test47-63.xml does not render

[frans-ebu]

Note the test leaves out many things on purpose (to test initial values behaviour) and even does not refer to any style (although it does define one as that is mandatory).

[SoleneChiche]

@frans-ebu So for color and background color, what do we want (black on transparent, white on black?)?

[frans-ebu]

If not defined by the user:

• background color = TTML 1 initial value = transparent
• color = application dependent (EBU recommends good contrast) -> for this implementation I would choose white

[SoleneChiche]

So if both are not defined, white on transparent? I would rather choose a flashy yellow or green...

[nigelmegitt]

Cue long debate on what is the least used colour in broadcast video content... Actually I might know someone who knows the answer to that, I'll check.

[frans-ebu]

@SoleneBuet I am not guaranteeing it is optimum, but just feel it is the most used colour for subs, so biggest change to get it right, but I'd love to use another facts (stats) based colour recommendation, based on @nigelmegitt 's check!

My simple first guess based on prodution experience (chroma-keying) would be: (bright) green or blue (minimial interference with skin tones for blue and less used in wardrobes for green).

[frans-ebu]

Can we have the transparent and whiteimplemented for now, and then make this an 'improvement' issue (not closing it until we have the facts check done)?

[SoleneChiche]

This is the case now. Thanks

[frans-ebu]

The test renders now, so I will close this one.