How can i create closed captions for broadcast with Final Cut Pro?
That depends. If your broadcaster accepts closed caption data written into an EIA 708 stream by Apple Compressor an affordable easy to use solution is found. But EIA 708 is is still new and confusion needs time to settle. Update: Clients often demand closed captions printed tto tape. In this case you can use Final Cut 7 to add the closed captions from SCC file or QuickTime movie with closed captions and play out to SD and HD broadcast tape. Standard NTSC EIA 608 line 21 closed captions can be created in older FCP with image overlays. There are 3rd party software tools that offer CC image rendering, for play-out you will have to tune your hardware/software setup. Otherwise the CC data may not survive. Another option is to feed closed captions live into the video stream. This requires specialized hardware. New systems are being developed that support either standard.
