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fade: fix draw_slice() check on fade->factor value
draw_slice() checks that the fade factor is < 65536 and only calculates the fade if so. But the fade factor is clipped in end_frame() by av_clip_uint16() to 65535, so the fade is calculated for every frame. This patch alters the check so that it compares with < 65535 (UINT16_MAX).
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@ -101,7 +101,7 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
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uint8_t *p;
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int i, j, plane;
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if (fade->factor < 65536) {
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if (fade->factor < UINT16_MAX) {
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/* luma or rgb plane */
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for (i = 0; i < h; i++) {
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p = outpic->data[0] + (y+i) * outpic->linesize[0];
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