On Friday, February 14, 2014, Tim Walker <[email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote:
> On 14 Feb 2014, at 06:01, Vittorio Giovara <[email protected]> > wrote: > > > --- > > Turning off the lowpass filter while interlacing is a terrible idea > > as it can easily gernerate terrible results; the effect would be > > similar to decimating vertically by dropping the odd lines. > > If lowpass is enabled by default, do we really need to remove the option? > > Do we know why someone bothered to add the option in the first place? I believe the option to turn the filter off was added because av_image_copy_plane is faster. However turning the filter off produces inherently wrong results (ie it does not "interlace" but just copies odd or even lines from alternate frames) so I think it's better to drop the option altogether. Vittorio > > Tim > _______________________________________________ > libav-devel mailing list > [email protected] > https://lists.libav.org/mailman/listinfo/libav-devel > _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
