avcodec/h264: mark recovery_cnt==0 frames as keyframes

Fixes Ticket3063
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/h264.c

@@ -1781,6 +1781,8 @@ static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
 
     av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
 
+    if (srcp->sei_recovery_frame_cnt == 0)
+        dst->key_frame = 1;
     if (!srcp->crop)
         return 0;
 

libavcodec/h264.h

@@ -324,6 +324,7 @@ typedef struct H264Picture {
     int reference;
     int recovered;          ///< picture at IDR or recovery point + recovery count
     int invalid_gap;
+    int sei_recovery_frame_cnt;
 
     int crop;
     int crop_left;

libavcodec/h264_picture.c

@@ -122,6 +122,7 @@ int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
     dst->crop_top      = src->crop_top;
     dst->recovered     = src->recovered;
     dst->invalid_gap   = src->invalid_gap;
+    dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
 
     return 0;
 fail:

libavcodec/h264_slice.c

@@ -744,6 +744,7 @@ static int h264_frame_start(H264Context *h)
     pic->mmco_reset  = 0;
     pic->recovered   = 0;
     pic->invalid_gap = 0;
+    pic->sei_recovery_frame_cnt = h->sei_recovery_frame_cnt;
 
     if ((ret = alloc_picture(h, pic)) < 0)
         return ret;