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subprojects/gst-python/old_examples/gstfile.py

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+#!/usr/bin/env python
+# -*- Mode: Python -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+# gstfile.py
+# (c) 2005 Edward Hervey <edward at fluendo dot com>
+# Discovers and prints out multimedia information of files
+
+# This example shows how to use gst-python:
+# _ in an object-oriented way (Discoverer class)
+# _ subclassing a gst.Pipeline
+# _ and overidding existing methods (do_iterate())
+
+import os
+import sys
+
+import gobject
+gobject.threads_init()
+
+import pygst
+pygst.require('0.10')
+
+from gst.extend.discoverer import Discoverer
+
+class GstFile:
+    """
+    Analyses one or more files and prints out the multimedia information of
+    each file.
+    """
+
+    def __init__(self, files):
+        self.files = files
+        self.mainloop = gobject.MainLoop()
+        self.current = None
+
+    def run(self):
+        gobject.idle_add(self._discover_one)
+        self.mainloop.run()
+
+    def _discovered(self, discoverer, ismedia):
+        discoverer.print_info()
+        self.current = None
+        if len(self.files):
+            print "\n"
+        gobject.idle_add(self._discover_one)
+        
+    def _discover_one(self):
+        if not len(self.files):
+            gobject.idle_add(self.mainloop.quit)
+            return False
+        filename = self.files.pop(0)
+        if not os.path.isfile(filename):
+            gobject.idle_add(self._discover_one)
+            return False
+        print "Running on", filename
+        # create a discoverer for that file
+        self.current = Discoverer(filename)
+        # connect a callback on the 'discovered' signal
+        self.current.connect('discovered', self._discovered)
+        # start the discovery
+        self.current.discover()
+        return False
+
+def main(args):
+    if len(args) < 2:
+        print 'usage: %s files...' % args[0]
+        return 2
+
+    gstfile = GstFile(args[1:])
+    gstfile.run()
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))