This commit is contained in:
leo
2026-09-02 11:31:58 +02:00
parent 9cb19e1906
commit 653e67de56
8 changed files with 149 additions and 54 deletions
+2 -2
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@@ -99,7 +99,7 @@ sequenceDiagram
| **RECORDING_ENCODING_DEFAULT_RESOLUTION** | String | `"720p"` | Resolution used by the default encoding. When set, must be a key of `RECORDING_ENCODING_AVAILABLE_RESOLUTIONS`. Leave unset (together with, or instead of, the default profile) to disable the custom default encoding and fall back to LiveKit's built-in preset (a startup warning is emitted). |
| **RECORDING_ENCODING_DEFAULT_PROFILE** | String | `"full"` | Profile used by the default encoding. When set, must be a key of `RECORDING_ENCODING_AVAILABLE_PROFILES`. Leave unset (together with, or instead of, the default resolution) to disable the custom default encoding and fall back to LiveKit's built-in preset (a startup warning is emitted). |
| **RECORDING_ENCODING_AUDIO_BITRATE_KBPS** | Integer | `128` | AAC audio bitrate in kbps used in the default encoding. |
| **RECORDING_ENCODING_KEY_FRAME_INTERVAL_S** | Float | `4.0` | Keyframe interval in seconds. Drives seek granularity in the recorded MP4 (a player can only seek to keyframe boundaries). Larger values give the encoder slightly more bits for non-keyframe content at a fixed bitrate. `4.0` is a standard VOD value. |
| **RECORDING_ENCODING_KEY_FRAME_INTERVAL_S** | Float | `0.0` | Keyframe interval in seconds. Drives seek granularity in the recorded MP4 (a player can only seek to keyframe boundaries). Larger values give the encoder slightly more bits for non-keyframe content at a fixed bitrate. `0` leaves the field unset, letting the encoder pick; `4.0` is a standard VOD value. |
> [!NOTE]
@@ -135,7 +135,7 @@ Every video recording is encoded from a default resolved from `RECORDING_ENCODIN
Encoding is chosen from two maps: `RECORDING_ENCODING_AVAILABLE_RESOLUTIONS` (`resolution → {"width", "height"}`) and `RECORDING_ENCODING_AVAILABLE_PROFILES` (`profile → {"fps", "kbps": {resolution: video_bitrate_kbps}}`):
- **Default**: `RECORDING_ENCODING_DEFAULT_PROFILE` + `RECORDING_ENCODING_DEFAULT_RESOLUTION` set the encoding used by every recording that doesn't override it. Leave either unset to fall back to LiveKit's built-in preset (a startup warning is emitted).
- **Per recording (opt-in)**: set `RECORDING_CUSTOM_ENCODING_ENABLED=True` to let clients override the default per recording. The start-recording API then accepts an `encoding` object selecting a `resolution` (required) and `profile` (optional): a resolution-only request sets the frame size but leaves LiveKit's default framerate/bitrate; adding a profile pins fps and bitrate too. When `RECORDING_CUSTOM_ENCODING_ENABLED=False`, the API rejects any per-recording `encoding` and the default is used.
- **Per recording (opt-in)**: set `RECORDING_CUSTOM_ENCODING_ENABLED=True` to let clients override the default per recording. The start-recording API then accepts an `encoding` object selecting a `resolution` (required) and `profile` (optional): a resolution-only request keeps `RECORDING_ENCODING_DEFAULT_PROFILE` for fps and bitrate, so clients can only pick from pre-defined values. When `RECORDING_CUSTOM_ENCODING_ENABLED=False`, the API rejects any per-recording `encoding` and the default is used.
The resolved values are passed straight through LiveKit's `EncodingOptions.advanced` to the GStreamer pipeline (`x264enc` for video, `faac` for audio), so there are no hidden conversions — what the profile/resolution resolve to is what the encoder receives.