daemon/packager.py

@@ -87,7 +87,9 @@ class Mediasite:
                         else:
                             myslide['duration'] = '{}ms'.format(int(data['slides'][i+1]['duration']) - int(data['slides'][i]['duration']))
 
-                        # Commit to the demuxfile
+                        # Commit to the demuxfile. Duration is assumed to be seconds unless staded otherwise
+                        # https://ffmpeg.org/ffmpeg-utils.html#Time-duration
+                        # https://trac.ffmpeg.org/wiki/Slideshow
                         f.write('file \'{}\'\n'.format(myslide['url']))
                         f.write('duration {}\n'.format(myslide['duration']))
                         slides.append(myslide)

daemon/transcoder.py

@@ -193,6 +193,8 @@ class _Worker:
 
         self.logger.debug("%s - Calling ffmpeg", package_id)
         start = time.time()
+        # https://ffmpeg.org/ffmpeg-formats.html#toc-concat-1
+        # https://github.com/kkroening/ffmpeg-python/tree/master/examples
         (ffmpeg
             .input(demux_file, safe=0)
             .filter('scale', height='min(in_h, {})'.format(maxheight), width=-2)