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A comment on The Case of the Extra 40ms. Parent comment

Re:The Case of the Extra 40ms by cprecioso on Tuesday December 15, 2020 @04:51AM (#25428646)
For cropping audio files, QuickTime can do it. Look in its menus. Also transcoding video files (to what extent this might be “compression” depends on your use case).

PDF page manipulation is the easiest thing on macOS, also quite robust usually. Just open the document in Preview and open the page sidebar. You can reorder or remove pages there; or drag and drop pages from other documents.

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Re:The Case of the Extra 40ms by whywhywhywhy on Tuesday December 15, 2020 @11:14AM (#25431598)
>For cropping audio files, QuickTime can do it. Look in its menus. Also transcoding video files

Quicktime Pro could do this all very well, Quicktime X however? It can trim but the UI is bad and encoding options are so limited I stopped using it all together.

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