/dev/video0からのpython再生出力

Question

私はpythonウィンドウでmplayerでファイルを再生するためにこのコードを使用しました。ファイルでは、それはうまくいきました（コメントアウトされていないパーツで）。しかし、今私はソース/ dev/video0からビデオを再生するためにそれを適応しようとしています。しかしそれで運がない。 私は何が間違っていますか？

マイコード：

#!/usr/bin/env python2 

import sys 
import os 
import subprocess 
import time 
import string 

import gtk 
import gobject 
import pygtk 

pygtk.require('2.0') 

class MPlayer: 
    def __init__(self, path, draw, show_output=True): 
#   self.path = path 
     self.draw = draw 
#   self.fifo = "/tmp/%s.%d" % (os.path.basename(__file__), time.time()) 

     # Start mplayer in draw 
     #cmd = string.split("mplayer -slave -wid %d -input file=%s" % \ 
     #  (self.draw.window.xid, self.fifo)) 
     #cmd = string.split("mplayer -slave -wid %d tv:// -tv device=/dev/video0 -hardframedrop" % \ 
     #cmd = string.split("mplayer -slave -wid %d -input file=%s" % \ 
     cmd = string.split("mplayer -slave -wid %d tv:// -tv device=/dev/video0 -hardframedrop" % \ 
       (self.draw.window.xid)) 
     #cmd.append(self.path) 
     if show_output: 
      process = subprocess.Popen(cmd) 
     else: 
      self.devnull = open(os.devnull) 
      process = subprocess.Popen(cmd, stdout=self.devnull, \ 
        stderr=self.devnull) 

     self.pid = process.pid 

#  def __enter__(self): 
#   os.mkfifo(self.fifo) 
#   return self 

#  def __exit__(self, ext_type, exc_value, traceback): 
#   if hasattr(self, "devnull"): 
#    self.devnull.close() 
#   os.unlink(self.fifo) 

    # Send cmd to mplayer via fifo 
    def exe(self, cmd, *args): 
     if not self.pid: return 
     full_cmd = "%s %s\n" % (cmd, string.join([str(arg) for arg in args])) 
#   with open(self.fifo, "w+") as fifo: 
#    fifo.write(full_cmd) 
#    fifo.flush() 

class MPlayerWrapper: 
    def __init__(self): 
     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL) 
     self.draw = gtk.DrawingArea() 
     self.mplayer = None 
     self.setup_widgets() 

    def setup_widgets(self): 
     self.window.connect("destroy", gtk.main_quit) 
     self.window.connect("key_press_event", self.key_press_event) 
     self.draw.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse("black")) 
     self.draw.connect("configure_event", self.redraw) 
     self.window.add(self.draw) 
     self.window.show_all() 

    def mplayer_exe(self, cmd, *args): 
     if self.mplayer: 
      self.mplayer.exe(cmd, *args) 

    def key_press_event(self, widget, event, data=None): 
     self.mplayer_exe("key_down_event", event.keyval) 

    def redraw(self, draw, event, data=None): 
     self.draw.queue_draw() 

    def play(self, path): 
     with MPlayer(path, self.draw, True) as self.mplayer: 
      gobject.child_watch_add(self.mplayer.pid, gtk.main_quit) 
      gtk.main() 

if __name__ == "__main__": 
    wrapper = MPlayerWrapper() 
    #wrapper.play(sys.argv[1]) 
    wrapper.play('') 

EDIT：ファイルvideo.mp4（Pythonのscript.pyのvideo.mp4）と の作業例：

#!/usr/bin/env python2 

import sys 
import os 
import subprocess 
import time 
import string 

import gtk 
import gobject 
import pygtk 

pygtk.require('2.0') 

class MPlayer: 
    def __init__(self, path, draw, show_output=True): 
     self.path = path 
     self.draw = draw 
     self.fifo = "/tmp/%s.%d" % (os.path.basename(__file__), time.time()) 

     # Start mplayer in draw 
     cmd = string.split("mplayer -slave -wid %d -input file=%s" % \ 
       (self.draw.window.xid, self.fifo)) 
     cmd.append(self.path) 
     if show_output: 
      process = subprocess.Popen(cmd) 
     else: 
      self.devnull = open(os.devnull) 
      process = subprocess.Popen(cmd, stdout=self.devnull, \ 
        stderr=self.devnull) 

     self.pid = process.pid 

    def __enter__(self): 
     os.mkfifo(self.fifo) 
     return self 

    def __exit__(self, ext_type, exc_value, traceback): 
     if hasattr(self, "devnull"): 
      self.devnull.close() 
     os.unlink(self.fifo) 

    # Send cmd to mplayer via fifo 
    def exe(self, cmd, *args): 
     if not self.pid: return 
     full_cmd = "%s %s\n" % (cmd, string.join([str(arg) for arg in args])) 
     with open(self.fifo, "w+") as fifo: 
      fifo.write(full_cmd) 
      fifo.flush() 

class MPlayerWrapper: 
    def __init__(self): 
     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL) 
     self.draw = gtk.DrawingArea() 
     self.mplayer = None 
     self.setup_widgets() 

    def setup_widgets(self): 
     self.window.connect("destroy", gtk.main_quit) 
     self.window.connect("key_press_event", self.key_press_event) 
     self.draw.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse("black")) 
     self.draw.connect("configure_event", self.redraw) 
     self.window.add(self.draw) 
     self.window.show_all() 

    def mplayer_exe(self, cmd, *args): 
     if self.mplayer: 
      self.mplayer.exe(cmd, *args) 

    def key_press_event(self, widget, event, data=None): 
     self.mplayer_exe("key_down_event", event.keyval) 

    def redraw(self, draw, event, data=None): 
     self.draw.queue_draw() 

    def play(self, path): 
     with MPlayer(path, self.draw, True) as self.mplayer: 
      gobject.child_watch_add(self.mplayer.pid, gtk.main_quit) 
      gtk.main() 

if __name__ == "__main__": 
    wrapper = MPlayerWrapper() 
    wrapper.play(sys.argv[1]) 

この例では、それはvideo.mp4をplayesし、/dev/video0を一緒にしてください。私はvideo.mp4を削除したいのでself.fifoの行にコメントしました。たぶん、これは間違っている...

Answer 1

私は解決策を見つけたと思う - ここDEV/video0 /からのビデオのための私のコードは

#!/usr/bin/env python2 

import sys 
import os 
import subprocess 
import time 
import string 

import gtk 
import gobject 
import pygtk 

pygtk.require('2.0') 

class MPlayer: 
    def __init__(self, draw): 
     self.draw = draw 
     self.fifo = "/tmp/%s.%d" % (os.path.basename(__file__), time.time()) 

     # Start mplayer in draw 
     cmd = string.split("mplayer -slave -wid %d tv:// -tv driver=v4l2:norm=PAL:width=640:height=480:outfmt=uyvy:device=/dev/video0 -hardframedrop -input file=%s" % \ 
       (self.draw.window.xid, self.fifo)) 

     self.devnull = open(os.devnull) 
     process = subprocess.Popen(cmd) 

     self.pid = process.pid 

    def __enter__(self): 
     os.mkfifo(self.fifo) 
     return self 

    def __exit__(self, ext_type, exc_value, traceback): 
     if hasattr(self, "devnull"): 
      self.devnull.close() 
     os.unlink(self.fifo) 

    # Send cmd to mplayer via fifo 
    def exe(self, cmd, *args): 
     if not self.pid: return 
     full_cmd = "%s %s\n" % (cmd, string.join([str(arg) for arg in args])) 
     with open(self.fifo, "w+") as fifo: 
      fifo.write(full_cmd) 
      fifo.flush() 

class MPlayerWrapper: 
    def __init__(self):   
     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL) 
     self.draw = gtk.DrawingArea() 
     self.mplayer = None 
     self.setup_widgets() 
     self.window.set_decorated(False) 
     self.window.resize(640,480) 
     self.window.set_position(gtk.WIN_POS_CENTER) 

     self.play() 

    def setup_widgets(self): 
     self.window.connect("destroy", gtk.main_quit) 
     self.window.connect("key_press_event", self.key_press_event) 
     self.draw.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse("black")) 
     self.draw.connect("configure_event", self.redraw) 
     self.window.add(self.draw) 
     self.window.show_all() 

    def mplayer_exe(self, cmd, *args): 
     if self.mplayer: 
      self.mplayer.exe(cmd, *args) 

    def key_press_event(self, widget, event, data=None): 
     self.mplayer_exe("key_down_event", event.keyval) 

    def redraw(self, draw, event, data=None): 
     self.draw.queue_draw() 

    def play(self):  
     with MPlayer(self.draw) as self.mplayer: 
      gobject.child_watch_add(self.mplayer.pid, gtk.main_quit) 


if __name__ == "__main__": 
    wrapper = MPlayerWrapper() 
    gtk.main()