0044B - Video Freeze
v1.0
published
0044B
v1.0
VIDEO FREEZE
Multiple Adjacent Still Frames
Exclude Black, Silence Required
# of Frames, Similarity
Similarity, Threshold Exceeded
https://qc.ebu.io/items/0044B/versions/1-0-0/
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Report
Summary
- EBU QC Id
- 0044B
- Name
- Video Freeze
- Status
- published
- Category
- objective
- Lead editor
- Andy QUESTED
- Aliases
- freeze frames still frames
- Tags
- video
Versions
| Version | Status | Edition date | Saved by | Note |
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Details
- Definition
- System shall identify multiple adjacent identical (or near-identical) frames which constitute 'frozen' (i.e. non-moving) pictures.
- References
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- Examples
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Input: "Minimum Freeze Duration "= 5 Frames
Input: "Similarity Threshold "= 0.85
Output: "Freeze Frames"=True
Output:"Video Freeze Segments":
01:00:02:00 to 001:00:02:20, Average Similarity 0.91
01:00:02:00 to 002:05:03:00, Average Similarity 0.89
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Input parameters
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Output parameters
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Test material
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Remarks
- Remarks
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It may be helpul to provide additional configuration options, for example: ignore black frames, report freeze only if accompanied by audio silence.
System may be set tightly to only detect identical frames occurring for a given period (e.g. 5 seconds) .
Decisions if pixels are 'near identical' or not could be based on luminance differences of corresponding pixels of adjacent frames. In practice pixels are very often not exactly identical in freeze frames, e.g. due to encoding after freeze.
User discussions
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