[MPlayer-users] -vf softpulldown seems slow <:/

D Richard Felker III dalias at aerifal.cx
Sun Apr 11 19:13:09 CEST 2004

On Sun, Apr 11, 2004 at 12:26:58AM +0100, Bruno wrote:
> Hi,
> I've been testing MPEG-2 reencoding directly from VOB sources in a 
> PIII-500.
> With my settings I can achieve up to 15 fps on PAL sources, but only 7 fps 
> on NTSC.
> This has been tested with both Cygwin and MinGW recent compiles, all of 
> them compiled with runtime CPU detection.
> The main difference between my PAL and NTSC compiles (DVD reencoding, no 
> rescaling) is:
> PAL: keyint=15
> NTSC: keyint=18 and vf=softpulldown
> Since all that softpulldown does is look at the MPEG-2 RFF flags and copy 
> a field I can't understand this performance issue. Any ideas?

This totally makes sense. Copying full DVD size frames is SLOW, and of
course you're also ENCODING 25% more frames, and having to encode them
in interlaced mode (ilme,ildct) which is much slower (if you're not
using interlaced mode, the quality will come out horrible)!


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