[FFmpeg-devel] Fwd: patch for 44.1/32 khz pcm input in pcm dvd encoder

[Andrew Randrianasulu]

вт, 30 янв. 2024 г., 23:21 Marth64 <marth64 at proxyid.net>:

>  Interesting, thanks. My thought was to see if this is allowed for
> DVD-Video vs DVD-Audio only which are different application layer. I can
> try to run a PS2 test with the real hardware out of curiosity later.
>

Thanks!


I also found Cirrus Logic application note from 2001 that mentions 32khz
pcm operation. Yet it looks more like external amplifier/decoder part, not
something integrated into dvd player itself? (input stream via S/PDIF)

https://pdf.dzsc.com/88889/28162.pdf



> On Tue, Jan 30, 2024 at 2:17 PM Andrew Randrianasulu <
> randrianasulu at gmail.com> wrote:
>
> > пн, 29 янв. 2024 г., 22:08 Andrew Randrianasulu <randrianasulu at gmail.com
> >:
> >
> > > On Mon, Jan 29, 2024 at 8:16 PM Marth64 <marth64 at proxyid.net> wrote:
> > > >
> > > > Hi,  out of curiosity, I did not know 44.1/32 is supported on DVD
> PCM.
> > > Does
> > > > this type of output work on an actual DVD player?
> > >
> >
> >
> > At least this pdf brochure lists 44.1 under PCM:
> >
> >
> >
> https://at.yamaha.com/files/download/other_assets/8/333768/DVD-S1500_e_U.pdf
> >
> >
> > > We try to determinate this, but unfortunately new DVD  players a bit
> > > TOO flexible and forgiving?
> > >
> > > https://lists.cinelerra-gg.org/pipermail/cin/2024-January/007907.html
> > >
> > > I even had idea to use PS2 emulator to check (DVD video supposed to
> > > work there  since some  time)
> > > but ran into qt6 being  build  dependency ... so I shelved this idea
> for
> > > now
> > >
> > >
> > >
> > >
> > >  Thank you
> > > >
> > > > On Mon, Jan 22, 2024 at 3:59 AM Andrew Randrianasulu <
> > > > randrianasulu at gmail.com> wrote:
> > > >
> > > > > ---------- Forwarded message ---------
> > > > > От: Andrew Randrianasulu <randrianasulu at gmail.com>
> > > > > Date: вс, 21 янв. 2024 г., 06:49
> > > > > Subject: patch for 44.1/32 khz pcm input in pcm dvd encoder
> > > > > To: FFmpeg user questions <ffmpeg-user at ffmpeg.org>, Cinelerra.GG <
> > > > > cin at lists.cinelerra-gg.org>
> > > > >
> > > > >
> > > > > relative to ffmpeg.git commit
> > 6c4388b468bf92c0c1e7733c6cfe4ff3f9ca9723
> > > > >
> > > > > lightly tested with mpv and mediainfo like this:
> > > > >
> > > > > ./ffmpeg -i ~/f9518976.mp4 -target pal-dvd -ar 44100 -c:a pcm_dvd
> -f
> > > dvd
> > > > > t.mpg
> > > > >
> > > > > mpv plays sound correctly, mediainfo does not know those
> frequencies
> > > and
> > > > > display 0khz. ;)
> > > > >
> > > > >
> > > > > ====
> > > > >
> > > > > forwarded to ffmpeg-devel as requested.
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