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Add ll-hls to stream (#19530)

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Co-authored-by: Franck Nijhof <git@frenck.dev>
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uvjustin 2021-09-30 15:24:10 +08:00 committed by GitHub
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source/_integrations/stream.markdown
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@ -24,6 +24,19 @@ The `stream` integration is automatically loaded by `default_config` and enabled
stream:
```
## LL-HLS
There is the option to enable LL-HLS for lower latency. Please note that LL-HLS has strict timing and network requirements that can be hard to meet, so this option may not work on all setups. As HTTP/2 is required by the LL-HLS specification, the use of an HTTP/2 enabled reverse proxy is strongly recommended.
To enable LL-HLS, add the following to your `configuration.yaml`:
```yaml
# Example LL-HLS configuration.yaml entry.
stream:
ll_hls: true
part_duration: 0.75 # Range of 0.2 to 1.5
segment_duration: 6 # Range of 2 to 10
```
## Technical Details
The integration currently supports proxying H.264 and H.265 source streams to the HLS protocol and requires at least FFmpeg >= 4. Note that H.265 support is limited to Safari, iOS, and Android. The `stream` integration also provides limited support for audio. PCM codecs (e.g. G.711/G.723/G.726/G.729) are not supported. ADTS AAC audio is also currently not supported. Most other AAC and MP3 encoded audio should work.