On 2014-09-05 03:46, F style wrote:
>
> I see, there’s no mp3 in the videos.
> So, after downloading both the video and the m4a extract, as you did,
> did you notice any indication of quality loss by chance? Namely, low
> quality or volume loss in both files’ audio… Remember I got lower
> volume when downloading on the other rig, but didn’t when doing with my
> rig…
No, I did not.
Unfortunately, my current loudspeakers appear to have sand inside, so
that they produce a gritting sound that makes listening to soft
classical music a sore pain. Something must have become loose inside,
needs cleaning perhaps, but these modern things can not be disassembled,
no screws… :-/
> Is it m4a, dash, or aac? I got confused…
Me too
All of it, actually.
Ok, the file extension is “.m4a”. It is classified by youtube as “DASH
audio, audio@128k”, which is a dynamic protocol, as I mentioned (read
the wikipedia link I posted, it explains it). And the “mediainfo”
program said that it was encoded as “aac”, aka “Advanced Audio Codec”.
I’m not familiar with it.
You could say that it is an m4a container with an aac stream. m4a seems
to be another name for mpeg4, maybe used to indicate “audio only”.
Mmm… the wikipedia seems to confirm some of it:
http://en.wikipedia.org/wiki/MPEG-4_Part_14
It could be worse… “.m4p” has drm.
…m4b indicates audio book…
…m4r is used by the iphone for ring tones…
There are a few variants!
LOL. The wikipedia says that they use different names despite all being
the same thing because Windows needs different extensions to know what
to use to handle them - the format is itself a container that can
actually be many different things, or contain several things (like
video, audio, subtittles…)
> Also, tried looking if I had “man” pages for youtube-dl, cclive, or
> mediainfo. Nothing. Guess I’d have to install them…
Of course ;.)
I think I got them from packman.
> Talking about it, how are these tools? What could you say about them?
> Got a bit curious…
Well, basically they are the same thing as the “flash video downloader”
plugin in Firefox, only that CLI, that is, a command you type on the
terminal. If the plugin works for you, use it, it is easier. The “flash
video downloader” does about the same thing with clicks, and it gives
you the same download types.
I use the CLI things because I want to reduce the download speed. My
router behaves badly if my internet pipe is used by one of these
downloads, and anything else in the entire house starts failing:
actually, it is DNS which fails, which makes everything else fail as a
consequence (ie, sites not found for email, whatsup in the phone, etc).
As my ADSL is just 1 Mbit/s, any video download can take long. Hours if
I queue a few.
And the plugin does not have an option to limit the download speed. Or
actually, FF does not have it. So I had to seek for alternatives…
–
Cheers / Saludos,
Carlos E. R.
(from 13.1 x86_64 “Bottle” at Telcontar)