Blurays with multiple objects per subtitle?

[Columbo]

Does anyone know of any blurays that contain subtitles that have multiple objects? If it helps, here are the use cases for multiple objects per subtitle:

1. Multi-line or Multi-part Subtitles
Each line or segment of text can be a separate object.
Enables independent positioning, animation, or styling (e.g., different fonts or colors).

2. Complex Layouts
Scenes with multiple on-screen speakers or elements.
Each speaker’s subtitle can be a separate object for precise placement relative to the video content.

3. Interactive or Dynamic Elements
Objects may represent icons, emojis, or small graphics alongside text.
Allows selective showing/hiding without re-rendering the entire subtitle frame.

4. Layered Composition
Background image, text layer, and shadow/outline can each be a separate object.
Supports advanced effects like transparency, drop shadows, or overlapping objects.

5. Efficient Updates
Only the object that changes (e.g., a single line in a multi-line subtitle) needs to be updated.
Reduces bandwidth if PGS frames are streamed incrementally.

6. Language or Version Variants
Different objects can correspond to alternative translations or commentary streams, selectable at playback.

Also needed are samples with multiple ODS segments per subtitle. I need samples to test my application. Thank you.

[bredboi]

I've got a number of discs which contain more than one text element onscreen simultaneously, but I'm not sure how exactly they're formatted. when i've ripped them and converted the subtitles, SubtitleEdit/SubExtractor both present them as a single image (eg: https://ibb.co/d4YPTRvp); any idea how one could identify if multiple objects are being used?

[Emulgator]

Maybe ping cubicibo.

[Columbo]

I've got a number of discs which contain more than one text element onscreen simultaneously, but I'm not sure how exactly they're formatted. when i've ripped them and converted the subtitles, SubtitleEdit/SubExtractor both present them as a single image (eg: https://ibb.co/d4YPTRvp); any idea how one could identify if multiple objects are being used? Thank you. I will try to whip up a quick utility today that will scan a sup and report multiple objects or multiple ODS per event.

Maybe ping cubicibo. Great idea, thank you.

[cubicibo]

Extensive example (https://0x0.st/P-8R.sup). The display set at PTS=14076562 (90 kHz) conveys object_id 0 in 6 segments, notably.

[Columbo]

Thank you Sir! Can you please tell me where that came from? It definitely has multiple objects. Still checking multiple ODS. My utility exits on the multiple objects before it gets to the multiple ODS test (segmented object). We could break in the debugger and check it. But from what you said it has multiple ODS too.

Multiple ODS is easy. Gotta figure out the object handling.

[cubicibo]

This tool (https://forum.doom9.org/showthread.php?t=184075). I did not keep any sample from a commercial disc that had an object defined piece-wise, but the implementation is correct. I think you can find such samples occasionally in Discotek discs, or features with a PiP storyboard like Watership Down (USA 2015, Criterion) or Serial Experiments Lain (JPN 2011, NBC Universal).

[Columbo]

Ah, I have Lain SE on hand. Thank you for the link to SUPer.

EDIT: Oops, I have only the DVDs, which don't have PGS.

[Columbo]

or features with a PiP storyboard like Watership Down (USA 2015, Criterion) I bought this but it does not have multiple objects. The storyboard is implemented in a separate SUP file. Any other reliable suggestions or sample files would be appreciated.