diff --git a/doc/faq.texi b/doc/faq.texi
index fd44934402..ba67d634f9 100644
--- a/doc/faq.texi
+++ b/doc/faq.texi
@@ -194,6 +194,23 @@ CAVLC
 ffmpeg -i input -acodec aac -ab 128 -vcodec h264 -b 1200 -ar 48000 -mbd 2 -coder 1 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp -flags loop -trellis 2 -partitions parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 output.mp4
 @end table
 
+@section How could I read DirectShow files?
+
+If you have built FFmpeg with @code{./configure --enable-avisynth} (only possible in MinGW/Cygwin platforms)
+then you may use as input any file that DirectShow reads.
+(Be aware that this feature has just been added, so you will need to support yourself for any query)
+
+Just create an "input.avs" text file with this single line ...
+@example
+  DirectShowSource("C:\path to your file\yourfile.asf")
+@end example
+... and then feed that text file to ffmpeg:
+@example
+  ffmpeg -i input.avs
+@end example
+
+For ANY other help on Avisynth, please visit @url{http://www.avisynth.org/}.
+
 @chapter Development
 
 @section When will the next FFmpeg version be released? / Why are FFmpeg releases so few and far between?