$ python -c "import urllib; print urllib.unquote('http%3A%2F%2Flive.pgmedia.ir%3A1935%2Flive-35895787%2Fsahartv1-1024.sdp%2Fmanifest.f4m%3FDVR')"
http://live.pgmedia.ir:1935/live-35895787/sahartv1-1024.sdp/manifest.f4m?DVR