diff --git a/src/output/p_video.cpp b/src/output/p_video.cpp
index 8880ae29d..0212cfb14 100644
--- a/src/output/p_video.cpp
+++ b/src/output/p_video.cpp
@@ -94,6 +94,10 @@ video_packetizer_c::check_fourcc() {
                 "into a MP4 file with e.g. 'MP4Box' (use Google). Then "
                 "you can use mkvmerge and put the video into a Matroska "
                 "file.\n"
+                "If you're trying to get AVC/h.264 from an AVI into Matroska "
+                "then the commands you need to use are:\n"
+                " avi2raw avc.avi raw.264\n"
+                " mp4box -fps 23.976 -add raw.264 avc.mp4\n\n"
                 "If you really know what you are doing then you can force "
                 "mkvmerge to put this AVC/h.264 track into a Matroska file "
                 "even in VfW mode if you add '--engage allow_avc_in_vfw_mode' "