[FFmpeg-cvslog] avcodec/vc1: FIELDTX is only present in interlaced frame I/BI pictures

[Jerome Borsboom]

ffmpeg | branch: master | Jerome Borsboom <jerome.borsboom at carpalis.nl> | Sun May 20 13:45:56 2018 +0200| [fac5849915973ac09286d2c027237bfd99cc27fe] | committer: Michael Niedermayer

avcodec/vc1: FIELDTX is only present in interlaced frame I/BI pictures

If v->fieldtx_is_raw is not reset to zero, it may spill over from a previous
interlaced frame I/BI picture.

Signed-off-by: Jerome Borsboom <jerome.borsboom at carpalis.nl>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fac5849915973ac09286d2c027237bfd99cc27fe
---

 libavcodec/vc1.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index b7050440d5..3581d87b57 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -1010,7 +1010,8 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
                 return -1;
             av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
                    "Imode: %i, Invert: %i\n", status>>1, status&1);
-        }
+        } else
+            v->fieldtx_is_raw = 0;
         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
         if (status < 0)
             return -1;