[FFmpeg-user] sntsc

[Mark Filipak]

On 12/22/23 16:09, Devin Heitmueller wrote:
> On Fri, Dec 22, 2023 at 3:57 PM Mark Filipak <markfilipak.imdb at gmail.com> wrote:
>> On 12/22/23 15:14, Devin Heitmueller wrote:
>>> On Fri, Dec 22, 2023 at 2:38 PM Mark Filipak <markfilipak.imdb at gmail.com> wrote:
>>>> This page: https://ffmpeg.org/ffmpeg-utils.html
>>>> 'says' this:
>>>>
>>>> "The following abbreviations are recognized:
>>>> "‘sntsc’
>>>> "    640x480"
>>>>
>>>> What is it? I'm not aware that any such thing exists.
>>>
>>> It's NTSC with square pixels...
>>
>> How do you go from 720x480 to 640x480 without throwing away 80 pixels per line?
>> Normally, 720x480 decodes to 720x540.
-snip-
>
> Even worse, you can have 720x480 video with a display aspect ratio of
> 16:9 (i.e. standard definition widescreen).  In this case the pixel
> aspect ratio is going to be 40:33.

Huh? "720x480 video with a display aspect ratio of 16:9" is what's on most 'NTSC' DVDs. The PAR is 
32/27.