transcode: When failing also print the fourcc we were looking for instead of...

transcode: When failing also print the fourcc we were looking for instead of just "(null)" if no explicit module was selected.

modules/stream_out/transcode.c

@@ -1401,7 +1401,8 @@ static int transcode_audio_new( sout_stream_t *p_stream,
         module_Need( id->p_encoder, "encoder", p_sys->psz_aenc, true );
     if( !id->p_encoder->p_module )
     {
-        msg_Err( p_stream, "cannot find audio encoder (%s)", p_sys->psz_aenc );
+        msg_Err( p_stream, "cannot find audio encoder (%s/%4.4s)",
+                 p_sys->psz_aenc, (char *)&p_sys->i_acodec );
         module_Unneed( id->p_decoder, id->p_decoder->p_module );
         id->p_decoder->p_module = NULL;
         return VLC_EGENERIC;
@@ -1495,7 +1496,8 @@ static int transcode_audio_new( sout_stream_t *p_stream,
             module_Need( id->p_encoder, "encoder", p_sys->psz_aenc, true );
         if( !id->p_encoder->p_module )
         {
-            msg_Err( p_stream, "cannot find audio encoder (%s)", p_sys->psz_aenc );
+            msg_Err( p_stream, "cannot find audio encoder (%s/%4.4s)",
+                     p_sys->psz_aenc, (char *)&p_sys->i_acodec );
             transcode_audio_close( id );
             return VLC_EGENERIC;
         }
@@ -1835,7 +1837,8 @@ static int transcode_video_new( sout_stream_t *p_stream, sout_stream_id_t *id )
         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, true );
     if( !id->p_encoder->p_module )
     {
-        msg_Err( p_stream, "cannot find video encoder (%s)", p_sys->psz_venc );
+        msg_Err( p_stream, "cannot find video encoder (%s/%4.4s)",
+                 p_sys->psz_venc, (char *)&p_sys->i_vcodec );
         module_Unneed( id->p_decoder, id->p_decoder->p_module );
         id->p_decoder->p_module = 0;
         return VLC_EGENERIC;
@@ -2149,7 +2152,8 @@ static int transcode_video_encoder_open( sout_stream_t *p_stream,
         module_Need( id->p_encoder, "encoder", p_sys->psz_venc, true );
     if( !id->p_encoder->p_module )
     {
-        msg_Err( p_stream, "cannot find video encoder (%s)", p_sys->psz_venc );
+        msg_Err( p_stream, "cannot find video encoder (%s/%4.4s)",
+                 p_sys->psz_venc, (char *)&p_sys->i_vcodec );
         return VLC_EGENERIC;
     }