From: Jan Engelhardt <jengelh@inai.de>

Date: 2016-04-10 23:23:53.138440254 +0200

​

Improve the error messages a bit to say what's really going on

(in light of openSUSE's reduced build).

​

---

 fftools/ffmpeg.c        |    2 +-

 fftools/ffmpeg_filter.c |    4 ++--

 fftools/ffmpeg_opt.c    |    2 +-

 3 files changed, 4 insertions(+), 4 deletions(-)

​

Index: ffmpeg-4.2/fftools/ffmpeg.c

===================================================================

--- ffmpeg-4.2.orig/fftools/ffmpeg.c

+++ ffmpeg-4.2/fftools/ffmpeg.c

@@ -2898,7 +2898,7 @@ static int init_input_stream(int ist_ind

     if (ist->decoding_needed) {

         AVCodec *codec = ist->dec;

         if (!codec) {

-            snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",

+            snprintf(error, error_len, "This build of ffmpeg does not include a \"%s\" decoder needed for input stream #%d:%d.",

                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);

             return AVERROR(EINVAL);

         }

Index: ffmpeg-4.2/fftools/ffmpeg_filter.c

===================================================================

--- ffmpeg-4.2.orig/fftools/ffmpeg_filter.c

+++ ffmpeg-4.2/fftools/ffmpeg_filter.c

@@ -981,7 +981,7 @@ static int configure_input_filter(Filter

 {

     if (!ifilter->ist->dec) {

         av_log(NULL, AV_LOG_ERROR,

-               "No decoder for stream #%d:%d, filtering impossible\n",

+               "This build of ffmpeg does not have a suitable decoder for stream #%d:%d enabled, filtering impossible\n",

                ifilter->ist->file_index, ifilter->ist->st->index);

         return AVERROR_DECODER_NOT_FOUND;

     }

@@ -1131,7 +1131,7 @@ int configure_filtergraph(FilterGraph *f

         if (!ost->enc) {

             /* identical to the same check in ffmpeg.c, needed because

                complex filter graphs are initialized earlier */

-            av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",

+            av_log(NULL, AV_LOG_ERROR, "This build of ffmpeg does not include a \"%s\" encoder needed for output stream #%d:%d.\n",

                      avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);

             ret = AVERROR(EINVAL);

             goto fail;

Index: ffmpeg-4.2/fftools/ffmpeg_opt.c

===================================================================

--- ffmpeg-4.2.orig/fftools/ffmpeg_opt.c

+++ ffmpeg-4.2/fftools/ffmpeg_opt.c

@@ -1327,7 +1327,7 @@ static int choose_encoder(OptionsContext

             if (!ost->enc) {

                 av_log(NULL, AV_LOG_FATAL, "Automatic encoder selection failed for "

                        "output stream #%d:%d. Default encoder for format %s (codec %s) is "

-                       "probably disabled. Please choose an encoder manually.\n",

+                       "probably disabled or this build of ffmpeg does not include that codec. Please choose an encoder manually.\n",

                        ost->file_index, ost->index, s->oformat->name,

                        avcodec_get_name(ost->st->codecpar->codec_id));

                 return AVERROR_ENCODER_NOT_FOUND;

​