On 15 Feb 2014, at 12:21, Vittorio Giovara <[email protected]> wrote:
> 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 Fair enough. Tim _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
