From e4637d6a60af0c414f8953826a51d77e5aee508f Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 13 Dec 2009 13:49:14 +0000
Subject: [PATCH] Show help if no cmd line options are provided at all. This
 safes the users time to find out which of -h --help -? works.

Originally committed as revision 20822 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffmpeg.c | 3 +++
 ffplay.c | 1 +
 2 files changed, 4 insertions(+)

diff --git a/ffmpeg.c b/ffmpeg.c
index a1abd30cfe..2974edd177 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3985,6 +3985,9 @@ int main(int argc, char **argv)
     /* parse options */
     parse_options(argc, argv, options, opt_output_file);
 
+    if(nb_output_files <= 0 && nb_input_files == 0)
+        show_help();
+
     /* file converter / grab */
     if (nb_output_files <= 0) {
         fprintf(stderr, "At least one output file must be specified\n");
diff --git a/ffplay.c b/ffplay.c
index 5eb5a21165..39d960a7e4 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2539,6 +2539,7 @@ int main(int argc, char **argv)
     parse_options(argc, argv, options, opt_input_file);
 
     if (!input_filename) {
+        show_help();
         fprintf(stderr, "An input file must be specified\n");
         exit(1);
     }