0056W - GOP Alignment
v1.0
published
0056W
v1.0
GOP ALIGNMENT
GOP Alignment
User Profile
Matches Requirements
Alignment, Mismatch Value
https://qc.ebu.io/items/0056W/versions/1-0-0/
Check
Report
Summary
- EBU QC Id
- 0056W
- Name
- GOP Alignment
- Status
- published
- Category
- objective
- Lead editor
- Eric Carson
- Aliases
- EBP alignment IDR frame alignment
- Tags
- video
Versions
| Version | Status | Edition date | Saved by | Note |
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Details
- Definition
- Check for GOP Alignment across an adaptive bit rate playlist and fileset.
- References
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OC-SC-EBPI01
Remark: CableLabs Open Cable
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H.264
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MPEG-2
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MPEG Transport Stream
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- Examples
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Input parameters
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Output parameters
| Name | Description |
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Test material
| Title | Version | Download |
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Remarks
- Remarks
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Two possible methods:
1. If EBP is present in the Transport Stream (EBP is from CableLabs Open Cable specification OC-SC-EBPI01) then this container level boundary point must align across all containers in the fileset, within a user defined threshold, when checking audio containers. If the container declares an audio threshold, the user threshold will not be used;
2. If EBP is not present, check for IDR frame alignment across all video streams in the fileset.
The user threshold is defined in milliseconds, and the threshold allows for a +/- time from the strict alignment, and this threshold only applies to audio containers when EBP is present.
User discussions
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