~]$ ffmpeg -i Kalimba.mp3 -c:a libfaac Kalimba.m4aįfmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developersīuilt on 09:33:27 with gcc 4.4.6 20120305 (Red Hat 4.4.6-4)Ĭonfiguration: -enable-libfaac -enable-nonfree -disable-yasm Please provide a resolution to this problem. I have compiled ffmpeg with faac enabled. An Opus stream can support up to 255 audio channels, and it allows channel coupling between channels in groups of two using mid-side coding.I am fully aware the legal constraints in using libfaac but this is just for my testing purpose. Opus supports constant and variable bitrate encoding from 6 kbit/s to 510 kbit/s, frame sizes from 2.5 ms to 60 ms, and five sampling rates from 8 kHz (with 4 kHz bandwidth) to 48 kHz (with 20 kHz bandwidth, the human hearing range). M4A is often compressed using AAC encoding (lossy), but can also be in Apple Lossless format. This is especially true of non-protected content.

Opus is a lossy audio coding format developed by Xiph and standardized by the IETF, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low end ARM3 processors.Īudio-only MPEG-4 files generally have a. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files. MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. International Organization for Standardization

Ffmpeg convert m4a to mp3