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updated documentation for detc,ivtc,pullup

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12340 b3059339-0415-0410-9bf9-f77b7e298cf2
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rfelker 2004-04-28 04:55:04 +00:00
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DOCS/man/en/mplayer.1
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@ -3028,11 +3028,17 @@ field (depending on whether n is even or odd).
.B detc[=var1=value2:var2=value2:...]
Attempts to reverse the 'telecine' process to recover a clean,
non-interlaced stream at film framerate.
This filter is still experimental but seems to be usable.
Please be aware that there is absolutely no use in this filter
unless you see interlacing when playing the movie!
This was the first and most primitive inverse telecine filter to be
added to MPlayer/MEncoder.
It works by latching onto the telecine 3:2 pattern and following it as
long as possible.
This makes it suitable for perfectly-telecined material, even in the
presence of a fair degree of noise, but it will fail in the presence
of complex post-telecine edits.
Development on this filter is no longer taking place, as ivtc, pullup,
and filmdint are better for most applications.
The following arguments (see syntax above) may be used to control
its behavior:
detc's behavior:
.RSs
.IPs dr
Set the frame dropping mode.
@ -3041,7 +3047,7 @@ Set the frame dropping mode.
merges in the past 5 frames.
2 means always maintain exact 5:4 input to output frame ratio.
.I NOTE:
Use mode 1 with MEncoder.
Use mode 1 or 2 with MEncoder.
.IPs am
Analysis mode.
Available values are 0 (fixed pattern with initial frame number
@ -3069,22 +3075,25 @@ The optional parameter (ivtc=1) corresponds to the dr=1 option for the
detc filter, and should be used with MEncoder but not with MPlayer.
As with detc, you must specify the correct output framerate (\-ofps
23.976) when using MEncoder.
Further development on ivtc has stopped, as the pullup and filmdint
filters appear to be much more accurate.
.TP
.B pullup\
Third-generation pulldown reversal (inverse telecine) filter,
capable of handling mixed hard-telecine, 24 fps progressive, and 30
fps progressive content.
The pullup filter is designed to be much more robust than detc or
ivtc, but it is still under development.
ivtc, by taking advantage of future context in making its decisions.
Like ivtc, pullup is stateless in the sense that it does not lock onto
a pattern to follow, but it instead looks forward to the following
fields in order to identify matches and rebuild progressive frames.
It is still under development, but believed to be quite accurate.
No configuration options are available yet.
As the underlying pulldown reversal engine is designed to take
advantage of the new features in MPlayer G2, the current
implementation in G1 is meant to serve mainly as a testbed.
.I NOTE:
Presently pullup lacks any way to cap the output framerate, so
during 30 fps progressive sequences or stills, it will output more
than 24 fps, meaning you'll have trouble if you use it with mencoder
\-ofps 23.976.
Always follow pullup with the softskip filter when encoding to ensure
that pullup is able to see each frame. Failure to do so will lead to
incorrect output and will usually crash, due to design limitations in
the codec/filter layer.
.TP
.B filmdint[=options]
Inverse telecine filter, similar to the pullup filter above.