Use log2(x) instead of log(x) / log(2)

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/avconv.c b/avconv.c
index 2bc9d82378..83ff8b45e1 100644
--- a/avconv.c
+++ b/avconv.c
@@ -820,7 +820,7 @@ static void print_report(int is_last_report, int64_t timer_start)
                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
                     qp_histogram[qp]++;
                 for (j = 0; j < 32; j++)
-                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
+                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
             }
             if (enc->flags&CODEC_FLAG_PSNR) {
                 int j;