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fix broken link to on-demand section

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Scott Lamb 2021-05-15 21:53:36 -07:00
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design/schema.md
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@ -229,12 +229,13 @@ duration of recordings.
at the end of each file. At the bitrates described in "Background", this
is an insignicant .02% waste for main streams and .5% waste for sub
streams.
* Number of "slices" in .mp4 files. As described [below](#on-demand),
`.mp4` files will be constructed on-demand for export. It should be
possible to export an hours-long segment without too much overhead. In
particular, it must be possible to iterate through all the recordings,
assemble the list of slices, and calculate offsets and total size. One
minute seems acceptable; though we will watch this as work proceeds.
* Number of "slices" in .mp4 files. As described
[below](#on-demand-mp4-construction), `.mp4` files will be constructed
on-demand for export. It should be possible to export an hours-long segment
without too much overhead. In particular, it must be possible to iterate
through all the recordings, assemble the list of slices, and calculate
offsets and total size. One minute seems acceptable; though we will watch
this as work proceeds.
* Crashes. On program crash or power loss, ideally it's acceptable to simply
discard any recordings in progress rather than add a checkpointing scheme.
* Granularity of retention. It should be possible to extend retention time
@ -669,7 +670,7 @@ See also the example below:
| varint2 | 2000 | 20 | 10 | 5 | 100 |
| encoded | `29 d0 0f` | `02 14` | `08 0a` | `02 05` | `01 64` |
### <a href="on-demand"></a>On-demand `.mp4` construction
### On-demand `.mp4` construction
A major goal of this format is to support on-demand serving in various formats,
including two types of `.mp4` files: