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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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diego 2005-06-07 09:12:56 +00:00
parent 58d1444a79
commit 33b529aff1
1 changed files with 23 additions and 12 deletions
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DOCS/man/en/mplayer.1
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@ -5099,22 +5099,33 @@ using a method that keeps one field and interpolates the other, the result is
a juddering video that has every fourth frame duplicated.
This filter is intended to find and drop those duplicates and restore the
original film framerate.
When using this filter, you must specify \-ofps that is 4/\:5 of the fps of the
input file (24000/1001 if the input is 30000/1001 fps).
When using this filter, you must specify \-ofps that is 4/\:5 of
the fps of the input file and place the softskip later in the
filter chain to make sure that divtc sees all the frames.
Two different modes are available:
One pass mode is the default and is straightforward to use,
but has the disadvantage that any changes in the telecine
phase (lost frames or bad edits) cause momentary judder
until the filter can resync again.
Two pass mode avoids this by analyzing the whole video
beforehand so it will have forward knowledge about the
phase changes and can resync at the exact spot.
These passes do
.B not
correspond to pass one and two of the encoding process.
You must run an extra pass using divtc pass one before the
actual encoding throwing the resulting video away.
Use \-nosound \-ovc raw \-o /dev/null to avoid
wasting CPU power for this pass.
You may add something like crop=2:2:0:0 after divtc
to speed things up even more.
Then use divtc pass two for the actual encoding.
If you use multiple encoder passes, use divtc
pass two for all of them.
The options are:
.RSs
.IPs pass=1|2
Use two pass mode.
This produces best results.
Pass one analyzes the video and writes the results to a log file.
Pass two then reads this log file and uses the information to do
the actual work.
Note that these passes do
.B not
correspond to pass one and two of the encoding process.
In order to use divtc two pass with two pass video encoding, you must perform
three passes: first divtc pass one and encoder pass one, then divtc pass two
and encoder pass one, and finally divtc pass two and encoder pass two.
.IPs file=<filename>
Set the two pass log filename (default: "framediff.log").
.IPs threshold=<value>