I found a couple of tiny (but crippling) y4mblackfix bugs.  Did you check
in the right version?  Seems to work now.

Dan

--- y4mblackfix.c.orig  2003-03-12 12:44:53.000000000 -0500
+++ y4mblackfix.c       2003-03-12 23:13:43.000000000 -0500
@@ -174,9 +174,9 @@
  * process.
 */
                mjpeg_info("frame %d num_dark: %d %s", frames, num_dark,
-                       num_dark <= pixel_thresh ? "" : "X");
+                       num_dark < pixel_thresh ? "" : "X");
 
-               if      (num_dark <= pixel_thresh || nomodify)
+               if      (num_dark < pixel_thresh || nomodify)
                        goto outputframe;
 
 /*
@@ -187,9 +187,9 @@
                        {
                        for     (j = 0; j < width; j++)
                                {
-                               y = yuv[0][i + j];
-                               u = yuv[1][(i/2) + (j/2)];
-                               v = yuv[2][(i/2) + (j/2)];
+                               y = yuv[0][(i * width) + j];
+                               u = yuv[1][(i/2) * (width/2) + (j/2)];
+                               v = yuv[2][(i/2) * (width/2) + (j/2)];
                                if      (y > highpass)
                                        continue;
                                if ((luma_center - luma_radius) <= y &&



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