Re: Resolve - DVCPRO 50 and field order

PostTue Aug 28, 2012 8:08 pm

Johny_Sko wrote:Hi,
a week ago I started testing Davinci Resolve Lite. I'm working on completing the project that was shot in DVCPRO 50 (PAL - Anamorphic 16:9).


I just want to clarify. It doesn't appear that these images are anamorphic as they would have a resolution of 720x576. So are these simply screen grabs? Because they are close to square pixel equivalent 1048x576 (should be 1024x576).

Johny_Sko wrote:1) The source material has black borders around the image on the left and right sides (http://dl.dropbox.com/u/2160706/original.png). When I import video in source format occurs in Resolve to stretch image on the entire frame (http://dl.dropbox.com/u/2160706/resolve_out1.png).



Also what are you using to view these images, I know the resolve image you are using resolve. But the original, what app is drawing that image? I'm curious because looking at the skyline there seems to be more sky on the resolve. And it appears that the image is zoomed to close the black on the side which you can do with your mouse scroll wheel if you're not careful. Sides have no blanking that the original has but there is also less bike at the bottom suggesting that both axis were scaled. I ask because QT player will sometimes try to crop as much black as possible.

As a side note, if you are playing an interlaced file in QTPlayer, when you pause you will see interlacing. The key is to check when it's moving. And if the image still jutters or looks flickery when playing, then that would be indicative of a field order issue. If so, then we move onto the next part.

Johny_Sko wrote:This problem does not occur when I do a conversion into ProRES422 HQ before importing.


What format did you encode to? You didn't change the resolution or or frame rate?

Johny_Sko wrote:2) Source material (DVCPRO) has dominant even fields. However, the output from Resolve has always dominant odd fields. Unfortunately I did not find them there are no setup of project or exports, that can affect the output field order.


Well, DVCPro25 has dominant lower/even fields. But from my understanding this is not the case with DVCPro50, which should have dominant upper/odd fields.

So I guess there's just a little confusion on what your source material is. You mentioned DVCPro50 in the top of the post, but then mention DVCPro and mention the field orders appropriate for 25.

Can you clarify that and the other questions i've asked?
Joshua Helling

Director of World Wide Support
Blackmagic Design Inc.
Offline

Johny_Sko

  • Posts: 5
  • Joined: Mon Aug 27, 2012 10:04 am

Re: Resolve - DVCPRO 50 and field order

PostWed Aug 29, 2012 12:08 am

Hello, I apologize for the inaccuracy of information. Sent images were captured from the screen in VLC app. Now attach images exported directly from Resolve. On the pictures was used only function "Auto Color":
- original DVCPRO50: http://dl.dropbox.com/u/2160706/dvcpro.jpg
- PRORes: http://dl.dropbox.com/u/2160706/proress.jpg

Also I attach short section of source clip (1 sec) in DVCPRO50 PAL:
http://dl.dropbox.com/u/2160706/resolve_test.mov

Exported files from Resolve, with PAL preset, has only odd fields. All input materials is in DVCPRO 50 PAL Anamorphic + odd fields. When I converted this source material to PRO Res 422 HQ codec, distortion of the image will not appear (see attached pictures).

I chose this workflow:
1) DVCPRO 50 PAL, even fields -> PRO Res PAL, odd fields
2) Resolve color correction -> Export to FCP
3) send it to Compresor -> MPEG2 to DVD Studio PRO
 
Unfortunately, without converting to the PRORes is now for me Resolve unusable to direct work with DVCPRO 50.

JS
Offline
User avatar

Joshua Helling

Blackmagic Design

  • Posts: 842
  • Joined: Wed Aug 22, 2012 4:58 pm

Re: Resolve - DVCPRO 50 and field order

PostWed Aug 29, 2012 12:15 am

So resolve is using even fields for DVCPro preset. I wonder if it thinks its DVCPro25. Let me ask around a bit. I'll take a look at these images tomorrow.
Joshua Helling

Director of World Wide Support
Blackmagic Design Inc.

Return to DaVinci Resolve

Who is online

Users browsing this forum: Google [Bot], Jeremy Garrood, Josef Pöllmann, Niels Vestergaard, Yogendra Singh and 28 guests