![]() Errors in either one could result in your captions not being seen. I've always wondered how to be sure whether Vegas or any media player is displaying the CEA 708 or CEA 608 information. ![]() Many ( at least they were in early 2011) use the legacy CEA-608 line 21 information and transcode it to a digital format that is broadcast along with the DTV signal. I think one of the problems is that the embedded CEA-708 captioning (which was developed to be used for file embedded digital TV captions) is still not used by a lot of broadcasters. ![]() Even if Vegas can see its own captions in the preview monitor, I would want a bit more proof of success before I submitted to a broadcaster. If you have the ability to play out through a BM or AJA card that can feed a true HD component signal to a monitor, I would feel even better with that test. Without mimicking all the steps a broadcaster would use, it's hard to be certain if it's going to be received successfully at home. Not having worked with HD Closed Captions, it would seem if you can stream the format from a USB drive or other portable drive into an HDTV, you would at least know if the CC info was correctly embedded in your file. The only way I felt certain my SD Closed Captioning was successful was to play out the uncompressed QT through the component outs of my AJA Kona card into a production monitor that supported CC. ![]()
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