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Useful built-in macOS command-line utilities

(weiyen.net)
700 points yen223 | 1 comments | 06 Nov 24 05:51 UTC | HN request time: 0s | source
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daneel_w ◴[06 Nov 24 16:42 UTC] No.42064988[source]▶
A couple more:

    afconvert(1) - an audio file format converter, which includes Apple's superior AAC codec from the Core Audio framework

    diskutil(8) - tons of tools for fixed and removable storage
Examples:

    afconvert in.wav -o out.m4a -q 127 -s 2 -b 160000 -f m4af -d 'aac '

    mb=300; diskutil eraseVolume APFS myramdisk `hdiutil attach -nomount ram://$((mb*2048))`
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hk1337 ◴[06 Nov 24 18:03 UTC] No.42066466[source]▶
How does that compare with ffmpeg? The arguments seem about the same.
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daneel_w ◴[06 Nov 24 18:56 UTC] No.42067397[source]▶
ffmpeg offers a few different encoders for many of its supported audio/video formats, and the result depends on what encoder you tell ffmpeg to use. It does not have support for using Core Audio on macOS but it does offer FDK AAC, which is one of the better AAC encoders available today - though not nearly as good as the one available in Core Audio.
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1. satellitemx ◴[06 Nov 24 23:35 UTC] No.42071269[source]▶
It does. -c:a aac_at uses Core Audio (_at means AudioToolbox).