libopencore-amrnb
OpenCORE Adaptive Multi-Rate Narrowband encoder.
Requires the presence of the libopencore-amrnb headers and library during configuration. You need to explicitly configure the build with --enable-libopencore-amrnb --enable-version3.
This is a mono-only encoder. Officially it only supports 8000Hz sample rate, but you can override it by setting 'strict' to 'unofficial' or lower.
Options
- 'b'
-
Set bitrate in bits per second. Only the following bitrates are supported, otherwise libavcodec will round to the nearest valid bitrate.
- '4750'
- '5150'
- '5900'
- '6700'
- '7400'
- '7950'
- '10200'
- '12200'
- '5150'
- '4750'
- 'dtx'
-
Allow discontinuous transmission (generate comfort noise) when set to 1. The default value is 0 (disabled).