Hi Bobby Bingham wrote: > On Sun, 02 Mar 2008 15:00:34 +0100 > Vitor Sessak <[EMAIL PROTECTED]> wrote: >> Bobby Bingham wrote: >>> On Thu, 28 Feb 2008 00:18:59 +0100 (CET) >>> koorogi <[EMAIL PROTECTED]> wrote: >>> >>>> Author: koorogi >>>> Date: Thu Feb 28 00:18:58 2008 >>>> New Revision: 1932 >>>> >>>> Log: >>>> Slice support for vf_scale. >>>> >>>> >>>> Modified: >>>> libavfilter/vf_scale.c >>>> >> [...] >> >>> After some more testing, it seems this doesn't work right with >>> --enable-swscaler. I'll take a closer look at it later tonight. >> I was wondering one thing: imagine doing a 200x200 -> 400x400 linear >> interpolation resizing. >> >> The filter gets as input a (for ex.) 4x100 slice. It can then >> interpolate the line numbers (1,2,3,4,5,6,7) of the output. For the >> next slice, it would be able to output the lines >> (9,10,11,12,13,14,15). But to evaluate the output line 8, it'll need >> both the input line 4 and 5. So to do slice-based resizing, it would >> be necessary a complicated, resize algorithm dependent, caching. Also >> it would require some kind of memcpy. >> >> So my opinion is that implementing slices in resizing is hard and >> maybe not worth the effort. In the other hand, colospace conversion >> should be pretty simple. Or am I missing something? >> > > I believe that this caching is already implemented by libswscale.
Does imgresample.c also support this? -Vitor _______________________________________________ FFmpeg-soc mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc
