Use url_fopen error code when opening input file

handle the AVERROR_NOENT error case in print_error

Originally committed as revision 8977 to svn://svn.ffmpeg.org/ffmpeg/trunk

cmdutils.c

@@ -138,6 +138,9 @@ void print_error(const char *filename, int err)
     case AVERROR_NOMEM:
         fprintf(stderr, "%s: memory allocation error occured\n", filename);
         break;
+    case AVERROR_NOENT:
+        fprintf(stderr, "%s: no such file or directory\n", filename);
+        break;
     default:
         fprintf(stderr, "%s: Error while opening file\n", filename);
         break;