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document harddup and softskip
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12339 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -2896,6 +2896,25 @@ The optional argument selects the sampling mode.
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By default, linear interpolation (mode 1) is used.
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Mode 0 uses nearest-neighbor sampling, which is fast but incorrect.
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.TP
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.B harddup
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Only useful with MEncoder.
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If harddup is used when encoding, it will force duplicate frames to be
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encoded in the output.
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This uses slightly more space, but is necessary for output to MPEG
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files or if you plan to demux and remux the video stream after
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encoding.
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Should be placed at or near the end of the filter chain unless you
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have a good reason to do otherwise.
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.TP
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.B softskip
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Only useful with MEncoder.
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Softskip moves the frame skipping (dropping) step of encoding from
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before the filter chain to some point during the filter chain.
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This allows filters which need to see all frames (inverse telecine,
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temporal denoising, etc.) to function properly.
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Should be placed after the filters which need to see all frames and
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before any subsequent filters that are cpu-intensive.
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.TP
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.B decimate[=max:hi:lo:frac]
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Drops frames that don't differ greatly from the previous frame in
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order to reduce framerate.
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