• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Lesson 16. Finishing and Outputting > Adjusting Video Levels for Broadcast

Adjusting Video Levels for Broadcast

One of the most common problems with video levels is that sometimes the whites of an image, or the luminance levels, are too bright. This can be a serious consideration, because the FCC mandates that no video should be broadcast with a luminance level over 100 IRE, which is considered to be broadcast safe. (IRE is a unit of measurement in video that was named for the organization that created it—the Institute of Radio Engineers.) If video does go over 100 IRE, the video level is clipped during broadcast, similar to the way audio is clipped when it peaks over 0 dB. Some networks or facilities may reject the tape and choose not to air it at all.

To prepare the video portion of your sequence for output, you will need to monitor the luminance levels of your clips, then lower those that are too bright. Final Cut Pro has a tool called Range Check that will check both the luma and chroma of a clip to determine whether they are within an acceptable broadcast range. When you find clips that are not within broadcast specifications, you can apply the Broadcast Safe filter to correct them. Use the Video Scopes tool as a reference when viewing video levels.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint