add rtmpdump wrapper

src/you_get/processor/__init__.py

@@ -3,3 +3,4 @@
 from .join_flv import concat_flv
 from .join_mp4 import concat_mp4
 from .ffmpeg import *
+from .rtmpdump import *

src/you_get/processor/rtmpdump.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+import os.path
+import subprocess
+
+def get_usable_rtmpdump(cmd):
+    try:
+        p = subprocess.Popen([cmd], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        out, err = p.communicate()
+        return cmd
+    except:
+        return None
+
+RTMPDUMP = get_usable_rtmpdump('rtmpdump')
+
+def has_rtmpdump_installed():
+    return RTMPDUMP is not None
+
+def download_rtmpdump_stream(url, playpath, title, ext, output_dir='.'):
+    filename = '%s.%s' % (title, ext)
+    filepath = os.path.join(output_dir, filename)
+
+    params = [RTMPDUMP, '-r']
+    params.append(url)
+    params.append('-y')
+    params.append(playpath)
+    params.append('-o')
+    params.append(filepath)
+
+    subprocess.call(params)
+    return