vpxenc: send usage to stderr

Thanks to hiiragikei AT gmail.com for the fix.

Change-Id: Iab6c0822593fc5557d86efbb014ff6409ff05b35

1 files changed, 7 insertions, 7 deletions

diff --git a/vpxenc.c b/vpxenc.c
index a60b84d6e..547b5722f 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -1180,22 +1180,22 @@ static void usage_exit() {
           exec_name);
 
   fprintf(stderr, "\nOptions:\n");
-  arg_show_usage(stdout, main_args);
+  arg_show_usage(stderr, main_args);
   fprintf(stderr, "\nEncoder Global Options:\n");
-  arg_show_usage(stdout, global_args);
+  arg_show_usage(stderr, global_args);
   fprintf(stderr, "\nRate Control Options:\n");
-  arg_show_usage(stdout, rc_args);
+  arg_show_usage(stderr, rc_args);
   fprintf(stderr, "\nTwopass Rate Control Options:\n");
-  arg_show_usage(stdout, rc_twopass_args);
+  arg_show_usage(stderr, rc_twopass_args);
   fprintf(stderr, "\nKeyframe Placement Options:\n");
-  arg_show_usage(stdout, kf_args);
+  arg_show_usage(stderr, kf_args);
 #if CONFIG_VP8_ENCODER
   fprintf(stderr, "\nVP8 Specific Options:\n");
-  arg_show_usage(stdout, vp8_args);
+  arg_show_usage(stderr, vp8_args);
 #endif
 #if CONFIG_VP9_ENCODER
   fprintf(stderr, "\nVP9 Specific Options:\n");
-  arg_show_usage(stdout, vp9_args);
+  arg_show_usage(stderr, vp9_args);
 #endif
   fprintf(stderr, "\nStream timebase (--timebase):\n"
           "  The desired precision of timestamps in the output, expressed\n"