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gmyth-stream/server/0.2/plugins/transcoders/gmencoder.py
author renatofilho
Mon Aug 13 22:29:00 2007 +0100 (2007-08-13)
branchtrunk
changeset 800 2b1824e138b1
parent 672 4e623a4274a1
permissions -rw-r--r--
[svn r806] created a new method for transcode files 
     1 import os

     2 import shlex

     3 import signal

     4 import subprocess

     5 import time

     6 

     7 import select

     8 

     9 import lib.utils as utils

    10 import lib.server as server

    11 

    12 __all__ = ("TranscoderGMencoder",)

    13 

    14 class TranscoderGMencoder(server.Transcoder):

    15     gmencoder_path = utils.which("gmencoder")

    16     name = "gmencoder"

    17     priority = -1

    18     proc = None

    19 

    20     def __init__(self, params):

    21         server.Transcoder.__init__(self, params)

    22         self.opts = []

    23     # __init__()

    24 

    25     def _insert_param (self, name, value):

    26         if (value != ""):

    27             self.opts.append(name)

    28             self.opts.append(value)

    29 

    30     def _parser_params (self):

    31         self._insert_param("-i", \

    32             "%s://%s" % (self.params_first("type", "file"), self.params_first("uri", "")))

    33         self._insert_param("--video-encode", self.params_first("ve", ""))

    34         self._insert_param("--video-opts", "bitrate=200,pass=2,quantizer=5")

    35         self._insert_param("--video-fps", self.params_first("fps", ""))

    36         self._insert_param("--video-width", self.params_first("width", ""))

    37         self._insert_param("--video-height", self.params_first("height", ""))

    38         self._insert_param("--audio-rate", "32000")

    39         self._insert_param("--audio-encode", self.params_first("ae", ""))

    40     # _parse_params

    41 

    42     def start(self, outfd):

    43         self.opts.append (self.gmencoder_path)

    44         self._parser_params ()

    45         self._insert_param ("-o", "fd://%d" % outfd.fileno())

    46 

    47         cmd = " ".join(self.opts)

    48         self.log.info ("GMencoder: %s", cmd)

    49 

    50         try:

    51             self.proc = subprocess.Popen(self.opts, stdin=subprocess.PIPE, stdout=subprocess.PIPE)

    52         except Exception, e:

    53             self.log.error("Error executing GMencoder: %s" % e)

    54             return False

    55 

    56         try:

    57 			while (self.proc and self.proc.poll() == None):

    58 				r, w, x = select.select([self.proc.stdout], [], [], 0)

    59 				if self.proc.stdout in r:

    60 					progress = self.proc.stdout.readline()

    61 					self.log.info ("stdout %s" % progress)

    62 					if (progress.find ("PROGRESS") >= 0):

    63 						self.status = progress.split (":")[1]

    64 					#if (progress.find ("DONE") >= 0):

    65 					#	break

    66 			self.log.info ("Process exit")

    67         except Exception, e:

    68             self.log.error("Problems handling data: %s" % e)

    69             return False

    70 

    71         return True

    72     # start()

    73 

    74 

    75     def stop(self):

    76         if self.proc:

    77             self.log.info ("STOPED GMencoder plugin")

    78             try:

    79                 self.proc.stdin.write ("QUIT\n")

    80             except Exception, e:

    81                 pass

    82 

    83             try:

    84                 self.proc.wait()

    85             except Exception, e:

    86                 pass

    87 

    88             self.proc = None

    89     # stop()

    90 

    91 # TranscoderGMencoder
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