This appendix describes the audio data and file formats supported in Core Audio in OS X v10.5.

  1. Audio Codec For Mac
  2. Audio Codecs For Mac Windows 10
  3. Audio Codec Pack For Mac
  4. Lossless Audio Decoder For Mac Os X
  5. Audio Codecs Mac Os X

Each audio file type lists the data formats supported for that type. That is, a converter exists to convert data from the particular file format to any of the listed data formats. Some data formats (such as AC3) cannot be converted to a linear PCM format and therefore cannot be handled by standard audio units.

A Core Audio Format (CAF) file can contain audio data of any format. Any application that supports the CAF file format can write audio data to the file or extract the data it contains. However, the ability to encode or decode the audio data contained within it is dependent on the audio codecs available on the system.

  1. You are missing an audio codec or the audio is a format that is not supported. To check which audio codec your file is encoded with, see No audio or audio is distorted with DivX movie playback on a Mac for reference. Note: If your file is encoded with MPEG2 or AC3, see Missing Audio Codec for Mac for reference.
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Table D-1 Allowable data formats for each file format.

File Format

Data Formats

AAC (.aac, .adts)

'aac '

AC3 (.ac3)

'ac-3'

AIFC (.aif, .aiff,.aifc)

BEI8, BEI16, BEI24, BEI32, BEF32, BEF64, 'ulaw', 'alaw', 'MAC3', 'MAC6', 'ima4' , 'QDMC', 'QDM2', 'Qclp', 'agsm'

AIFF (.aiff)

BEI8, BEI16, BEI24, BEI32

Apple Core Audio Format (.caf)

'.mp3', 'MAC3', 'MAC6', 'QDM2', 'QDMC', 'Qclp', 'Qclq', 'aac ', 'agsm', 'alac', 'alaw', 'drms', 'dvi ', 'ima4', 'lpc ', BEI8, BEI16, BEI24, BEI32, BEF32, BEF64, LEI16, LEI24, LEI32, LEF32, LEF64, 'msx00x02', 'msx00x11', 'msx001', 'msx00U', 'ms x00', 'samr', 'ulaw'

MPEG Layer 3 (.mp3)

'.mp3'

MPEG 4 Audio (.mp4)

'aac '

MPEG 4 Audio (.m4a)

'aac ', alac'

NeXT/Sun Audio (.snd, .au)

BEI8, BEI16, BEI24, BEI32, BEF32, BEF64, 'ulaw'

Sound Designer II (.sd2)

BEI8, BEI16, BEI24, BEI32

WAVE (.wav)

LEUI8, LEI16, LEI24, LEI32, LEF32, LEF64, 'ulaw', 'alaw'

Key for linear PCM formats. For example, BEF32 = Big Endian linear PCM 32 bit floating point.

Table D-2 Key for linear PCM formats

LE

Little Endian

BE

Big Endian

F

Floating point

I

Integer

UI

Unsigned integer

8/16/24/32/64

Number of bits

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Core Audio includes a number of audio codecs that translate audio data to and from Linear PCM. Codecs for the following audio data type are available in OS X v10.4. Audio applications may install additional encoders and decoders.

Audio data type

Encode from linear PCM?

Decode to linear PCM?

MPEG Layer 3 ('.mp3')

No

Yes

MACE 3:1 ('MAC3')

Yes

Yes

MACE 6:1 ('MAC6')

Yes

Yes

QDesign Music 2 ('QDM2')

Yes

Yes

QDesign ('QDMC')

No

Yes

Qualcomm PureVoice ('Qclp')

Yes

Yes

Qualcomm QCELP ('qclq')

No

Yes

AAC ('aac ')

Yes

Yes

Apple Lossless ('alac')

Yes

Yes

Apple GSM 10:1 ('agsm')

No

Yes

ALaw 2:1 'alaw')

Yes

Yes

Apple DRM Audio Decoder ('drms')

No

Yes

AC-3

No

No

DVI 4:1 ('dvi ')

No

Yes

Apple IMA 4:1 ('ima4')

Yes

Yes

LPC 23:1 ('lpc ')

No

Yes

Microsoft ADPCM

No

Yes

DVI ADPCM

Yes

Yes

GSM610

No

Yes

AMR Narrowband ('samr')

Yes

Yes

µLaw 2:1 ('ulaw')

Yes

Yes



Copyright © 2017 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2017-10-30

Video

We receive several sorts of video files from various locations in different ways. For instance, we

  • Download video files, which are available online.
  • Get video clips that are recorded using our friend’s gadgets.
  • Obtain video clips from distant locations via email.
  • Transfer videos from other systems, devices to ours etc.

But, typically when any user tries to play external (received) video clips on their computer, they may face one or the other playback issues. Sometimes, these video files fail to play properly, at other times they never play at all.

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Audio

And, at this minute definitely, you will try to get another copy of the unplayable video, if possible (if it is downloaded from the internet or a friend sent you that video). If you cannot obtain the photocopy of the file, then you will try to repair the video file. But, it is not always the corruption, which makes your video file unplayable or results in playback issues. Even codec problem can cause general issues in playing your videos. and, for fixing videos tools you choose must be compatible with codec of the video. For fixing MPEG4 video files you need tool that supports this codec. Likewise, for other codecs too. Hence, it is important to know the codec of video file.

Audio Codecs For Mac Windows 10

What is Codec?

A codec is a computer software, which encodes and decodes a video or audio file. Every single audio, as well as a video file, is made up of a codec since it keeps your video/audio file tiny and makes playback easy. And, codec usually functions with your system media player as a part of it.

Codec installed on your system decodes your videos, music files, which are encoded with a specific codec and allows the media player to play them. If you are experiencing any issue while playing your videos, then you can have a guess that one of your codecs used to play the video might have got corrupted. If not, it might be that you don’t have the right codec on your computer to play the video appropriately.

Many media player including VLC has their own set of built-in codecs. But, if you are employing any other player then how to find the codec of a video that you are playing? Well, here is the way to do it.

How to find the codec of a video file using the manual method?

You can easily get video codec information on your Windows and Mac computers using your own operating system functionalities. Just follow these step by step guidance to do so.

On Windows:

Go to the location where the video file is stored

  • Select the video, whose codec info you want to know
  • Right click on the file
  • Select Properties
  • Switch to Summary tab
  • Check description
  • You will see audio format and the video compression
  • These are the used codecs for your video clip

On Mac:

Navigate the folder that holds your video clip

  • Pick the video to get its codec info
  • Right-click on the selected file
  • Click on Get Info option
  • Jump to Summary
  • Go through the information
  • You can see codecs of both audio and video format

Via VLC:

Open the video in VLC, to know its codec

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  • Go to the playlist and right click on it
  • Choose Tools
  • Select MediaInformation
  • Don’t forget to mark the checkbox Codec Details

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Note down the codecs that are used to create the video file. Now, you can download the required (noted) codecs from their official websites. Once you completed the download process, install them and open the video file using your regular media player.

Audio Codecs Mac Os X

If you cannot find out the codec information of your video file or if you feel difficulty in checking it manually or the video clip is still not playing even after you have installed the codec, then you can make use of various available tools like MediaInfo, VideoInspector, Codec Installer, GSpot, AVIcodec etc. to get adequate codec and play your video.