---
I performed some more benchmarking and the results at higher bitrates show that 
the current implementation is better (by a tiny amount anyway). So I rebased 
and reimplemented my change just as code simplification, without modifying the 
inline attribute of the internal function.

Cheers,
    Vittorio

 libavcodec/mpeg12enc.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 2010d2a..a616f08 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -602,13 +602,13 @@ next_coef:
 
 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
                                                       int16_t block[6][64],
-                                                      int motion_x, int 
motion_y,
-                                                      int mb_block_count)
+                                                      int motion_x, int 
motion_y)
 {
     int i, cbp;
     const int mb_x     = s->mb_x;
     const int mb_y     = s->mb_y;
     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
+    const int mb_block_count = s->chroma_format == CHROMA_420 ? 6 : 8;
 
     /* compute cbp */
     cbp = 0;
@@ -881,10 +881,7 @@ static av_always_inline void 
mpeg1_encode_mb_internal(MpegEncContext *s,
 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
                         int motion_x, int motion_y)
 {
-    if (s->chroma_format == CHROMA_420)
-        mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
-    else
-        mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
+    return mpeg1_encode_mb_internal(s, block, motion_x, motion_y);
 }
 
 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
-- 
1.7.9.5

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