Difference between revisions of "Apple AAC"
From Hydrogenaudio Knowledgebase
(afconvert) |
m (Bp moved page QuickTime AAC to Apple AAC: Apple seems to be moving away from QuickTime, and the encoder is actually part of CoreAudio) |
(No difference)
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Revision as of 22:12, 28 July 2014
| Current AAC encoders (most to least recommended) | |
|---|---|
| 1 | Apple AAC M/W |
| 2 | FhG AAC (Winamp) W |
| 3 | Fraunhofer FDK AAC S/L/M/W |
| 4 | Nero AAC L/W |
| 5 | FFmpeg 3.0+ AAC encoder S/L/M/W |
| 6 | FAAC S/L/M/W |
| 7 | Libav (pre-3.0 FFmpeg) AAC encoder S/L/M/W |
| S Source code available; L Linux; M macOS; W Windows | |
| List of AAC encoders | |
QuickTime AAC is an AAC codec developed by Apple Inc. and included in Apple's media framework, QuickTime. QuickTime is used in iTunes, Safari web browser, and other Apple products. It is known to be one of the highest quality medium-bitrate CBR and VBR LC AAC encoders.
The encoder does consistently well in Hydrogenaudio listening tests.
afconvert
Apple's Mac OSX includes a command-line utility for transcoding audio files that employs this encoder when encoding to AAC.
Usage:
afconvert [options] <infile> <outfile>
Options:
- -f --file <string>
- File format. Several; use 'm4af' for '.m4a' file or 'adts' for raw '.aac' file.
- -d --data <string>
- Data format. Several; use 'aac'.
- -b --bitrate <n>
- Bitrate in bits per second.
- -s --strategy <0,1,2>
- 0 for CBR, 1 for ABR, 2 for VBR
- -q --quality <0-127>
- ??
QAAC
| Developer(s) | nu774 |
| Release information | |
|---|---|
| Stable release | ? |
| Compatibility | |
| Operating system | Windows |
| Additional information | |
| Use | Encoder |
| License | Various |
| Website | github/qaac |
QAAC is an open-source wrapper for QuickTime's AAC and ALAC encoders that allow them to be used directly in applications that don't otherwise use QuickTime. It exists only for Windows.
