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1 files changed, 4 insertions, 2 deletions
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 2867538860..e4c358c698 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -44,8 +44,6 @@ length.
All files must have the same streams (same codecs, same time base, etc.).
-This script format can currently not be probed, it must be specified explicitly.
-
@subsection Syntax
The script is a text file in extended-ASCII, with one directive per line.
@@ -62,6 +60,10 @@ backslash or single quotes.
Identify the script type and version. It also sets the @option{safe} option
to 1 if it was to its default -1.
+To make FFmpeg recognize the format automatically, this directive must
+appears exactly as is (no extra space or byte-order-mark) on the very first
+line of the script.
+
@end table
@subsection Options