From: Anatoly Nenashev <[email protected]>
Problem description, preliminary review discussion at
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/127731
---
libavcodec/mpegvideo.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 1c5ff27..1fb2522 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -991,8 +991,13 @@ int MPV_frame_start(MpegEncContext *s, AVCodecContext
*avctx)
s->pict_type, s->dropable);*/
if(s->codec_id != CODEC_ID_H264){
- if((s->last_picture_ptr==NULL || s->last_picture_ptr->data[0]==NULL)
&& s->pict_type!=FF_I_TYPE){
- av_log(avctx, AV_LOG_ERROR, "warning: first frame is no
keyframe\n");
+ if((s->last_picture_ptr==NULL || s->last_picture_ptr->data[0]==NULL) &&
+ (s->pict_type!=FF_I_TYPE || s->picture_structure != PICT_FRAME)){
+ if (s->pict_type != FF_I_TYPE)
+ av_log(avctx, AV_LOG_ERROR, "warning: first frame is no
keyframe\n");
+ else if (s->picture_structure != PICT_FRAME)
+ av_log(avctx, AV_LOG_INFO, "allocate dummy last picture for
field based first keyframe\n");
+
/* Allocate a dummy frame */
i= ff_find_unused_picture(s, 0);
s->last_picture_ptr= &s->picture[i];
--
1.7.0.4
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