23 May
2019
23 May
'19
1:59 p.m.
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/
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