For me, scalers are only an occasional diversion from my daily grind
For what it's worth, a 'blur factor' option is on my list of things to
add to y4mscaler; I imagine it would simply scale the size of the kernel
to lower the spatial cut-off frequency.
Right
> You hit the nail on the head on this one. I build scalers
> (and hence pre and reconstruction filters) for my job. Quite
> apart from my normal struggle just to halfways find time to
> properly develop mpeg2enc this means that I can't easily do
> this for the proj
--reduce-hf doesn't actually throw away the higher frequency DCT bins.
What it does is simply increase their quantisation (which of course means
more low-amplitude ones get 0-ed).
Is it easy to make the amount of the increase and the transition
adjustable? To give yet ano
Hi Andrew -
> quantisation matrix for each DCT that you can specify in each picture
> coding sequence. However, a well-known trick is to selectively 0
> isolated bins (they have a high coding overhead) you think won't reduced SNR
Is this the "single coefficient elimination" that is use
Hi Dan,
> I think extent of the ringing artifacts depend on the source images
> being encoded. If the spatial bandwidth of the signal hitting
> mpeg2enc has already been limited (by camera optics, preprocessing,
> etc) then at higher spatial frequencies the spectrum will already roll
> off, and w
