- EBU QC Id
- 0016B
- Name
- Constant Colour Frames
- Status
- published
- Category
- objective
- Lead editor
- Eric Carson
- Aliases
- black frames coloured frames flash frames monochrome frames single colour frames colored frames single color frames constant color frames
- Tags
- video
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- Definition
- Used in Checks, the system shall verify if the video contains frames which have no active video and identify full-sized or at least major areas of single coloured frames. Optionally the system may report the segments where single coloured frames appear. The minimum temporal duration and spatial area that count as a detection are set by the Minimum Duration and Minimum Area input parameters.
Used in Reports, the system reports the segments where single coloured frames appear and which colour they have. - References
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- Examples
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Input: "Minimum Duration" = 3 frames
Input: "Minimum Area" = 90.00%
Input: "Colour To Check" = #000000
Input: "Colour Tolerance" = 10.5%
Output: "Check Result" = trueRemark: Used as a Check. CheckResult = true means that no coloured frames (incl. black) were found in the analysed video.
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Input: "Minimum Duration" = 3 frames
Input: "Minimum Area" = 90.00 %
Output: "Coloured Frames Segment" from 10:00:00;00 to 10:00:05;00
--> "Colour Detected" = #000000
--> "Minimum Area" = 91.00 %
--> "Maximum Area" = 100.00 %
Output: "Coloured Frames Segment" from 10:04:01;00 to 10:04:01;06
--> "Colour Detected" = #DD1100
--> "Minimum Area" = 92.00 %
--> "Maximum Area" = 95.00 %
Remark: Used as a Report. The system reports the video segments that are single colour frames.
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- Remarks
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Coloured frames can be caused by software errors in the production cycle (e.g. within GOP-based file structures, SDI failure, splicing errors, and unlinked content in NLEs).
Note there is also an EBU QC Test Item that checks for expected Black Frames, such as 'commercial black': #0272B (Latest version) .
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