From 8bb5680d904008b1a851f14078a2e9a9e9489fee Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefasab@gmail.com>
Date: Sun, 10 Mar 2013 15:36:20 +0100
Subject: [PATCH] cmdutils: improve feedback in case of not found option

---
 cmdutils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cmdutils.c b/cmdutils.c
index 75c1793128..8b8eacc3b1 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -294,7 +294,8 @@ static int write_option(void *optctx, const OptionDef *po, const char *opt,
         int ret = po->u.func_arg(optctx, opt, arg);
         if (ret < 0) {
             av_log(NULL, AV_LOG_ERROR,
-                   "Failed to set value '%s' for option '%s'\n", arg, opt);
+                   "Failed to set value '%s' for option '%s': %s\n",
+                   arg, opt, av_err2str(ret));
             return ret;
         }
     }
@@ -546,6 +547,8 @@ int opt_default(void *optctx, const char *opt, const char *arg)
 
     if (consumed)
         return 0;
+    av_log(NULL, AV_LOG_ERROR, "Could not find option '%s' in any of the FFmpeg subsystems "
+           "(codec, format, scaler, resampler contexts)\n", opt);
     return AVERROR_OPTION_NOT_FOUND;
 }