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Close Captioning on Matrox AXIO and PP2
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4 Replies
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hmmm….
I think this means that Matrox/Adobe software encoding strips the CC in the VITC…
did you do any cropping?
Alex Udell
Editing, Motion Graphics, and Visual FX
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The NTSC DVD spec calls for 480 vertical lines, which eliminates the CC vertical interval signal in the encoding process. DVDs use open captioning, which can be created in your authoring software, and is turned on with your DVD remote.
Digisuite and Axio pass 486 lines (the NTSC D1 spec) including the vertical interval CC signal.
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You’re right! I never thought about the 486 to 480 conversion. Do you know what gets chopped off (or does it get squeezed?) If it gets chopped off, can I move the video layer down so it ends up back in the line 21 position after choppage has been performed? How does the encoding on my stand alone DVD recorder compensate since it seems to record and play back the CC with no problem? BTW, the CC is already encoded on the original video file so I don’t have a text file containing the text and positioning to use in the authoring program. Again, all input is greatly appreciated! Best Regards, Mike
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Mike-
Some stand alone recorders (only a few models) will encode the closed captioning if it is on the input stream, some hardware encoders will as well.
slainte,
marisu
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