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OPUS → M4A
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Upload an OPUS audio file and save it as M4A for players, messengers, editing, publishing or archiving.
OPUS is an audio file that is encoded using the Ogg Opus format (lossy coding). It was created for online audio streaming, that is, in order to transmit sound through a global network. The format is being developed by the Internet Engineering Task Force (IETF) and Xiph.Org communities. Applies SILK codecs when used in Skype and CELT (from Xiph.Org), provides support for variable bitrate. Most often, the OPUS codec is used for video conferencing, game chats, VoIP telephony.
OPUS is a free audio codec that has international standard status (IETF RFC 6716). Its main advantages are a low coding delay (from 2.5 to 60 ms) and its significant speed, an increased degree of compression of audio data with high-quality sound, as well as support for multi-channel audio (within 255 channels).
In 2011, J. Skeglund of Google conducted two series of tests, during which OPUS coding and decoding were compared, taking into account the assessments of experts and ordinary listeners. Studies have shown that OPUS provides stereo music with the same quality as MP3 and better quality than G.719 64 kbps.
OPUS offers great streaming capabilities with dynamic tweaking and very low latency. This is always high sound quality and excellent data compression. Full support for OPUS is provided by Mozilla applications. He is the key Skype audio codec.
ALAC is the format of a small specialized program called an audio codec. Its main task is to compress a file with digital music without losing its quality. The name of the format created by Apple's IT giant is Apple's abbreviation Lossless Audio Codec. This format may also be called ALE (from Apple Lossless Encoder). Files in this format can play devices even with limited computing resources - such as an iPod. When compressing a file in this format, it is approximately 40-60% of the original file. Now almost every multimedia player based on the libavcodec library is able to play ALAC format files.
Supported formats
This converter shows the accepted source formats and the result format.
Input files
OPUS
M4A
M4P
FLAC
APE
AAC
AC3
AIF
AIFF
RA
RM
CAF
VOC
OGA
OGG
WMA
MP2
MP3
MPGA
WAV
MPC
3GA
MKA
KAR
MMF
M4R
AMR
EAC3
WEBA
IMY
MXMF
OTA
RTTTL
RTX
XMF
MID
MIDI
AWB
Result
M4A
A damaged file or a non-standard codec can still fail even when the extension is supported.
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