From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 5/5] avformat: add sdr support
Date: Sat, 17 Jun 2023 20:37:23 +0200
Message-ID: <20230617183723.GP1391451@pb2> (raw)
In-Reply-To: <CAPYw7P51J++LUXKiRRMgsqCB+YjCdc_xk+Aq7VniGGBaMOHgxA@mail.gmail.com>
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On Sat, Jun 17, 2023 at 08:08:11PM +0200, Paul B Mahol wrote:
[...]
> Which library handles compressed stuff?
For digital stuff like DAB/DVB/...
sdrdemux in libavformat will demodulate, do error correction then return AVPacket
with H.264 / Mpeg2 video or AAC or wahetever
That then will get passed to libavcodec, same as with any other demuxer.
This code is not written yet. There is just analog AM demodulation. I posted
this patch as soon as the first usecase worked
usecase was "listen to random AM radio stations in ffplay" :)
and it can also grab all AM stations in a 10Mhz window and demodulate all
(that 10mhz is what my hw and usb bandwidth can do max)
I intend to add FM demodulation, because it seems a fun thing to try to do.
someone will need to add DAB/DVB support, I would be happy if someone else
comes forth to do that. If noone does ill think about if i want to do it
or not once FM is done and once this is in git.
The initial reaction from some was a bit spicy, so i need to think
how much fun this is in FFmpeg.
But one thing i can say for sure, is, if i cannot use this in ffplay
then it makes no sense for me to put more time into it
We could implement seeking to next/previous stations differently but
it seems a bit like creating extra work for everyone.
I mean a new API in sdrdemux then ffplay needs to support that and then
other players would need to support it and so on. While really the
seeking on a realtime input has no other use
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Democracy is the form of government in which you can choose your dictator
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next prev parent reply other threads:[~2023-06-17 18:37 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-16 22:20 [FFmpeg-devel] [PATCH 0/5] " Michael Niedermayer
2023-06-16 22:20 ` [FFmpeg-devel] [PATCH 1/5] avutil/tx_template: extend to 2M Michael Niedermayer
2023-07-22 15:40 ` Michael Niedermayer
2023-07-23 17:48 ` Tomas Härdin
2023-07-24 8:59 ` Michael Niedermayer
2023-07-24 11:06 ` Leo Izen
2023-07-24 12:39 ` Thilo Borgmann
2023-07-24 13:04 ` Rémi Denis-Courmont
2023-07-24 15:45 ` Thilo Borgmann
2023-07-24 8:35 ` Andreas Rheinhardt
2023-07-24 8:57 ` Paul B Mahol
2023-07-24 18:46 ` Tomas Härdin
2023-07-25 6:14 ` Paul B Mahol
2023-06-16 22:20 ` [FFmpeg-devel] [PATCH 2/5] avcodec/pcm: allow Changing parameters Michael Niedermayer
2023-06-16 22:20 ` [FFmpeg-devel] [PATCH 3/5] avcodec/kbdwin: Support arbitrary sized windows Michael Niedermayer
2023-06-16 22:20 ` [FFmpeg-devel] [PATCH 4/5] avcodec: Rename ff_kbd_window_init() as it will be needed from outside libavcodec Michael Niedermayer
2023-06-16 22:20 ` [FFmpeg-devel] [PATCH 5/5] avformat: add sdr support Michael Niedermayer
2023-06-17 6:16 ` Paul B Mahol
2023-06-17 8:46 ` Michael Niedermayer
2023-06-17 11:08 ` Paul B Mahol
2023-06-17 12:48 ` Michael Niedermayer
2023-06-17 18:08 ` Paul B Mahol
2023-06-17 18:37 ` Michael Niedermayer [this message]
2023-06-17 18:43 ` Michael Niedermayer
2023-06-18 11:46 ` Paul B Mahol
2023-06-18 12:36 ` Kieran Kunhya
2023-06-24 10:22 ` Tomas Härdin
2023-06-18 12:59 ` Lynne
2023-06-18 13:30 ` Hendrik Leppkes
2023-06-18 13:45 ` Lynne
2023-06-18 13:48 ` Michael Niedermayer
2023-06-17 13:30 ` Leo Izen
2023-06-17 18:10 ` Michael Niedermayer
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