[FFmpeg-user] sntsc

[Andrew Randrianasulu]

чт, 28 дек. 2023 г., 08:54 Kieran O Leary <kieran.o.leary at gmail.com>:

> Hi Mark
>
> On Wed 27 Dec 2023 at 08:53, Mark Filipak <markfilipak.trash at gmail.com>
> wrote:
>
> > On 12/27/23 01:58, Kieran O Leary wrote:
> > > On Tue 26 Dec 2023 at 22:53, Mark Filipak <markfilipak.imdb at gmail.com>
> > >> Oh, no! Mister Billipedia!  Hahahaha... (where people who are as ill
> > >> informed as you are, get to
> > >> pontificate)
>


Well, we (cinelerra-gg users/hackers/maintainers) run into aspect ratio
issues too , and I tried to demistify it for myself ... only to run into
much more complex explanation at

https://lurkertech.com/lg/pixelaspect/

Thing is, I was confused by lack of st->sample_aspect_ratio for HDV
sources, but

av_guess_sample_aspect_ratio() guessed SAR correctly anyway.

So in our "info" window I added two sar/dar pairs conditionally - one
guessed and one detected (as in libavformat/dump.c).

if (st->sample_aspect_ratio.num  &&
               av_cmp_q(st->sample_aspect_ratio,
st->codecpar->sample_aspect_ratio))



> >
> > >
> > > I think you must have misread the tone of Devin’s email, and I would
> > hardly
> > > call him ill informed. His post was constructive and your language will
> > > only derail threads like this.
> >
> > Oh, I did not mean it like that. I meant the general 'you' as in 'you,
> the
> > reader', as in 'people
> > who are as ill informed as _they_ are'. I sincerely didn't mean Devon.
>
>
> I re-read your post and I did indeed misread it. I understand what you mean
> now!
> Thanks for clarifying,
>
> Kieran.
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