mirror of https://github.com/mpv-player/mpv
better vf_ditc description by Ville Saari <114263 - @ - vs - . - iki - . - fi>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15681 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -5099,22 +5099,33 @@ using a method that keeps one field and interpolates the other, the result is
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a juddering video that has every fourth frame duplicated.
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This filter is intended to find and drop those duplicates and restore the
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original film framerate.
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When using this filter, you must specify \-ofps that is 4/\:5 of the fps of the
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input file (24000/1001 if the input is 30000/1001 fps).
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When using this filter, you must specify \-ofps that is 4/\:5 of
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the fps of the input file and place the softskip later in the
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filter chain to make sure that divtc sees all the frames.
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Two different modes are available:
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One pass mode is the default and is straightforward to use,
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but has the disadvantage that any changes in the telecine
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phase (lost frames or bad edits) cause momentary judder
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until the filter can resync again.
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Two pass mode avoids this by analyzing the whole video
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beforehand so it will have forward knowledge about the
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phase changes and can resync at the exact spot.
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These passes do
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.B not
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correspond to pass one and two of the encoding process.
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You must run an extra pass using divtc pass one before the
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actual encoding throwing the resulting video away.
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Use \-nosound \-ovc raw \-o /dev/null to avoid
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wasting CPU power for this pass.
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You may add something like crop=2:2:0:0 after divtc
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to speed things up even more.
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Then use divtc pass two for the actual encoding.
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If you use multiple encoder passes, use divtc
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pass two for all of them.
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The options are:
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.RSs
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.IPs pass=1|2
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Use two pass mode.
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This produces best results.
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Pass one analyzes the video and writes the results to a log file.
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Pass two then reads this log file and uses the information to do
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the actual work.
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Note that these passes do
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.B not
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correspond to pass one and two of the encoding process.
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In order to use divtc two pass with two pass video encoding, you must perform
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three passes: first divtc pass one and encoder pass one, then divtc pass two
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and encoder pass one, and finally divtc pass two and encoder pass two.
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.IPs file=<filename>
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Set the two pass log filename (default: "framediff.log").
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.IPs threshold=<value>
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