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Vegas 11 closed captions for HD broadcast
My goal was to import an scc file, embed into 30 min infomercial, and print to DVCPro HD tape. Considering it was my first adventure into this workflow situation I thought it went very smoothly.
The captions appeared as blue markers above the video on the timeline. I slid the markers group to achieve perfect sync, selected the entire clip, and printed to DVCPro HD using BlackMagic Decklink extreme HD, HD-SDI to a Panasonic AJ-HD1200 deck. Wasn’t sure how to double check this tape for captions after recording was completed, but audio and video was there so I sent the tape in to the station for broadcast.
Guess what? No closed captions.
I CMA with a rendered .mov file of the same program and the station will use that instead of the tape. I’m sure the .mov file has closed captions because I imported it back into Vegas 11 and the captions showed up as markers within the video clip.
The station specs call for vanc 9 captions and that’s about all I had to go on.
So……….. Where did I go wrong with the DVCPro HD tape? Is this a vertical blanking issue?
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4 Replies
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Do you have the proper broadcast specs to render to? I ran into an issue similar to this recently with footage from DVCPro tapes. If I were to put closed captioning, I believe I would have had to render to one resolution in mpeg2. If no closed captioning was necessary, then mov was an option in a different resolution.
http://www.scenethroughglass.com
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Broadcast file specs….
File Formats QuickTime: mov, mpg Windows Media: avi, mpg, wmv
Video Codecs
Please use standard, non-proprietary compression when rendering video.High Definition
Please render all HD spots with the following standards.
Video Standard Standard: 1080i Aspect Ratio: 16:9 Video Resolution: 1920 x 1080 Bit Rate: 35 Mb/s Frame Rate: 29.97 fps
Close Captioning Vanc 9 -
I pretty sure the issue you ran into had to do with standard definition 486 lines opposed to 480 lines. Most DV, DVCam and possibily, DVCPro tapes don’t support 486 lines and therefor line 21 would be missing.
I’ve been there and worked my way through it.
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I’ve been posting about it all week, but I had problems because the video was 720×512 that the client gave me that another company made for them, and on top of that it had black space at the top, and all needed to be made broadcast safe.
Anyways, all I can say is to check and make sure that the format you’re rendering to specifically supports closed captions, because I’ve seen that for the same video, certain formats (and their different resolution requirements, more accurately) don’t.
http://www.scenethroughglass.com
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