With MacCaption and CaptionMaker, you can closed caption any 720x486 uncompressed video sitting in your NLE system like Avid, Media 100, Adobe Premiere Pro, etc. without using any external closed caption encoder. Then you can dump the video to a tape format (BetaSP, DigiBeta etc.) via the NLE hardware (like Avid, AJA, Blackmagic DeckLink, Matrox, etc.).
To closed caption a video, you need the transcript of the video. There are many ways to transcribe a video. After obtaining the transcript, you will then import the script to the captioning software and format the script. Finally, you will synchronize the closed captions to the video using our Auto Time Stamp feature which dramatically reduces the time it takes to accomplish this.
Our captioning software then exports a 720x486 black video with closed caption data on row 0 or 1. For example, on Avid systems the closed
caption data sits on Row 1 and column 26. The 720x486 video file is then imported into the NLE system and put on the time line along with the original video. A picture-in-picture or crop effect is then applied to the imported video to mask off all but the closed caption image line to merge the imported video with your original video.
In case you are not adding the closed captions to the video yourself, you can send this black video to the video editor at a different location to superimpose closed captions to the original video. Because these files are 99% black, they can be zipped to about 0.15%. The .zip file can then be emailed or ftp’d to the video editor. You don't have to worry about big file sizes.
When you transfer the 720x486 video to NTSC via the NLE hardware (not Firewire) the closed caption data from Row 0 or Row 1 of 720x486 video is transferred to Line 21 of NTSC video.