Hi--
I am making a private channel in which movies are captioned via a sideloaded SMPTE-TT file like
this. I have found by experiments with my Roku channel that I can vary the captions' text color by changing a parameter (tts:color="red", or whatever) in the two places it occurs in the file's preamble.
I would like to make the captions' background color transparent. I have tried adding tts:backgroundColor="transparent" [ and also tts:backgroundColor="off" and tts:backgroundColor="rgba(0,0,0,0)"] in two places in the preamble. I have also tried adding these text strings as a style override to a span inside one caption line. None has worked: the captions' background color remains black with an opacity of [it looks like maybe about] 80%.
In Roku's Home > Settings > Captions, I have Mode = On and all other parameters set to default. If I set Background Opacity to Off, then I get what I want. My problem is that I would like to control that feature from the sideloaded captions file, if the viewer will permit.
Below I have put the preamble for the file in case it will prompt a suggestion.
Any ideas?
--Gil
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<tt xml:lang="en">
<head>
<styling>
<style xml:id="basic"
tts:color="yellow"
tts:backgroundColor="transparent"
tts:fontFamily="Arial"
tts:fontSize="0.9c"
/>
</styling>
<layout>
<region xml:id="centerleft"
tts:textAlign="left"
tts:displayAlign="after"
tts:origin="50%"
tts:padding="0 0 1c 0"
/>
</layout>
</head>
<body>
<div>
<p style="basic"
begin="00:00:00.00"
end="00:00:00.50"
>
I Know What I Saw
</p>
[...snip...(about 5000 lines)...]
<p style="basic"
begin="01:31:53.72"
end="02:33:12.32"
>
</p>
</div>
</body>
</tt>
--Gil
