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scene change detection

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Originally committed as revision 337 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-03-17 19:45:33 +00:00
parent c674115939
commit bd31a7750f
1 changed files with 13 additions and 1 deletions
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14
libavcodec/mpegvideo.c
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@ -487,7 +487,6 @@ int MPV_encode_picture(AVCodecContext *avctx,
} else { } else {
s->pict_type = I_TYPE; s->pict_type = I_TYPE;
} }
avctx->key_frame = (s->pict_type == I_TYPE);
MPV_frame_start(s); MPV_frame_start(s);
@ -518,6 +517,7 @@ int MPV_encode_picture(AVCodecContext *avctx,
} }
encode_picture(s, s->picture_number); encode_picture(s, s->picture_number);
avctx->key_frame = (s->pict_type == I_TYPE);
MPV_frame_end(s); MPV_frame_end(s);
s->picture_number++; s->picture_number++;
@ -1078,6 +1078,18 @@ static void encode_picture(MpegEncContext *s, int picture_number)
} }
} }
if(s->avg_mb_var < s->mc_mb_var && s->pict_type != B_TYPE){ //FIXME subtract MV bits
int i;
s->pict_type= I_TYPE;
for(i=0; i<s->mb_height*s->mb_width; i++){
s->mb_type[i] = I_TYPE;
s->mv_table[0][i] = 0;
s->mv_table[1][i] = 0;
}
}
// printf("%d %d\n", s->avg_mb_var, s->mc_mb_var);
if (!s->fixed_qscale) if (!s->fixed_qscale)
s->qscale = rate_estimate_qscale(s); s->qscale = rate_estimate_qscale(s);