fftools/ffmpeg: change fps progress log message to show two decimal digits

Useful when transcoding videos at 29.97 fps because delivers a more accurate result for monitoring.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

fftools/ffmpeg.c

@@ -1706,7 +1706,7 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
             av_bprintf(&buf, "frame=%5d fps=%3.*f q=%3.1f ",
                      frame_number, fps < 9.95, fps, q);
             av_bprintf(&buf_script, "frame=%d\n", frame_number);
-            av_bprintf(&buf_script, "fps=%.1f\n", fps);
+            av_bprintf(&buf_script, "fps=%.2f\n", fps);
             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
                        ost->file_index, ost->index, q);
             if (is_last_report)