[FFmpeg-devel] [PATCH] Removed -padtop,right,bottom,left,color options; added comments to ffmpeg doc

[Stefano Sabatini]

On date Sunday 2010-07-04 15:16:47 -0700, Howard Chu encoded:
> Stefano Sabatini wrote:
> >On date Sunday 2010-07-04 22:45:27 +0200, Michael Niedermayer encoded:
> >>On Sun, Jul 04, 2010 at 01:24:53PM +0200, Stefano Sabatini wrote:
> >>>On date Sunday 2010-07-04 12:53:34 +0200, Stefano Sabatini encoded:
> >>>[...]
> >>>>As for the pad, check attached. Another possibility would be to retain
> >>>>the -pad option entries, and state that they've been removed, but I
> >>>>prefer somehow this variant.
> >>>
> >>>Changed my mind again, should save some time to users updating their
> >>>ffmpeg and trying to figure out why their scripts fail. Anyway at some
> >>>point we'll have to remove both -pad* and -crop* options.
> 
> Along the lines of video geometry, I've been wanting to add an
> option to automatically rescale while preserving aspect ratio.
> Unless I missed something obvious, it doesn't appear like there's a
> simple option for this at present.
> 
> E.g., I want to rescale arbitrary videos to fit on the 480x320
> display of my phone. If I only specify the frame size, then videos
> are stretched/distorted to fit that size, losing the aspect ratio. I
> think I can force the aspect ratio so this doesn't happen, but that
> requires that I know the aspect ratio of the input in advance.
> 
> If I have a 4:3 512x384 video, I want it dropped down to e.g.
> 432x320. (Or something...) 16:9 512x288 -> 480x272. Something that's
> already small enough should pass thru unchanged, e.g. 416x224. So
> some kind of "shrink if needed" or "shrink to fit" option. Any
> suggestions on what to call this option?

This can be achieved making parametric the values for the scale and
pad filters.

This should be rather simple to implement (and there is already a
patch for the scale filter), patches for that are welcome.

Regards.
-- 
FFmpeg = Fierce and Fundamentalist Merciless Problematic Elfic Gadget