close caption

[reshard]

hi,
Im reshard,
i want to ask what is the best line number and best dataCaptureStart number to caption from “satellite receiver” given that i read the article on the main site and i tried line 14 and line 13 and those does not work.
i want also to asked if i could get video ,rater than those exit on the main site,that show how the captioning line look like when we change the potentiometer until we got the right line to assure that im on the right side.

hope to get quick response since i need that information alot in my project.

[Michael]

You just need to keep trying different values for the line and the dataCaptureStart values.

I think you are asking for a video instead of pictures, but I don’t have one now. Capturing the closed caption info is a very tricky project, so you need to keep trying hard.

[reshard]

ok, but do u know what number that will be better to start from, or do you know a person how tried to capture from receiver and succed in that ??

[Michael]

Sorry, I don’t have any guidance for a satellite receiver. I just don’t have one. I don’t even know if the closed caption data is coming over that kind of a video feed using the standards that I used.

Just try different lines. Try everything from 1 to 30 if you have to. Once you find the line that the data is on, then you can adjust dataCaptureStart value to line up the bits with the capturing. Please refer to the TVout source code I provided to understand how it works.

[reshard]

aha,
thanks Michael,
however what is the devise that u already use to get close caption from it ???
is it DVD??

[Michael]

I successfully decoded closed captions from a VCR, DVD player, and a Tivo DVR with a cable feed.

[reshard]

fine,
it is depend on DVD player type?,
i mean do the line and the dataCaptureStart differ with different type of DVD player?

[Michael]

I was able to find the closed captioning on all devices by trying different values. According to the closed captioning specification, it should be on line 21. But I found it on lines like 13 or 14. Just try different values and you can see the data if you display it on a lower line. The project code explains this. You can just experiment.

[Author]

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