ffmpeg: ignore extra data streams with -dn (fixes ytdl-org#2)

Sometimes, video files will arrive with a timecode data stream
that causes `-map 0` to error out due to the stream not being
supported in the output container. These data streams generally do
not matter, so tell ffmpeg to ignore them rather than choking on
them.

youtube_dlc/postprocessor/embedthumbnail.py

@@ -96,7 +96,7 @@ def is_webp(path):
             os.rename(encodeFilename(old_thumbnail_filename), encodeFilename(thumbnail_filename))
 
             options = [
-                '-c', 'copy', '-map', '0',
+                '-c', 'copy', '-map', '0', '-dn',
                 '-attach', thumbnail_filename, '-metadata:s:t', 'mimetype=image/jpeg']
 
             self._downloader.to_screen('[ffmpeg] Adding thumbnail to "%s"' % filename)

youtube_dlc/postprocessor/ffmpeg.py

@@ -359,7 +359,7 @@ def run(self, information):
         if information['ext'] == self._preferedformat:
             self._downloader.to_screen('[ffmpeg] Not remuxing video file %s - already is in target format %s' % (path, self._preferedformat))
             return [], information
-        options = ['-c', 'copy', '-map', '0']
+        options = ['-c', 'copy', '-map', '0', '-dn']
         prefix, sep, ext = path.rpartition('.')
         outpath = prefix + sep + self._preferedformat
         self._downloader.to_screen('[' + 'ffmpeg' + '] Remuxing video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath)
@@ -428,7 +428,7 @@ def run(self, information):
         input_files = [filename] + sub_filenames
 
         opts = [
-            '-c', 'copy', '-map', '0',
+            '-c', 'copy', '-map', '0', '-dn',
             # Don't copy the existing subtitles, we may be running the
             # postprocessor a second time
             '-map', '-0:s',
@@ -498,7 +498,7 @@ def add(meta_list, info_list=None):
         filename = info['filepath']
         temp_filename = prepend_extension(filename, 'temp')
         in_filenames = [filename]
-        options = ['-map', '0']
+        options = ['-map', '0', '-dn']
 
         if info['ext'] == 'm4a':
             options.extend(['-vn', '-acodec', 'copy'])
@@ -578,7 +578,7 @@ def run(self, info):
         filename = info['filepath']
         temp_filename = prepend_extension(filename, 'temp')
 
-        options = ['-c', 'copy', '-map', '0', '-aspect', '%f' % stretched_ratio]
+        options = ['-c', 'copy', '-map', '0', '-dn', '-aspect', '%f' % stretched_ratio]
         self._downloader.to_screen('[ffmpeg] Fixing aspect ratio in "%s"' % filename)
         self.run_ffmpeg(filename, temp_filename, options)
 
@@ -596,7 +596,7 @@ def run(self, info):
         filename = info['filepath']
         temp_filename = prepend_extension(filename, 'temp')
 
-        options = ['-c', 'copy', '-map', '0', '-f', 'mp4']
+        options = ['-c', 'copy', '-map', '0', '-dn', '-f', 'mp4']
         self._downloader.to_screen('[ffmpeg] Correcting container in "%s"' % filename)
         self.run_ffmpeg(filename, temp_filename, options)
 
@@ -612,7 +612,7 @@ def run(self, info):
         if self.get_audio_codec(filename) == 'aac':
             temp_filename = prepend_extension(filename, 'temp')
 
-            options = ['-c', 'copy', '-map', '0', '-f', 'mp4', '-bsf:a', 'aac_adtstoasc']
+            options = ['-c', 'copy', '-map', '0', '-dn', '-f', 'mp4', '-bsf:a', 'aac_adtstoasc']
             self._downloader.to_screen('[ffmpeg] Fixing malformed AAC bitstream in "%s"' % filename)
             self.run_ffmpeg(filename, temp_filename, options)