On Thu, Feb 07, 2019 at 10:19:39AM +0100, Nicolas George wrote: > tomas@tuxteam.de (12019-02-07): > > ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3 > > Since the original is already in MP3, -acodec copy (or -c:a copy, more > modern) will avoid re-encoding the file, and thus having the MP3 > artifacts twice. Yes, this is a very important point. More speed at more quality, this is an offer one can't decline :-) > But if you want to recode, then do not put just a codec: you would get > the default quality parameters, and they probably do not suit you. > Specify the quality you want. RTFM for that. Yes. I just wanted to present a somewhat minimalist command line to grow from. > Last: usually better to put -ss before -i, because it avoids decoding > the whole beginning of the file. Nice little optimization, right. With videos and not-that-fast hardware it'll make a noticeable difference, I guess. > > This is assuming you want to have your result as .mp3 too (consider > > a free codec like vorbis or flac, if you want lossless). > > Nowadays, Opus beats Vorbis easily. Thanks for the heads-up. I'm not that deep in codec land these days. Thanks for your comments! Cheers -- tomás
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