[MPlayer-dev-eng] Re: [PATCH] VFCTRL_PERIODIC_UPDATE

[Diego Biurrun]

On Tue, Jan 23, 2007 at 11:11:15AM +0100, Benjamin Zores wrote:
> On 1/23/07, Diego Biurrun <diego at biurrun.de> wrote:
> >On Mon, Jan 22, 2007 at 03:14:23PM -0500, Jason Tackaberry wrote:
> >> On Mon, 2007-01-22 at 21:25 +0200, Uoti Urpala wrote:
> >> > A vo extension to allow editing the currently visible frame, 
> >implemented
> >> > at least for xv, might be the most practical way.
> >>
> >> The way I did this for xine was to create a special vo driver that
> >> blended the overlay before handing off the frame to the real vo driver.
> >> The reason I did it this way was because xine has no notion of
> >> unbuffered post plugins, so if implemented as a post plugin (i.e. vf) it
> >> would be several (up to 10 or so) frames behind.
> >>
> >> Perhaps this approach may also work here, and has the added benefit of
> >> being vo-agnostic.  So we have a special overlay vo that passes through
> >> to the real vo driver after blending the overlay.  And if the overlay is
> >> off, it will use DR and/or slices if possible (supported by the target
> >> vo).  So something like -vo
> >> overlay:shmkey=12345678:passthrough=xv:port=79
> >
> >Check out vo_xover.  IIRC it does something similar.
> 
> This is Xv specific.

vo_xover is not Xv-specific.

Diego