feat(room-io): add json_format option for timed transcription output#5472
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feat(room-io): add json_format option for timed transcription output#5472
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Adds `json_format` to `TextOutputOptions` so the transcription stream on the `lk.transcription` topic emits each chunk as a JSON object with `text` and optional `start_time`/`end_time` fields when the chunk is a `TimedString`. This makes it easier for clients to consume TTS-aligned timed transcripts.
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Summary
json_formatfield toTextOutputOptionsfor the room text output chainlk.transcriptiondatastream topic is a JSON object withtext, andstart_time/end_timeif the chunk is aTimedStringneeds livekit/protocol#1502