[FFmpeg-devel] [PATCH 5/6] fftools: avradio support

[Michael Niedermayer]

On Wed, Aug 02, 2023 at 03:00:54PM +0200, Paul B Mahol wrote:
> On Wed, Aug 2, 2023 at 2:47 PM Michael Niedermayer <michael at niedermayer.cc>
> wrote:
> 
> > On Tue, Aug 01, 2023 at 10:06:19PM +0200, Paul B Mahol wrote:
> > > On Tue, Aug 1, 2023 at 9:51 PM Cosmin Stejerean <cosmin at cosmin.at>
> > wrote:
> > >
> > > > On Jul 27, 2023, at 11:36 AM, Michael Niedermayer <
> > michael at niedermayer.cc>
> > > > wrote:
> > > >
> > > > Let me first explain what i want to provide to the user (most of this
> > > > is already implemented, some needs more work)
> > > > the user starts her favorite player, be that vlc, ffplay, or whatever
> > > > chooses sdr as input device and thats all configuration she needs.
> > > > She can select a specific driver, gain and so but she doesnt have to
> > > > Now she only needs 2 buttons, seek forward and seek backward, in
> > > > ffplay thats the cursor keys. To select the station.
> > > > And she sees on the screen what station that is, what song title and
> > > > artist are playing as well as what is playing on any other FM station
> > > > in view (that works here already in europe, for the US if it doesnt
> > work
> > > >
> > > > i need a sample from dumpurl ...)
> > > > (for non interactive tools like ffmpeg she would have to select the
> > > > frequency she wants to listen to or all in view ...)
> > > >
> > > > Now gqrx needs me to manually enter the frequency, the modulation the
> > > > device, then it still doesnt work (first one has to know why from
> > multiple
> > > > rtlsdr lines some dont work) and once one is through this it still
> > > > doesnt work, all AGC methods dont work, i have to set the gain manually
> > > > for the station i want to listen to to have acceptable quality. I do
> > know
> > > > but at this point we lost likely 90% of users
> > > >
> > > > I know this is a contentious topic, but as a heavy user of ffmpeg for
> > both
> > > > work and fun, and as an amateur radio user, what you describe sounds
> > pretty
> > > > great to me. I can definitely imagine using this for a few usecases. I
> > get
> > > > that other tools exist and others that know how to use those can of
> > course
> > > > continue to use them. I for one would definitely love to use ffmpeg
> > > > directly if that was an option.
> > > >
> > > > This is not something I'd want enabled in the ffmpeg build at work due
> > to
> > > > the extra surface area, but assuming I can disable the sdr radio bits
> > at
> > > > build time for "serious" builds, and that this code is actively
> > maintained
> > > > and designed in a way that minimizes interference with other parts of
> > > > ffmpeg, then it's not clear to me why there's such a strong reaction
> > > > against having this included in ffmpeg.
> > > >
> > >
> > > Because it would always give sub-optimal results at best.
> >
> > Iam not sure what you refer to by "it" exactly and what the alternative
> > you compare it to are but why ?
> >
> > Even leaving this very generic, claiming one implementation will always
> > give "sub-optimal results" to another does not sound like a fact based
> > statment.
> >
> 
> Current SDR in current avradio is suboptimal. That is the fact.

Everything is suboptimal in some way

a boat is suboptimal in a dessert, and a camel in the middle of the sea

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Everything should be made as simple as possible, but not simpler.
-- Albert Einstein
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