Fix VC-1 playback with pulldown content

The attached patch fixes the jerky playback of VC-1 content with pulldown. The pulldown flags were incorrectly set. They must be correct in order to display the frames with the correct timing as mentioned in the specifications: "SMPTE 421M: VC-1 Compressed Video Bitstream Format and Decoding Process". More precisely the following tables:

Table 20: Progressive P picture layer bitstream for Advanced Profile
Table 22: Progressive B picture layer bitstream for Advanced Profile
Table 23: Progressive Skipped picture layer bitstream for Advanced Profile
Table 82: Interlaced Frame I and BI picture layer bitstream for Advanced Profile
Table 83: Interlaced Frame P picture layer bitstream for Advanced Profile
Table 84: Interlaced Frame B picture layer bitstream for Advanced Profile
Table 85: Picture Layer bitstream for Field 1 of Interlace Field Picture for Advanced Profile

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

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 1b77105f078a6c19fc8e34fe17c0bfadef9bb7a0..73f0cba042b32b82596dc8b7ea2aa2175d951125 100644 (file)
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -859,7 +859,7 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
             v->rptfrm = get_bits(gb, 2);
         } else {
             v->tff = get_bits1(gb);
-            v->rptfrm = get_bits1(gb);
+            v->rff = get_bits1(gb);
         }
     }
     if(v->panscanflag) {