720x576 to Fit Screen

Anything and everything to do with DCP-o-matic.
hein
Posts: 15
Joined: Tue Sep 10, 2019 9:34 am
Location: Portugal

720x576 to Fit Screen

Post by hein » Thu Oct 17, 2019 11:51 am

Hello,

I'm trying to crerate a DCP from a DVD copy of a film (720x576), but i'm not able to fit the screen neither in height or in width.
It's a 1:33 film.
It just create a black frame all around the image.

Is this inevitable?

Thanks for your help
hein?!

carl
Site Admin
Posts: 1087
Joined: Thu Nov 14, 2013 2:53 pm

Re: 720x576 to Fit Screen

Post by carl » Thu Oct 17, 2019 11:57 am

Can you try "scale to" 1.33:1 and then use the flat container? That should work. You'll get black to the left and right but that's just where your image isn't :)

hein
Posts: 15
Joined: Tue Sep 10, 2019 9:34 am
Location: Portugal

Re: 720x576 to Fit Screen

Post by hein » Thu Oct 17, 2019 12:03 pm

Yes, i tried that already.
I supposed the World just doesn't want to adapt to my Will :D

thank you very much
hein?!

carl
Site Admin
Posts: 1087
Joined: Thu Nov 14, 2013 2:53 pm

Re: 720x576 to Fit Screen

Post by carl » Thu Oct 17, 2019 12:04 pm

What does DCP-o-matic say at the bottom of the video tab? Can we see a screen shot? Also, click the "outline content" checkbox and let's see how that looks.

hein
Posts: 15
Joined: Tue Sep 10, 2019 9:34 am
Location: Portugal

Re: 720x576 to Fit Screen

Post by hein » Thu Oct 17, 2019 12:23 pm

How can I attach images here? can you explain, sorry for this newbie thing... :(
hein?!

carl
Site Admin
Posts: 1087
Joined: Thu Nov 14, 2013 2:53 pm

Re: 720x576 to Fit Screen

Post by carl » Thu Oct 17, 2019 12:28 pm

I think you can drag and drop into your message, or use the "attachments" tab underneath the message editor.

Carsten
Posts: 1477
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: 720x576 to Fit Screen

Post by Carsten » Thu Oct 17, 2019 12:45 pm

4:3 movies on DVDs can be 'real' 4:3, or pillarboxed in 16:9. Without seeing a screenshot (with 'outline content' activated), we can't tell what it is.

- Carsten

hein
Posts: 15
Joined: Tue Sep 10, 2019 9:34 am
Location: Portugal

Re: 720x576 to Fit Screen

Post by hein » Thu Oct 17, 2019 1:41 pm

screenshots
Attachments
ScreenShots_dcpomatic.pdf
(87.84 KiB) Downloaded 38 times
hein?!

carl
Site Admin
Posts: 1087
Joined: Thu Nov 14, 2013 2:53 pm

Re: 720x576 to Fit Screen

Post by carl » Thu Oct 17, 2019 2:14 pm

The stuff inside the red box is in your content, so you have some black pixels in your original images. Adjust the crop settings so that the red rectangle surrounds the actual image area. Then you should be all sorted. It looks like it might not be quite 4:3 though. Maybe it's 1.66:1 within 4:3, or something?

Carsten
Posts: 1477
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: 720x576 to Fit Screen

Post by Carsten » Thu Oct 17, 2019 5:14 pm

Hmm, that screen seems to have scaling and padding already applied. I usually prefer to have a look at the raw image. But as far as DCP-o-matic recognized the DVD format/container as 1.33 with 1.07 display aspect ratio, it should be okay to analyze.

Whatever, looks as if this is a 1.66 format within a native 4:3 DVD 'container' (hence the black bars on top). The lean black bars on the sides were typical for telecines at the time, safe frame for CRT TVs or so. The effective aspect ratio is 1.60:1 (open in image editor and measure active pixels, then divide, e.g. 746/463)

You should crop away as much as possible from top and bottom symmetrically until the image fills the screen vertically, and leave black bars at the sides as they come out. Choose 'No Stretch', as that deals best with 'strange' aspect ratios not covered by the remaining options. 1.66 would stretch the image slightly horizontally. Not much, but we can do better.

My crop numbers may not exactly match your situation, as the display aspect ratio of the still I worked on is square (770/576)- while the DVD image internally is 1.07:1 (thus 720/576 covering the same content).
BUT - when set correctly, the aspect ratio in parentheses behind ''Cropped to' and 'Scaled to' should be close to 1.60 if you try to recreate.

Scaling non-square pixel and letter/pillarboxed content is probably the most difficult to understand.

I see there is a small bug in DCP-o-matic when creating the DCNC name - it uses the source native aspect ratio (1.33:1) for the container signaling, so, it creates 'F-133' - it should take the aspect ratio after cropping - you need to set the DCNC/ISDCF name manually to F-160 or F-166 to indicate the proper aspect ratio to the projectionist.

- Carsten
Attachments
Bildschirmfoto 2019-10-17 um 19.23.25.png
Bildschirmfoto 2019-10-17 um 19.23.25.png (423.94 KiB) Viewed 1278 times
ScreenShot_dcpomatic_cropped.png
ScreenShot_dcpomatic_cropped.png (315.3 KiB) Viewed 1279 times

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