poster still

oxdbarchive/cache.py

@@ -56,3 +56,11 @@ def loadTimeline(afile):
   if exists(timeline):
     return loadFile(timeline)
   return ''
+
+def loadPosterStill(afile, position):
+  still = afile.posterStillFile
+  if not exists(still):
+    afile.extractPosterStill(position)
+  if exsts(still):
+    return loadFile(still)
+  return ''

oxdbarchive/controllers.py

@@ -46,4 +46,8 @@ class Root(controllers.RootController):
         cherrypy.response.headerMap['Content-Type'] = "image/jpeg"
         cherrypy.response.headerMap["Expires"] = httpExpires(60*60*24*15)
         return f.frame(position)
+      elif action == 'posterStill':
+        cherrypy.response.headerMap['Content-Type'] = "image/png"
+        cherrypy.response.headerMap["Expires"] = httpExpires(60*60*24*15)
+        return f.posterStill(position)
     return dict()

oxdbarchive/model.py

@@ -305,15 +305,16 @@ class ArchiveFile(SQLObject):
   def updateMeta(self):
     self.findSubtitleLink()
     if exists(self.absolutePath):
-      info = midentify.identify(self.absolutePath)
-      self.length = info['length']
-      self.width = info['width']
-      self.frameAspect = "%0.6f" % info['aspect']
-      self.height = info['height']      
-      self.bitrate = info['video_bitrate']
-      self.fps = info['fps']
-      self.audio = info['audio_codec']
-      self.video = info['video_codec']
+      if not self.broken:
+        info = midentify.identify(self.absolutePath)
+        self.length = info['length']
+        self.width = info['width']
+        self.frameAspect = "%0.6f" % info['aspect']
+        self.height = info['height']      
+        self.bitrate = info['video_bitrate']
+        self.fps = info['fps']
+        self.audio = info['audio_codec']
+        self.video = info['video_codec']
       self.updatePixels()
       self.updateBpp()
       self.loadSubtitleFromFile()
@@ -377,7 +378,7 @@ class ArchiveFile(SQLObject):
   
   def _get_mini_movie_file(self):
     return join(cache.cache_root, 'mini', self.md5sum[:4], "%s.avi" % self.md5sum)
-    
+  
   def _get_frameFolder(self):
     f = join(cache.cache_root, 'frame', self.md5sum[:4], self.md5sum)
     oxdb_makedir(f)
@@ -385,7 +386,10 @@ class ArchiveFile(SQLObject):
   
   def _get_timelineFile(self):
     return join(cache.cache_root, 'timeline', self.md5sum[:4], "%s.png" % self.md5sum)
-
+  
+  def _get_posterStillFile(self):
+    return join(cache.cache_root, 'posterStill', self.md5sum[:4], "%s.png" % self.md5sum)
+  
   def removeMiniMovie(self): 
     if exists(self.mini_movie_file):
       os.remove(self.mini_movie_file)
@@ -458,6 +462,9 @@ class ArchiveFile(SQLObject):
     for p in self._startPoints():
       self.extractFrame(p)
   
+  def extractPosterStill(self, position, img_folder=):
+    extract_poster_still(self.movieFile, self.posterStillFile, position)
+
   def extractClipMovie(self, force = False): 
     if self.broken:
       return
@@ -485,8 +492,7 @@ class ArchiveFile(SQLObject):
     cmd = "mencoder %s >/dev/null 2>&1" % options
     print cmd.encode('utf-8')
     os.system(cmd.encode('utf-8'))
-
-    
+  
   def removeTimeline(self):
     if exists(self.timelineFile):
       os.unlink(self.timelineFile)
@@ -582,3 +588,6 @@ class ArchiveFile(SQLObject):
   
   def timeline(self):
     return cache.loadTimeline(self)
+  
+  def posterStill(self, position):
+    return cache.loadPosterStill(self, position)

oxdbarchive/subtitles.py

@@ -219,8 +219,18 @@ def extract_frame(movie_file, timestamp, img_folder, width=128, offset = 0, redo
   else:
     print "update the cache %s missing" % movie_file
   shutil.rmtree(framedir)
-  
-  
+
+def extract_poster_still(movie_file, png_file, inpoint):
+  ext = movie_file.split('.')[-1]
+  if ext in ('sub', 'srt'):
+    print "this is not a movie file, will not try to extract frames"
+    return
+  inpoint = time_str2msec(inpoint)
+  extractClipScript = abspath(join(dirname(__file__), "tools/extract_poster_still.py"))
+
+  cmd = '''%s "%s" "%s" %s''' % (extractClipScript, movie_file, png_file, inpoint)
+  os.system(cmd.encode('utf-8'))
+
 def extract_subtitles(movie_file, srt, img_folder, width=128, offset = 0, redo = False):
   subtitles = srt2dict(srt)  
   for k in sorted([int(k) for k in subtitles.keys()]):

oxdbarchive/tools/extract_poster_still.py

@@ -0,0 +1,108 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+# -*- Mode: Python; -*-
+# vi:si:et:sw=2:sts=2:ts=2
+#
+import os
+import time
+
+import gobject
+gobject.threads_init()
+
+import pygst
+pygst.require("0.10")
+import gst
+import Image
+
+class PosterStill:
+  getShot = False
+  length = 0
+  height = 0
+  def __init__(self, videofile, png='', nseconds=-1, height=128):
+    s = ''' filesrc name=input 
+          ! decodebin name=dbin 
+          ! queue name =q 
+          ! ffmpegcolorspace ! video/x-raw-rgb 
+          ! fakesink name=output signal-handoffs=true
+        '''
+
+    self.height = height
+    self.pipeline = gst.parse_launch(s)
+    self.input  = self.pipeline.get_by_name('input')
+    self.fakesink = self.pipeline.get_by_name('output')
+    self.dbin = self.pipeline.get_by_name('dbin')
+    self.bus = self.pipeline.get_bus()
+    self.input.props.location = videofile
+
+    self.pipeline.set_state(gst.STATE_PAUSED)
+    self.pipeline.get_state()
+
+    #length
+    queue = self.pipeline.get_by_name('q')
+    pads = queue.sink_pads()
+    q = gst.query_new_duration(gst.FORMAT_TIME)
+    for pad in pads:
+      if pad.get_peer() and pad.get_peer().query(q):
+        format, self.length = q.parse_duration()
+
+    if nseconds>-1 and png:
+      self.png(png, nseconds)
+
+  def close(self):
+    self.pipeline.set_state(gst.STATE_NULL)
+    self.pipeline.get_state()
+
+  def seek(self, nseconds):
+    if(self.length and self.length < nseconds):
+      nseconds = 0
+    event = gst.event_new_seek(1.0, gst.FORMAT_TIME,
+            gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
+            gst.SEEK_TYPE_SET, nseconds,
+            gst.SEEK_TYPE_NONE, 0)
+
+    res = self.fakesink.send_event(event)
+    if res:
+      self.pipeline.set_new_stream_time(0L)
+    else:
+        gst.error("seek to %r failed" % nseconds)
+
+  def png(self, png, nseconds):
+    self.png_frame = png
+    self.pipeline.set_state(gst.STATE_PAUSED)
+    self.pipeline.get_state()
+    self.seek(nseconds)
+    self.pipeline.set_state(gst.STATE_PLAYING)
+    self.pipeline.get_state()
+
+    ho = self.fakesink.connect("handoff", self.snapshot_png_handoff_cb)
+    self.getShot = True
+    while self.getShot:
+      msg = self.bus.poll(gst.MESSAGE_ANY, gst.SECOND)
+      if not msg:
+        break
+    self.fakesink.disconnect(ho)
+
+  def snapshot_png_handoff_cb(self, sink, buffer, pad):
+    if self.getShot:
+      caps = sink.sink_pads().next().get_negotiated_caps()
+      for s in caps:
+        input_d = (s['width'], s['height'])
+        output_d = self.scaleto(s['width'], s['height'])
+      img = Image.fromstring('RGB',input_d,buffer)
+      img = img.resize(output_d, Image.ANTIALIAS)
+      img.save(self.png_frame)
+      self.getShot=False
+
+  def scaleto(self, width, height):
+    width = int(self.height * (float(width) / height))
+    width = width - width%2
+    self.width = width
+    return (self.width, self.height)
+
+if __name__ == "__main__":
+  import sys
+  height = 128
+  inputFile = sys.argv[1]
+  outputFile = sys.argv[2]
+  offset = int(float(sys.argv[3]) * gst.MSECOND)
+  f = PosterStill(inputFile, outputFile, offset, height)