[MPlayer-dev-eng] [PATCH] A new ASS renderer

[Xidorn Quan]

On Mon, Sep 24, 2012 at 12:53 AM, wm4 <nfxjfg at googlemail.com> wrote:

> On Mon, 24 Sep 2012 00:31:54 +0800
> Xidorn Quan <quanxunzhen at gmail.com> wrote:
>
> > > And again, most time is spent in libass, not uploading or rendering
> > > the sub-images. Or does anyone have different experiences? I'd like
> > > to hear of it. Maybe I'm missing something.
> > >
> >
> > Partially true. If subtitle is changed every frame, most time is
> > spent in libass, but if not, more time may need to be spent in
> > rendering subimages over and over again.
>
> Good argument. But in my opinion the static, non-changing case happens
> mostly with small and simple subtitles, in which case rendering is
> relatively fast anyway.
>

You are right, but it can just do better even if it has been
relatively fast.


> Maybe trying to update rectangular regions instead of horizontal bands
> would bring the same performance gain for vf_ass? I'm just guessing and
> bikeshedding here, though.
>