From a4397fa911b79bd04f90e1a49dab5ef15226baab Mon Sep 17 00:00:00 2001
From: Baptiste Coudurier <baptiste.coudurier@gmail.com>
Date: Mon, 2 Feb 2009 10:41:43 +0000
Subject: [PATCH] fix temporal offet of ipbb sequences, simplification welcome
Originally committed as revision 16940 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavformat/mxfenc.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index eaaece35ddf..b615e4644eb 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -894,9 +894,13 @@ static int mxf_write_index_table_segment(AVFormatContext *s)
for (j = i+1; j < mxf->edit_units_count; j++) {
temporal_offset++;
if (mxf->index_entries[j].flags & 0x10) { // backward prediction
- // next is not b, so is reordered
- if (!(mxf->index_entries[i+1].flags & 0x10))
- temporal_offset = -temporal_offset;
+ // next is not b, so is reordered
+ if (!(mxf->index_entries[i+1].flags & 0x10)) {
+ if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
+ temporal_offset = 0;
+ else
+ temporal_offset = -temporal_offset;
+ }
break;
}
}
--
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