From 5d7870dc76624e42a747a3c7c6f206c8ed9e9b2e Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Fri, 10 Dec 2010 18:25:02 +0000
Subject: [PATCH] Show per-codec options on FFmpeg commandline help.

Originally committed as revision 25927 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffmpeg.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ffmpeg.c b/ffmpeg.c
index 82c79cac28..143ec8f823 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3883,6 +3883,8 @@ static void show_usage(void)
 
 static void show_help(void)
 {
+    AVCodec *c;
+
     av_log_set_callback(log_callback_help);
     show_usage();
     show_help_options(options, "Main options:\n",
@@ -3911,6 +3913,16 @@ static void show_help(void)
     printf("\n");
     av_opt_show2(avcodec_opts[0], NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
     printf("\n");
+
+    /* individual codec options */
+    c = NULL;
+    while ((c = av_codec_next(c))) {
+        if (c->priv_class) {
+            av_opt_show2(&c->priv_class, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
+            printf("\n");
+        }
+    }
+
     av_opt_show2(avformat_opts, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
     printf("\n");
     av_opt_show2(sws_opts, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);