Bernhard Praschinger wrote:
There is as well yuvmotionfps which is not included in Jerome's Yuvtools.
How different is yuvmotionfps to the current version of yuvfps with the
weighted average of two temporally closest input frames/fields that is
aviable ?
Having quickly checked out yuvmotionfps I would say it is quite
different (more sophisticated) compared to yuvfps. The weighted average
resampling code currently in yuvfps (-w option) just blends the two
frames/fields together causing moving objects to become blurred and more
or less hides the jumps from the eye. Yuvmotionfps interpolates the
actual motion and it includes some scene change detection support as well.
I compared yuvmotionfps to yuvfps by converting some 30 fps progressive
material to 25 fps. With small search path radius yuvmotionfps produced
very accurate results and few artifacts for slow moving objects and for
faster motion it falled back to interpolating pixel values (producing
output quite similar to yuvfps -w). With larger search path radius it
was able to interpolate faster motion as well but it becomes much slower
and produces more artifacts.
I was surprised to find out how fast yuvmotionfps is (yuvmotionfps with
the default settings was less than 6 times slower compared to yuvfps
-w). Personally, I need to test it more to say whether I like
yuvmotionfps output more than yuvfps -w output but it definitely is
different. One thing I noticed is that faces of moving people are much
"easier" to look at in yuvmotionfps output (because they are not
continuously going from blurred to sharp to blurred like with yuvfps -w).
--
Johannes Lehtinen <[EMAIL PROTECTED]>, http://www.iki.fi/jle/
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