X-Git-Url: https://git.piment-noir.org/?p=deb_ffmpeg.git;a=blobdiff_plain;f=ffmpeg%2Fdoc%2Fwriting_filters.txt;h=eb16d424806a8ef21dc5bfb67cfd6c51ee8fa52d;hp=c7923e884f02dcee12d0e06821a5e6e5acf61193;hb=f6fa7814ccfe3e76514b36cf04f5cd3cb657c8cf;hpb=2ba45a602cbfa7b771effba9b11bb4245c21bc00

diff --git a/ffmpeg/doc/writing_filters.txt b/ffmpeg/doc/writing_filters.txt
index c7923e8..eb16d42 100644
--- a/ffmpeg/doc/writing_filters.txt
+++ b/ffmpeg/doc/writing_filters.txt
@@ -16,16 +16,15 @@ outputs the modified frame. The most simple way of doing this is to take a
 similar filter.  We'll pick edgedetect, but any other should do. You can look
 for others using the `./ffmpeg -v 0 -filters|grep ' V->V '` command.
 
- - cp libavfilter/vf_{edgedetect,foobar}.c
- - sed -i s/edgedetect/foobar/g -i libavfilter/vf_foobar.c
- - sed -i s/EdgeDetect/Foobar/g -i libavfilter/vf_foobar.c
+ - sed 's/edgedetect/foobar/g;s/EdgeDetect/Foobar/g' libavfilter/vf_edgedetect.c > libavfilter/vf_foobar.c
  - edit libavfilter/Makefile, and add an entry for "foobar" following the
    pattern of the other filters.
  - edit libavfilter/allfilters.c, and add an entry for "foobar" following the
    pattern of the other filters.
  - ./configure ...
  - make -j<whatever> ffmpeg
- - ./ffmpeg -i tests/lena.pnm -vf foobar foobar.png
+ - ./ffmpeg -i http://samples.ffmpeg.org/image-samples/lena.pnm -vf foobar foobar.png
+   Note here: you can obviously use a random local image instead of a remote URL.
 
 If everything went right, you should get a foobar.png with Lena edge-detected.