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| author | Anatoly Nenashev <anatoly.nenashev@ovsoft.ru> | 2011-03-27 21:41:48 +0200 |
|---|---|---|
| committer | Reinhard Tartler <siretart@tauware.de> | 2011-05-11 16:35:02 +0200 |
| commit | b44c8ad280c221691560ae9625421416e20c483f (patch) | |
| tree | 434f4b561822b96f5c1c345829112f346de6be25 | |
| parent | d2bf42895ac30d228491a8a95a5908351dc32783 (diff) | |
| download | ffmpeg-b44c8ad280c221691560ae9625421416e20c483f.tar.gz | |
Fix crash of interlaced MPEG2 decoding
Problem description, preliminary review discussion at
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/127731
| -rw-r--r-- | libavcodec/mpegvideo.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index f4de8dded4..2c0525e2ad 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -998,8 +998,13 @@ 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!=AV_PICTURE_TYPE_I){ - 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!=AV_PICTURE_TYPE_I || s->picture_structure != PICT_FRAME)){ + if (s->pict_type != AV_PICTURE_TYPE_I) + 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]; |