[mythtv-users] aspect ratio of home video recordings in video library

[Jay Ashworth]

----- Original Message -----
> From: "Jeremy Jones" <jeremy.dwain.jones at gmail.com>

> both ffprobe and mediainfo report the DAR as 16:9 and the resolution
> as 720X480.
> 
> Just to see what would happen I ran the file through mkvmerge with the
> following command:
> mkvmerge -o test.mkv --aspect-ratio 0:'16/9' test.mpg
> 
> here is the resultant file:
> test.mkv <http://db.tt/oCOoeWYM>

This plays correctly in mplayer2, which says:

VIDEO:  720x480  29.970 fps  8900.0 kbps (1112.5 kB/s)
Aspect ratio is 1.78:1 - scaling to correct movie aspect.
VO: [xv] 720x480 => 853x480 Planar YV12  [fs]

That aspect should be 1.85:1 for 16:9, and 720x480 is actually D1 4:3 (or
very close*), with the expected 0.9:1 pixel aspect; it only becomes a
widescreen image aspect if you assume square pixels.

[* D-1 is actually 720x486 or 704x480 depending on whether you're talking
about the signal or image -- I believe that's the distinction, anyway]

Cheers,
-- jra
-- 
Jay R. Ashworth                  Baylink                       jra at baylink.com
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