From e9d0d7bf9871b7e7fa8d154535cf0bbc7e7bd466 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 10 Dec 2012 22:20:39 +0000
Subject: Try to allow users to specify that the film's header should be
 trusted wrt length when building thumbnails, thus speeding up examine-content
 by a factor of 2-ish.

---
 src/lib/ffmpeg_decoder.cc | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/lib/ffmpeg_decoder.cc')

diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc
index ef9c05fa6..fd522a5ac 100644
--- a/src/lib/ffmpeg_decoder.cc
+++ b/src/lib/ffmpeg_decoder.cc
@@ -629,3 +629,9 @@ FFmpegAudioStream::to_string () const
 	return String::compose ("ffmpeg %1 %2 %3 %4", _id, _sample_rate, _channel_layout, _name);
 }
 
+/** @return Length (in video frames) according to our content's header */
+SourceFrame
+FFmpegDecoder::length () const
+{
+	return (double(_format_context->duration) / AV_TIME_BASE) * frames_per_second();
+}
-- 
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