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Make an opus chaptered 16kbps audiobook with freac (free GPL) freac.org (Windows, Mac, Linux)

— General Settings
Filename pattern: <artist> - <album>
artist = Author of audiobook
album = Title of audiobook

under Tags section you only need to check Vorbis Comment as opus is the successor to ogg vorbis. You don't need ID3v2 or other ones so just uncheck the rest.

Selected encoder: Opus Audio Encoder
click Configure Selected Audio Encoder

1) Encoding mode: Voice (Auto is ok too)

2) File extension: opus (oga is a container but it's for various audio codecs and opus can embed cover art and metadata and chapters)

3) Uncheck Enable variable bitrate encoding. Won't save you anything. Can use for music encoding at 96kbps though if you wish.

4) Bitrate: 16kbps which is just as good as 32kbps m4b AAC in my tests. Obviously is half the file size as 32kbps.

www.tg-me.com/ca/GeekTips/com.geektips/287

119 viewsedited  Mar 13, 2022 at 01:43

Make an opus chaptered 16kbps audiobook with freac (free GPL) freac.org (Windows, Mac, Linux)

— General Settings
Filename pattern: <artist> - <album>
artist = Author of audiobook
album = Title of audiobook

under Tags section you only need to check Vorbis Comment as opus is the successor to ogg vorbis. You don't need ID3v2 or other ones so just uncheck the rest.

Selected encoder: Opus Audio Encoder
click Configure Selected Audio Encoder

1) Encoding mode: Voice (Auto is ok too)

2) File extension: opus (oga is a container but it's for various audio codecs and opus can embed cover art and metadata and chapters)

3) Uncheck Enable variable bitrate encoding. Won't save you anything. Can use for music encoding at 96kbps though if you wish.

4) Bitrate: 16kbps which is just as good as 32kbps m4b AAC in my tests. Obviously is half the file size as 32kbps.

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