[naver] Add rtmp formats (fixes #3054)

youtube_dl/downloader/rtmp.py

@@ -96,6 +96,7 @@ class RtmpFD(FileDownloader):
         flash_version = info_dict.get('flash_version', None)
         live = info_dict.get('rtmp_live', False)
         conn = info_dict.get('rtmp_conn', None)
+        protocol = info_dict.get('rtmp_protocol', None)
 
         self.report_destination(filename)
         tmpfilename = self.temp_name(filename)
@@ -133,6 +134,8 @@ class RtmpFD(FileDownloader):
                 basic_args += ['--conn', entry]
         elif isinstance(conn, compat_str):
             basic_args += ['--conn', conn]
+        if protocol is not None:
+            basic_args += ['--protocol', protocol]
         args = basic_args + [[], ['--resume', '--skip', '1']][not live and self.params.get('continuedl', False)]
 
         if sys.platform == 'win32' and sys.version_info < (3, 0):

youtube_dl/extractor/naver.py

@@ -47,14 +47,19 @@ class NaverIE(InfoExtractor):
         formats = []
         for format_el in urls.findall('EncodingOptions/EncodingOption'):
             domain = format_el.find('Domain').text
-            if domain.startswith('rtmp'):
-                continue
-            formats.append({
+            f = {
                 'url': domain + format_el.find('uri').text,
                 'ext': 'mp4',
                 'width': int(format_el.find('width').text),
                 'height': int(format_el.find('height').text),
+            }
+            if domain.startswith('rtmp'):
+                f.update({
+                    'ext': 'flv',
+                    'rtmp_protocol': '1', # rtmpt
                 })
+            formats.append(f)
+        self._sort_formats(formats)
 
         return {
             'id': video_id,