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CFHD Test Streams
Thomas Stockhammer edited this page Dec 16, 2020
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This information is outdated. The latest information is here: https://github.com/cta-wave/Test-Content-Generation/blob/master/Instructions/cfhd.md
This is a version of the list in the Word file attached to #9.
The content options are all taken verbatim from the CFHD section of the WAVE device playback capabilities spec.
It is built up as follows;
- Stream 1 is the base stream.
- Streams 2 and 3 are for testing AVC content options. Stream 2 differs from the base as much as possible. Every content option is different. It may of course not be possible to generate this using ffmpeg.
- Stream 3 is for the content options that have 3 possibilities and differs from the base only for those content options. It is of course possible to re-balance streams 2 and 3 & make stream 2 closer to the base and stream 3 further away.
- Streams 4 through 11 are for debugging if either streams 2 or 3 fail to play. Each of them differs from the base by exactly one content option.
- Streams 1 and 12 through 15 are a simple content ladder for testing CMAF switching sets.
This is a straw-man proposal to provoke reaction. All values are arbitrary and should be corrected by people who know more about this than I do.
- Stream 1 should have content options that are representative of existing industry practice.
- The resolutions and bitrates in the simple content ladder in streams 12 through 15 should also be representative of existing practice
- In this table, I've only included streams that are 60s long (the same as the mezzanine). We also have mezzanine streams that are 210s. We need to double check if any of these are needed for AVC.
| Stream ID | picture timing SEI message | VUI timing information | Sample entry (CMAF 9.4.1.2) | CMAF fragment duration | Initialization constraints | Fragments containing one or multiple moof/mdat pairs | resolution | frame rate | bitrate | length |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 = base stream | present | present | avc1 sample entry type (parameter sets within the CMAF Header) | 2s | Regular Switching Set, do not apply CMAF clause 7.3.4.2 and 9.2.11.4 | Fragment is 1 chunk | 1920x1080 | 25 or 30 | 4000000 | 60s |
| 2 | not present | not present | avc3 sample entry type (in-band parameter sets) without parameter sets within the CMAF header | 5s | Single initialization constraints, see CMAF clause 7.3.4.2 and 9.2.11.4 | Fragment contains multiple chunks (p-frame to p-frame with b-frames) | as 1 | as 1 | as 1 | as 1 |
| 3 | as 1 | as 1 | avc3 sample entry type (in-band parameter sets) with parameter sets within the CMAF header | as 1 | as 1 | Each sample constitutes a chunk (p-frame only) | as 1 | as 1 | as 1 | as 1 |
| 4 | as 2 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 5 | as 1 | as 2 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 6 | as 1 | as 1 | as 2 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 7 | as 1 | as 1 | as 3 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 8 | as 1 | as 1 | as 1 | as 2 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 9 | as 1 | as 1 | as 1 | as 1 | as 2 | as 1 | as 1 | as 1 | as 1 | as 1 |
| 10 | as 1 | as 1 | as 1 | as 1 | as 1 | as 2 | as 1 | as 1 | as 1 | as 1 |
| 11 | as 1 | as 1 | as 1 | as 1 | as 1 | as 3 | as 1 | as 1 | as 1 | as 1 |
| 12 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | 1024x576 | as 1 | 2200000 | as 1 |
| 13 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | 1024x576 | as 1 | 1600000 | as 1 |
| 14 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | 768x432 | as 1 | 1000000 | as 1 |
| 15 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | 512x288 | as 1 | 512000 | as 1 |
| 16 | as 1 | as 1 | as 1 | as 1 | as 1 | as 1 | 512x288 | half of 1 | 512000 | as 1 |