Multiple Audio Tracks
Multiple audio tracks using Video Cloud
- When you create a live channel, expand the Audio Tracks section and add each track before you save the channel.
- Click Add Audio Track.
- For each track, enter the Language Code and PID. A label is not required.
- Click Add Audio Track again for each additional audio track you need.
- After you have specified all audio tracks, click Save.
- You can see your audio tracks in the Audio Renditions section on the Overview tab.
Multiple audio tracks using the API
You can create a Brightcove Live Channel that supports multiple audio tracks using the Live API.
To configure multiple audio tracks correctly:
- Ensure your encoder is configured with the appropriate audio PIDs (Packet Identifiers) for each audio track you intend to stream.
-
The
input_selectorsdefined in your Live API request must reference those same audio PIDs. -
The
output.input_selector_namein your job configuration must match theaudio_pidsname defined in the input selectors.
API Request
To create the Live Channel, send a POST request to the following endpoint:
https://api.live.brightcove.com/v2/accounts/{your_account_id}/jobs
Below is an example of a request body for creating a Live Channel with multiple audio tracks:
{
"name": "Multiple Audio tracks 3",
"description": "Created via API",
"type": "event",
"region": "us-east-1",
"input": {
"protocol": "srt",
"audio_pids": [
{
"name": "english",
"pid": 475
},
{
"name": "french",
"pid": 476
}
],
"fixed_ingest_ip": false
},
"outputs": {
"video": [
{
"label": "hls270p",
"height": 270,
"width": 480,
"bitrate": 450000,
"codec": "h264",
"codec_options": {
"level": "3",
"profile": "main"
},
"framerate": "30/1",
"num_b_frames": 3,
"num_reference_frames": 4,
"keyframe_rate": 0.5,
"sample_aspect_ratio": "1:1",
"decoder_buffer_size": 675000,
"max_bitrate": 540000
},
{
"label": "hls360p",
"height": 360,
"width": 640,
"bitrate": 780000,
"codec": "h264",
"codec_options": {
"level": "3",
"profile": "main"
},
"framerate": "30/1",
"num_b_frames": 3,
"num_reference_frames": 4,
"keyframe_rate": 0.5,
"sample_aspect_ratio": "1:1",
"decoder_buffer_size": 1170000,
"max_bitrate": 936000
},
{
"label": "hls540p",
"height": 540,
"width": 960,
"bitrate": 1500000,
"codec": "h264",
"codec_options": {
"level": "3.2",
"profile": "main"
},
"framerate": "30/1",
"num_b_frames": 3,
"num_reference_frames": 4,
"keyframe_rate": 0.5,
"sample_aspect_ratio": "1:1",
"decoder_buffer_size": 2250000,
"max_bitrate": 1800000
},
{
"label": "hls720p",
"height": 720,
"width": 1280,
"bitrate": 2400000,
"codec": "h264",
"codec_options": {
"level": "4",
"profile": "high"
},
"framerate": "30/1",
"num_b_frames": 3,
"num_reference_frames": 4,
"keyframe_rate": 0.5,
"sample_aspect_ratio": "1:1",
"decoder_buffer_size": 3600000,
"max_bitrate": 2880000
},
{
"label": "hls1080p",
"height": 1080,
"width": 1920,
"bitrate": 4500000,
"codec": "h264",
"codec_options": {
"level": "4.2",
"profile": "high"
},
"framerate": "30/1",
"num_b_frames": 3,
"num_reference_frames": 4,
"keyframe_rate": 0.5,
"sample_aspect_ratio": "1:1",
"decoder_buffer_size": 6750000,
"max_bitrate": 5400000
}
],
"audio": [
{
"label": "english",
"input_selector_name": "english",
"language_code": "eng",
"codec": "aac",
"bitrate": 128000,
"sample_rate": 48000
},
{
"label": "french",
"input_selector_name": "french",
"language_code": "fra",
"codec": "aac",
"bitrate": 128000,
"sample_rate": 48000
}
]
},
"manifest": {
"name": "playlist",
"segment_duration_seconds": 6,
"playlist_window_seconds": 30,
"hls": {}
},
"maintenance_preferences": {
"day": "WEDNESDAY",
"start_time": "02:00"
},
"playback_rights_id": "primary"
}