[MPlayer-users] Question about crop, scale, aspect ratio, multiple of 16

Kichigai Mentat kichigai at comcast.net
Sun Dec 19 04:33:22 CET 2004

On Dec 18, 2004, at 13.47, D Richard Felker III wrote:

> On Fri, Dec 17, 2004 at 01:50:12AM -0800, RC wrote:
>> On Thu, 16 Dec 2004 20:48:26 +0100
>> nick <nick.rienties at home.nl> wrote:
>>> Is it a problem that 428 is not a multiple of 16?
>> Your final dimentions, before encoding, need to be multiples of 16...
>> You can use any values for crop, if you are planning on scaling (or
>> expanding, or whatever) to dimentions that are multiples of
>> 16, afterwards.
> not any. they must be multiples of 2, and if the content is
> interlaced/telecined at the time you crop, the vertical crop offset
> and size must be multiples of 4!
> rich
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> MPlayer-users at mplayerhq.hu
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Actually, you can set the crop to any size. MEncoder will fix it by 
setting it to the proper size for you. I did this when cropping footage 
that came out to some number like 415, and it blew it up to 416 
automatically. So this isn't something to really worry about.

What I don't know is that if MEncoder just stretches the output to fill 
that extra pixel or so, or just adds black space.

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	Cat underfoot? Tape it to the ceiling.
Duct Tape Tip No. 131:
	Dog underfoot? Tape it to the ceiling.
Duct Tape Tip No. 132:
	Kids underfoot?
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