VSE: Fix audaspace not reading ffmpeg files with start offset correctly

The duration and start time for audio strips were not correctly read in
audaspace.

Some video files have a "lead in" section of audio that plays before the
video starts playing back. Before this patch, we would play this lead in
audio at the same time as the video started and thus the audio would not
be in sync anymore.

Now the lead in audio is cut off and the duration should be correctly
calculated with this in mind.

If the audio starts after the video, the audio strip is shifted to
account for this, but it will also lead to cut off audio which might not
be wanted. However we don't have a simple way to solve this at this
point.

Differential Revision: http://developer.blender.org/D11917

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/sequencer/intern/strip_time.c b/source/blender/sequencer/intern/strip_time.c
index 68128690773..b73ac631693 100644
--- a/source/blender/sequencer/intern/strip_time.c
+++ b/source/blender/sequencer/intern/strip_time.c
@@ -34,6 +34,7 @@
 #include "BKE_scene.h"
 #include "BKE_sound.h"
 
+#include "DNA_sound_types.h"
 #include "IMB_imbuf.h"
 
 #include "SEQ_iterator.h"
@@ -134,7 +135,8 @@ static void seq_update_sound_bounds_recursive_impl(Scene *scene,
                                    seq->scene_sound,
                                    seq->start + startofs,
                                    seq->start + seq->len - endofs,
-                                   startofs + seq->anim_startofs);
+                                   startofs + seq->anim_startofs,
+                                   seq->sound->offset_time);
       }
     }
   }