Use the NEON (ASIMD) instruction set
Name Category Description
ffmpeg media-video Complete solution to record, convert and stream audio and video. Includes libavcodec
graphene media-libs A thin layer of types for graphic libraries
libaom media-libs Alliance for Open Media AV1 Codec SDK
openal media-libs A software implementation of the OpenAL 3D audio API
opus media-libs Open codec designed for internet transmission of interactive speech and audio
speexdsp media-libs Audio compression format designed for speech -- DSP
vo-aacenc media-libs VisualOn AAC encoder library
x265 media-libs Library for encoding video streams into the H.265/HEVC format

Thank you!