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.

1 files changed, 6 insertions, 0 deletions

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();
+}