Update frame_width and frame_height based on the lowres value.

Fixes issues 1387, 1097 and probably some other lowres related problems.



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@20741 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

ffmpeg.c

@@ -2944,7 +2944,11 @@ static void opt_input_file(const char *filename)
             frame_pix_fmt = enc->pix_fmt;
             rfps      = ic->streams[i]->r_frame_rate.num;
             rfps_base = ic->streams[i]->r_frame_rate.den;
-            if(enc->lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
+            if(enc->lowres) {
+                enc->flags |= CODEC_FLAG_EMU_EDGE;
+                frame_height >>= enc->lowres;
+                frame_width  >>= enc->lowres;
+            }
             if(me_threshold)
                 enc->debug |= FF_DEBUG_MV;