Cropping, multiple of 16 and horizontal scaling
Cropping a 720 x 576 mpeg-2 video to 688 x 576 produces a 733 x 576 horizontal scaling.
From MPlayer: Movie-Aspect is 1.33:1 - prescaling to correct movie aspect. VO: [gl] 688x576 => 733x576 Planar YV12
Using the divisibility rule of 16 to get 720 to 688, to cut out those black bars, do I have to scale the 733 to a multiple of 16? MEncoder -sws 9 -vf crop=688:576:20 Can I leave it at the 733 x 576 horizontal scaling? It will only be played on monitors with square pixels; not rectangular pixels
Hi Bill, On Tue, May 03, 2016 at 19:56:57 +1000, Bill Crockett wrote:
Using the divisibility rule of 16 to get 720 to 688, to cut out those black bars, do I have to scale the 733 to a multiple of 16?
No, 733:576 is the display aspect ratio, applied by mplayer during playback. 688:576 is the storage aspect ratio, and that is the one where the "divisible by 16" rule applies.
It will only be played on monitors with square pixels; not rectangular pixels
That's something the player needs to solve, not the encoder. Moritz
participants (2)
-
Bill Crockett -
Moritz Barsnick