[MPlayer-dev-eng] [PATCH] try to enable XV_SYNC_TO_VBLANK

[Rich Felker]

On Mon, Jun 27, 2005 at 06:42:36PM -0400, Jason Tackaberry wrote:
> On Mon, 2005-06-27 at 10:23 -0400, Rich Felker wrote:
> > You cannot scale interlaced video, and MPlayer does not support
> > playback of interlaced video anyway. The only way you can make
> > something playable out of it is to encode to 60fps with vf_tfields.
> 
> How does interlaced or telecined anamorphic DVD content work?  720x480
> gets scaled to 854x480 which a settop DVD will have to scale down to fit

This is a misconception. There is no horizontal 'scaling'. But it's
aside from the point.

> on the TV, so the vertical resolution gets sampled down to probably
> around 400 lines.  I noticed this when I was ripping an Angel DVD, which
> is anamorphic widescreen, and has some interlaced parts.  (24 is also
> like this.)  It looks fine on my television, but I couldn't understand
> why. :)

You simply scale each field independently.

> About MPlayer not supporting playback of interlaced video: how does
> dfbmga work?  Can't other vo drivers get decent interlaced output using
> the same approach?

It doesn't work. Maybe it looks mostly right most of the time, but it
definitely does not "work".

Rich