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

[Michael Niedermayer]

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.

Thats a bit like saying a reverse engeneered codec will always give
sub optimal results to the binary original. And thats why we better
should go the optimal route


>
> Time to implement auto-pilot into FFmpeg too.

I dont know if you plan that but i dont, did not and have also not
suggested that. In fact i dont even know what exactly you refer to by
"auto-pilot"

thx

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

Into a blind darkness they enter who follow after the Ignorance,
they as if into a greater darkness enter who devote themselves
to the Knowledge alone. -- Isha Upanishad
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