CC lines showing in reverse order.

Anything and everything to do with DCP-o-matic.
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kfairchild
Posts: 3
Joined: Fri Jul 28, 2017 7:01 am

CC lines showing in reverse order.

Post by kfairchild »

When viewing CC with the Dolby Captiview the caption lines appear in reverse order.

Captions were created with Subtitle Edit. Saved using the D-Cinema SMPTE 2014 format.
Caption source file attached. As well as the output xml from dcpomatic.

The dcpomatic player does show the lines in the correct order, but playback through the Dolby Captiview does not.
It appears that dcpomatic is reversing the order in the xml output.
Attachments
sub_b0b069c7-81cd-4075-a84b-bc9fcaca4ab9.xml
(8.95 KiB) Downloaded 355 times
GhostbustersCaptionSource.xml
(13.3 KiB) Downloaded 359 times
kfairchild
Posts: 3
Joined: Fri Jul 28, 2017 7:01 am

Re: CC lines showing in reverse order.

Post by kfairchild »

dcpomaticCC2.jpg
dcpomaticCC2.jpg (962.87 KiB) Viewed 6318 times
dcpomaticCC.JPG
dcpomaticCC.JPG (153.97 KiB) Viewed 6318 times
carl
Site Admin
Posts: 2338
Joined: Thu Nov 14, 2013 2:53 pm

Re: CC lines showing in reverse order.

Post by carl »

Hi,
Thanks for the report! I think I can see what needs to change in DCP-o-matic to fix this. I made a note on our tracker. I'm away for a few days but I'll take a look when I get back.
Carsten
Posts: 2648
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: CC lines showing in reverse order.

Post by Carsten »

Using Valign is mentioned in Harolds CCAP best practice document:

https://isdcf.com/papers/ISDCF-Doc9-Clo ... ctices.pdf
HaroldHallikainen
Posts: 18
Joined: Mon Apr 27, 2020 9:54 pm

Re: CC lines showing in reverse order.

Post by HaroldHallikainen »

The Valign and Vposition values for the Text elements look correct, but as pointed out in the ISDCF document, some systems require the top line of text to be the first Text element. Here it is the bottom. That complies with SMPTE ST 428-7, but does not work properly on this system.

Harold
carl
Site Admin
Posts: 2338
Joined: Thu Nov 14, 2013 2:53 pm

Re: CC lines showing in reverse order.

Post by carl »

Thanks Harold, I will fix that.
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