On 2019-05-23 10:58:54 (+0200), Louigi Verona wrote: > There are several questions here. > > 1. Which tool to use for transcoding. Should it be SoX, or FFmpeg, or > something else? A lot of the info out there seems to favor SoX, but a lot > of that info is pretty old. I'm currently maintaining sox for Arch Linux and I would suggest to use ffmpeg instead. It's by far the more active and maintained upstream.
Sox is pretty much dead by now (hasn't seen a release since 2015). The latest (two year old) fixes for pretty extreme CVEs [1] haven't even found their way into a latest stable release [2] anymore and getting no answer on such a request doesn't exactly nurture my belief in the project. However, the patches have been applied on master. Looking at the current list of CVEs, I see, that it has gained yet another four CVEs this year alone, that I have to add to the list of patches! This is literally nothing you would want to put into an automated pipeline (but it's also your developer's/ your call ;-) ). > 2. Does it make sense to resample to 44100 or to 48000? If it were opus, > the answer if simple: 48000, because that's what the opus spec actually > recommends. There is no such recommendation for mp3 files. Also, upsampling > is not an innocent procedure and the converter has to be of high quality as > well. Not an expert, but I wouldn't recommend upsampling. Best, David [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=sox [2] https://sourceforge.net/p/sox/mailman/message/36432794/ -- https://sleepmap.de
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