[FFmpeg-devel] [PATCH] Removed -padtop,right,bottom,left,color options; added comments to ffmpeg doc
Tue Jul 6 17:54:57 CEST 2010
Stefano Sabatini wrote:
> On date Sunday 2010-07-04 15:16:47 -0700, Howard Chu encoded:
>> 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.
Can you point me to the scale filter patch you're talking about?
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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