added notes about using ffmpeg with the redact filters

README.txt

@@ -36,3 +36,12 @@ sources of inspiration
 https://github.com/mconf/android-ffmpeg
 https://github.com/halfninja/android-ffmpeg-x264
 https://github.com/guardianproject/SSCVideoProto
+http://wiki.multimedia.cx/index.php?title=FFmpeg_filter_howto
+
+
+testing
+-------
+
+./ffmpeg -f lavfi -i "movie=midr-mjpeg.mov,redact=redact_unsort.txt" -f lavfi -i "amovie=midr-mjpeg.mov,aredact=aredact_unsort.txt" -acodec copy -vcodec copy -y /tmp/output.mov
+
+./ffmpeg -f lavfi -i "movie=../testfiles/sscvideoproto_nexuss_high_quality_2_3_3.mp4,redact=redact_unsort.txt" -f lavfi -i "amovie=../testfiles/sscvideoproto_nexuss_high_quality_2_3_3.mp4,aredact=aredact_unsort.txt" -acodec copy -vcodec libx264 -b:v 1000k -an -f mp4 -y /tmp/output.mp4