Select the audio track for transcription
Select which (audio) track to use as a source
Live streams may contain multiple audio tracks, and you can select which audio track to use. If you want to transcribe multiple audio tracks, refer to the multi-track audio feature.
HLS source
Timbra uses the default audio track of the HLS stream as the source for transcription. You can customise this by going to the live project configuration, open “Advanced options” and specifying the “HLS transcription URL”.
You’ll need to restart the captioning process to pick up the captions.
RTMP/SRT source
If your RTMP or SRT contains multiple audio streams, you can provide a Packet Identifier (PID) to select the audio track to transcribe in the Source tab.
Use cases
You can use this feature to:
- Select the source language in a multilingual stream
- Select the correct audio track in a stream with multiple encoding variants or backups
- Select a non-default audio track, for example an audio track without music, or the Audio Description track
- Fail over to a backup audio stream
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