diff --git a/panasonic.py b/panasonic.py
index 1a4d281..433b4b3 100755
--- a/panasonic.py
+++ b/panasonic.py
@@ -153,9 +153,11 @@ def dumpFilms(films):
 def getInitialTSFromBuffer(content):
     logger = logging.getLogger(__name__)
 
-    with Popen(['ffprobe','/dev/stdin','-loglevel', 'quiet', '-read_intervals', '0%+0.000001', '-show_entries', 'frame=frame_no,best_effort_timestamp_time', '-of','json'], stdout=PIPE, stdin=PIPE) as ffprobe:
+    logger.debug('Determining initial timestamp from content')
+    with Popen(['ffprobe','/dev/stdin','-loglevel', 'quiet', '-read_intervals', '0%+0.1', '-show_entries', 'frame=frame_no,best_effort_timestamp_time', '-of','json'], stdout=PIPE, stdin=PIPE) as ffprobe:
         out, _ = ffprobe.communicate(input=content)
         frames = json.load(BytesIO(out))
+        logger.debug('Frames: %s' % frames)
         if 'frames' in frames:
             frames = frames['frames']
             if len(frames) > 0:
@@ -173,10 +175,12 @@ def getInitialTSFromBuffer(content):
 def getLastTSFromBuffer(content):
     logger = logging.getLogger(__name__)
     
+    logger.debug('Determining last timestamp from content.')
     length = len(content)
     with Popen(['ffprobe', '/dev/stdin', '-loglevel', 'quiet', '-show_entries', 'frame=frame_no,best_effort_timestamp_time', '-of','json'], stdout=PIPE, stdin=PIPE) as ffprobe:
-        out, _ = ffprobe.communicate(input=content[max(0,length-100000):])
+        out, _ = ffprobe.communicate(input=content[max(0,length-200000):])
         frames = json.load(BytesIO(out))
+        logger.debug('Frames: %s' % frames)
         if 'frames' in frames:
             frames = frames['frames']
             if len(frames) > 0:
@@ -247,12 +251,15 @@ def downloadMovie(url, outputFileName, duration):
     if m == None:
         logger.error('Impossible to parse timestamps' % r.headers['TimeSeekRange.dlna.org'])
         exit(-1)
-        
+  
     total = int(m.group('totalsecs'))+(int(m.group('totalms')))/1000
     total = timedelta(seconds=total)
-    
+    logger.debug('Header: %s' % r.headers)
+
     initialTS = getInitialTSFromBuffer(r.content)
+    logger.debug('Initial timestamp: %s' % initialTS)
     lastTS = getLastTSFromBuffer(r.content)
+    logger.debug('Last timestamp: %s' % lastTS)
     delta = lastTS-initialTS    
     ratio = delta/total
     estimatedLength = ceil(len(r.content)/ratio)