[xiph-commits] r3168 - liboggplay/trunk/src/tools

[shans at svn.annodex.net]

Author: shans
Date: 2007-07-22 23:36:29 -0700 (Sun, 22 Jul 2007)
New Revision: 3168

Modified:
   liboggplay/trunk/src/tools/dump_some_frames.py
Log:
dumps a bunch of frames using timevals from an input cmml file



Modified: liboggplay/trunk/src/tools/dump_some_frames.py
===================================================================
--- liboggplay/trunk/src/tools/dump_some_frames.py	2007-07-23 06:36:07 UTC (rev 3167)
+++ liboggplay/trunk/src/tools/dump_some_frames.py	2007-07-23 06:36:29 UTC (rev 3168)
@@ -1,9 +1,32 @@
 import sys
+import Image
 from oggplay import *
+from xml.dom.ext.reader import Sax2
+from xml import xpath
 
 video_name = sys.argv[1]
 timelist = sys.argv[2]
+outname = sys.argv[3]
+f = open(timelist)
 
+reader = Sax2.Reader()
+doc = reader.fromStream(f)
+times = xpath.Evaluate('descendant::clip/@start', doc.documentElement)
+times = map(lambda a: a.nodeValue, times)
+f.close()
+
+def string_to_ms(time):
+  stime = time.split(":")
+  out = 0
+  mul = 1
+  while len(stime) > 0:
+    out += mul * float(stime[-1])
+    mul *= 60
+    del stime[-1]
+  return (int(out * 1000), time)
+
+times = map(string_to_ms, times)
+
 if video_name[:7] == "http://":
   reader = oggplay_tcp_reader_new(video_name, None, 80)
 else:
@@ -18,12 +41,24 @@
     video = i
   oggplay_set_track_active(player, i)
 
+pos = 0
+
 def data_callback(player, track_info):
+  global pos
   headers = oggplay_callback_info_get_headers(track_info[video])
-  video_data = oggplay_callback_info_get_video_data(headers[0])
-  print video_data.y
-  return -1
+  time = oggplay_callback_info_get_presentation_time(headers[0])
+  if time >= times[pos][0]:  
+    rgba = oggplay_generate_frame(player, video, headers[0])
+    image = Image.fromstring("RGBA", rgba[1], rgba[0])
+    fname = outname + ".png?t=" + times[pos][1]
+    pos += 1
+    print "saving", fname
+    image.save(fname, "PNG")
+    if pos == len(times):
+      return -1
+  return 0
 
+if len(times) == 0:
+  exit(0)
 oggplay_set_data_pycallback(player, data_callback)
-print "data callback set"
 oggplay_start_decoding(player)