From 1db161ec93baf9451d061b1a420dbb4fa82bd19d Mon Sep 17 00:00:00 2001
From: mrbesen <y.g.2@gmx.de>
Date: Mon, 16 Mar 2020 13:43:22 +0100
Subject: [PATCH] print (en/de)coders

---
 fftools/cmdutils.c   | 18 +++++++++++++++++-
 fftools/cmdutils.h   |  3 +++
 fftools/ffmpeg_opt.c | 13 ++++++++++++-
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
index e5b89a443b..68bbb76eb4 100644
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@ -1608,7 +1608,7 @@ int show_codecs(void *optctx, const char *opt, const char *arg)
     return 0;
 }
 
-static void print_codecs(int encoder)
+void print_codecs(int encoder)
 {
     const AVCodecDescriptor **codecs;
     unsigned i, nb_codecs = get_codecs_sorted(&codecs);
@@ -1646,6 +1646,22 @@ static void print_codecs(int encoder)
     av_free(codecs);
 }
 
+void print_codecs_short(int encoder) {
+	const AVCodecDescriptor **codecs;
+	unsigned i, nb_codecs = get_codecs_sorted(&codecs);
+
+	for (i = 0; i < nb_codecs; i++) {
+		const AVCodecDescriptor *desc = codecs[i];
+		const AVCodec *codec = NULL;
+
+		while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
+				printf(" %s", codec->name);
+		}
+	}
+	printf("\n");
+	av_free(codecs);
+}
+
 int show_decoders(void *optctx, const char *opt, const char *arg)
 {
     print_codecs(0);
diff --git a/fftools/cmdutils.h b/fftools/cmdutils.h
index 1917510589..faa14c9b64 100644
--- a/fftools/cmdutils.h
+++ b/fftools/cmdutils.h
@@ -51,6 +51,9 @@ extern AVDictionary *swr_opts;
 extern AVDictionary *format_opts, *codec_opts, *resample_opts;
 extern int hide_banner;
 
+void print_codecs(int encoder);
+void print_codecs_short(int encoder);
+
 /**
  * Register a program-specific cleanup routine.
  */
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index aa6ede5e88..797f8df0a7 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -683,7 +683,18 @@ static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int e
     }
 
     if (!codec) {
-        av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
+	    int c;
+
+    	av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
+
+        av_log(NULL, AV_LOG_INFO, "Print %ss? [y/n]", codec_string);
+
+        c = getchar();
+        if(c == 'y' || c == 'Y') {
+        	printf("\n");
+	        print_codecs_short(encoder);
+        }
+
         exit_program(1);
     }
     if (codec->type != type) {