Re: [Q] Spruce STL format document?
Re: [Q] Spruce STL format document?
- Subject: Re: [Q] Spruce STL format document?
- From: Lucas <email@hidden>
- Date: Tue, 18 May 2010 20:01:28 -0400
I think you're confusing closed captioning with subtitling. STL is a
subtitle format, there is no mapping to closed captioning.
Spruce file format looks like the following:
st_format 2
Subtitle data_name
#Display_Start …. forced/non_forced
Display_Start non_forced
Pixel_Area (2 479)
Display_Area (0 2 719 479)
#color index value …. (E2 E1 Pa Bg) (1-16)
Color (1 2 3 4)
#contrast …. (E2 E1 Pa Bg) (0-15)
Contrast (15 15 15 0)
# Conversion rule …. (R G B R-operator G-operator B-operator)
#RGB (0-255)
#RGB-operator (=, &, <, >, X)
# = equal
# & and
# < less than
# > greater than
# X don't care
E2 (255 0 0 = = =)
E1 (0 255 0 = = =)
PA (0 0 0 = = =)
BG (255 255 255 = = =)
#image file directory.
Directory C:\test
####################################################
SP_NUMBER START END FILE_NAME
1 01:00:00:00 01:00:02:00 001.TIF
2 01:00:05:00 - 002.TIF
3 01:00:10:00 01:00:12:00 003.TIF
Each file is a 4 bit TIFF file, uncompressed. It is a rendered image of
the subtitle itself. The RGB map, which is fixed palette, states which
color to map to each TIFF palette index.
You may perhaps be confusing STL with a different file format?
608 is pretty straight forward with command byte pairs to indicate CC
channel and what type of display you would like (roll-up, pop-on,
paint-on, etc).
As for 708, you're dealing with new terror-tory! You're looking at, in
the most generic implementation, generating CDP packets with mandated
608 codes as well as native 708 codes.
Your best be there is to order a SMPTE CD which has all of the latest specs.
If you're looking at subtitling, then that a whole different ball of wax.
On 18/05/2010 12:29 PM, JongAm Park wrote:
Hello,
May I ask if any documentation on Spruce STL is available?
I would like to know this :
-----------
Specifically, there is some question how STL declares (or can
declare?) which CC1/2/3/4, 708-1/2/…/7, or WSS Page 1/…/9FF. There’s a
million possibilities, and I had hoped someone wrote a few of them
down ;)
-------------
However, it would be very nice if there is a full document or any
document.
Thank you.
--
子曰 不而不改 是謂過矣니라
공자께서 말씀하시길, 잘못을 하고도 고치지 않는 것, 그것을 잘못이라 한다.
- 論語< 衛 靈 公>편
JongAm Park
email@hidden
Visit my personal blog at http://jongampark.blogspot.com
Visit my technical blog at http://jongampark.wordpress.com
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