On 09/30/2020 06:08 PM, Jim DeLaHunt wrote:
On 2020-09-30 13:09, Mark Filipak (ffmpeg) wrote:
I seek your comments regarding the following glossary entries (that have been reformatted to fit
email). Kindly take your time.
-Mark.
DAR (display aspect ratio [1]) [noun]: 1, … as a minimized, H:V, integer ratio
(e.g.
16:9, 4:3)…
(and similar wording for PAR and SAR):
Is the term "minimized aspect ratio" already used in this domain? If not, then the related
mathematics term "reduced fraction" may be a better inspiration than "minimized".
Excellent! I'll go for it.
SAR [noun]:…
[2] A standardized set of picture sizes & aspects has been
established:
display DAR picture PAR SAR = DAR/PAR
16:9-2160: 3840 x 2160 16:9 : 3840 x 2160 16:9 : 1:1
4:3-2160: 2880 x 2160 4:3 : 2880 x 2160 4:3 : 1:1
16:9-1080: 1920 x 1080 16:9 : 1920 x 1080 16:9 : 1:1
4:3-1080: 1440 x 1080 4:3 : 1440 x 1080 4:3 : 1:1
16:9-576: 1024 x 576 16:9 : 720 x 576 5:4 : 64:45
4:3-576: 768 x 576 4:3 : 720 x 576 5:4 : 16:15
16:9-480: 853 x 480 16:9 : 720 x 480 3:2 : 32:27
4:3-480: 640 x 480 4:3 : 720 x 480 3:2 : 8:9 [3]
The formatting of the email garbles the table [2] enough that I can't be sure what I'm reading.
Maybe insert printable delimiters into each line?
Hmmm... It's a table: rows and columns, like a spread sheet. Does making the column headers more
obvious work better?
display DAR picture PAR SAR = DAR/PAR
=========== ==== =========== ==== =====
16:9-2160: 3840 x 2160 16:9 : 3840 x 2160 16:9 : 1:1
4:3-2160: 2880 x 2160 4:3 : 2880 x 2160 4:3 : 1:1
16:9-1080: 1920 x 1080 16:9 : 1920 x 1080 16:9 : 1:1
4:3-1080: 1440 x 1080 4:3 : 1440 x 1080 4:3 : 1:1
16:9-576: 1024 x 576 16:9 : 720 x 576 5:4 : 64:45
4:3-576: 768 x 576 4:3 : 720 x 576 5:4 : 16:15
16:9-480: 853 x 480 16:9 : 720 x 480 3:2 : 32:27
4:3-480: 640 x 480 4:3 : 720 x 480 3:2 : 8:9 [3]
Or is it the column centering that doesn't work?
--
What would you do if you woke up in a police state?
African-Americans wake up in a police state every day.
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