From: Nicolas George <nicolas.george@normalesup.org>
Date: Tue, 5 Mar 2013 16:14:27 +0000 (+0100)
Subject: lavf/concat: document the use of the files durations.
X-Git-Tag: android-x86-4.4-r1~5346
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=87a954d6f4e3cfbd533ac381e95df96683070397;p=android-x86%2Fexternal-ffmpeg.git

lavf/concat: document the use of the files durations.

Address trac ticket #2319.
---

diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index c8eec219e8..f9c86e76c7 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -44,6 +44,12 @@ length.
 
 All files must have the same streams (same codecs, same time base, etc.).
 
+The duration of each file is used to adjust the timestamps of the next file:
+if the duration is incorrect (because it was computed using the bit-rate or
+because the file is truncated, for example), it can cause artifacts. The
+@code{duration} directive can be used to override the duration stored in
+each file.
+
 @subsection Syntax
 
 The script is a text file in extended-ASCII, with one directive per line.