Packages with the amr use flag

media-libs / avidemux-plugins : Plugins for the video editor media-video/avidemux

media-libs / mediastreamer : Mediastreaming library for telephony application

  • Use of AMR Narrow Band codec plugin

media-sound / sox : The swiss army knife of sound processing programs

  • Enables Adaptive Multi-Rate Audio support

media-video / ffmpeg : Complete solution to record, convert and stream audio and video. Includes libavcodec

  • Enables Adaptive Multi-Rate Audio support

media-video / libav : Complete solution to record, convert and stream audio and video

  • Enable Adaptive Multi-Rate Audio support

net-libs / pjproject : Open source SIP, Media, and NAT Traversal Library

  • Inlcude AMR codec in the build