On date Wednesday 2015-10-07 15:03:32 +0200, Jean Delvare encoded: > The original interpolation algorithm behaved poorly on the borders and > did not even guarantee continuity at the borders. For this reason, a > second interpolation/blending pass was required on the borders to make > them seamless. > > However, since the interpolation algorithm was improved in June 2013, > the border issues no longer exist. The new algorithm does guarantee > continuity at the borders, making the second pass useless. A larger > band always increases the cumulated interpolation error. In most cases > it also increases the average interpolation error, even though the > samples in the band are only partially interpolated. > > For this reason I would like to get rid of the "band" parameter. As a > first step, let's change its default value from 4 to 1 and document it > as deprecated. > > I have benchmarked this change on a combination of input sources and > realistic logo areas. Lowering the band value from 4 to 1 resulted in > 8 to 39 % less interpolation error per frame (or 1 to 34 % less > interpolation error per luma sample.) > > Signed-off-by: Jean Delvare <jdelv...@suse.de> > --- > Changes since v1: > * Added #ifs so that the deprecated options are dropped automatically > on next major version of libavfilter (suggested by Stefano Sabatini) > > doc/filters.texi | 4 +++- > libavfilter/vf_delogo.c | 17 +++++++++++++++-- > 2 files changed, 18 insertions(+), 3 deletions(-)
Thanks, applied. -- FFmpeg = Funny and Faithless Mystic Prodigious Easy Gem _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
