Reference: Supported sampling rate and bitrate for AAC - AWS Elemental MediaLive

Reference: Supported sampling rate and bitrate for AAC

This section explains how to set the following four properties of the AAC audio codec:

  • Profile

  • Coding mode

  • Sample rate

  • Bitrate

In the console, these properties are in four fields in the Codec configuration section for the AAC codec. To get here, go to the Create channel page and choose the appropriate output in the output group. In Output settings, go to the Audio section. In Codec settings, choose Aac, then expand Codec configuration. To review the step where you complete these fields, see Step 7: Set up the audio encodes.

Note

You can set all four fields. Or you can leave all the fields with their defaults.

If you change only one or two fields, you might create a combination that is not valid. See the tables in the following sections to verify that the combination you have created is valid.

To set these four fields

  1. Choose a Coding mode.

  2. Choose a Profile that is valid with that profile. See the tables that follow this procedure.

  3. Choose a Sample rate that is valid for that combination of profile and coding mode.

  4. Choose a Bitrate that falls within the range that is supported for that sample rate.

Coding mode 1.0

In this table, read down the rows to find the profile that you want. Then read across to find a valid combination of sample rate and bitrate.

Profile Sample rate (Hz) Minimum valid bitrate (bits/sec) Maximum valid bitrate (bits/sec)
HEv1 22050 8000 12000
24000 8000 12000
32000 12000 64000
44100 18000 64000
48000 18000 64000
LC 8000 8000 14000
12000 8000 14000
16000 8000 28000
22050 24000 28000
24000 24000 28000
32000 32000 192000
44100 56000 256000
48000 56000 288000
88200 288000 288000
96000 128000 288000

Coding mode 1+1

In this table, read down the rows to find the profile that you want. Then read across to find a valid combination of sample rate and bitrate.

Profile Sample rate (Hz) Minimum valid bitrate (bits/sec) Maximum valid bitrate (bits/sec)
HEv1 32000 24000 128000
44100 40000 192000
48000 40000 192000
96000 224000 256000
LC 8000 16000 28000
12000 16000 28000
16000 16000 56000
22050 48000 56000
24000 48000 56000
32000 64000 384000
44100 112000 512000
48000 112000 576000
88200 256000 576000
96000 256000 576000

Coding mode 2.0

In this table, read down the rows to find the profile that you want. Then read across to find a valid combination of sample rate and bitrate.

Profile Sample rate (Hz) Minimum valid bitrate (bits/sec) Maximum valid bitrate (bits/sec)
HEv1 32000 16000 128000
44100 16000 96000
48000 16000 128000
96000 96000 128000
HEv2 22050 8000 12000
24000 8000 12000
32000 12000 64000
44100 20000 64000
48000 20000 64000
LC 8000 16000 20000
12000 16000 20000
16000 16000 32000
22050 32000 32000
24000 32000 32000
32000 40000 384000
44100 96000 512000
48000 64000 576000
88200 576000 576000
96000 256000 576000

Coding mode 5.1

In this table, read down the rows to find the profile that you want. Then read across to find a valid combination of sample rate and bitrate.

Profile Sample rate (Hz) Minimum valid bitrate (bits/sec) Maximum valid bitrate (bits/sec)
HEv1 32000 64000 320000
44100 64000 224000
48000 64000 320000
96000 240000 320000
LC 32000 160000 768000
44100 256000 640000
48000 256000 768000
96000 640000 768000

Coding mode ad receiver mix

Choose this coding mode if you have an AD (audio description) audio track that you want to include in the output.

In this table, read down the rows to find the profile that you want. Then read across to find a valid combination of sample rate and bitrate.

Profile Sample rate (Hz) Minimum valid bitrate (bits/sec) Maximum valid bitrate (bits/sec)
HEv1
22050 8000 12000
HEv1 24000 8000 12000
32000 12000 64000
44100 20000 64000
48000 20000 64000
LC 8000 8000 14000
12000 8000 14000
16000 8000 28000
22050 24000 28000
24000 24000 28000
32000 32000 192000
44100 56000 256000
48000 56000 288000
88200 288000 288000
96000 128000 288000