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doc: update libavfilter documentation

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Update the reference to the conversion tool to use avconv and
make sure the example line works as supposed.
Remove the paragraph pointing to the svn repo
This commit is contained in:
Luca Barbato 2011-11-08 11:37:58 -08:00
parent 371d15ec36
commit 299809defb
1 changed files with 3 additions and 16 deletions
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19
doc/libavfilter.texi
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@ -14,18 +14,6 @@
Libavfilter is the filtering API of Libav. It is the substitute of the
now deprecated 'vhooks' and started as a Google Summer of Code project.
Integrating libavfilter into the main Libav repository is a work in
progress. If you wish to try the unfinished development code of
libavfilter then check it out from the libavfilter repository into
some directory of your choice by:
@example
svn checkout svn://svn.libav.org/soc/libavfilter
@end example
And then read the README file in the top directory to learn how to
integrate it into ffmpeg and avplay.
But note that there may still be serious bugs in the code and its API
and ABI should not be considered stable yet!
@ -48,15 +36,14 @@ and the vflip filter before merging it back with the other stream by
overlaying it on top. You can use the following command to achieve this:
@example
./ffmpeg -i in.avi -s 240x320 -vf "[in] split [T1], fifo, [T2] overlay= 0:240 [out]; [T1] fifo, crop=0:0:-1:240, vflip [T2]
./avconv -i input -vf "[in] split [T1], fifo, [T2] overlay=0:H/2 [out]; [T1] fifo, crop=iw:ih/2:0:ih/2, vflip [T2]" output
@end example
where input_video.avi has a vertical resolution of 480 pixels. The
result will be that in output the top half of the video is mirrored
The result will be that in output the top half of the video is mirrored
onto the bottom half.
Video filters are loaded using the @var{-vf} option passed to
ffmpeg or to avplay. Filters in the same linear chain are separated by
avconv or to avplay. Filters in the same linear chain are separated by
commas. In our example, @var{split, fifo, overlay} are in one linear
chain, and @var{fifo, crop, vflip} are in another. The points where
the linear chains join are labeled by names enclosed in square