[FFmpeg-devel] [PATCH] avidec: Mark first frame as keyframe in case there are no keyframes.

[Michael Niedermayer]

This fixes seeking in filecopy.avi of Ticket504

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavformat/avidec.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 704980c..226da27 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -1236,6 +1236,7 @@ static int avi_read_idx1(AVFormatContext *s, int size)
     unsigned int index, tag, flags, pos, len, first_packet = 1;
     unsigned last_pos= -1;
     int64_t idx1_pos, first_packet_pos = 0, data_offset = 0;
+    int anykey = 0;
 
     nb_index_entries = size / 16;
     if (nb_index_entries <= 0)
@@ -1283,6 +1284,14 @@ static int avi_read_idx1(AVFormatContext *s, int size)
             av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
         ast->cum_len += get_duration(ast, len);
         last_pos= pos;
+        anykey |= flags&AVIIF_INDEX;
+    }
+    if (!anykey) {
+        for (index = 0; index < s->nb_streams; index++) {
+            st = s->streams[index];
+            if (st->nb_index_entries)
+                st->index_entries[0].flags |= AVINDEX_KEYFRAME;
+        }
     }
     return 0;
 }
-- 
1.7.5.4