
Recherche avancée
Autres articles (21)
-
Liste des distributions compatibles
26 avril 2011, parLe tableau ci-dessous correspond à la liste des distributions Linux compatible avec le script d’installation automatique de MediaSPIP. Nom de la distributionNom de la versionNuméro de version Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
Si vous souhaitez nous aider à améliorer cette liste, vous pouvez nous fournir un accès à une machine dont la distribution n’est pas citée ci-dessus ou nous envoyer le (...) -
List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
Déploiements possibles
31 janvier 2010, parDeux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
Version mono serveur
La version mono serveur consiste à n’utiliser qu’une (...)
Sur d’autres sites (4967)
-
fftools/ffmpeg_filter : simplify choose_pix_fmts
25 octobre 2023, par Niklas Haasfftools/ffmpeg_filter : simplify choose_pix_fmts
The only meaningful difference between choose_pix_fmts and the default
code was the inclusion of an extra branch for `keep_pix_fmt` being true.However, in this case, we either :
1. Force the specific `ofp->format` that we inherited from
ofilter_bind_ost, or if no format was set :
2. Print an empty format listBoth of these goals can be accomplished by simply moving the decision
logic to ofilter_bind_ost, to avoid setting any format list when
keep_pix_fmt is enabled. This is arguably cleaner as it moves format
selection logic to a single function. In the case of branch 1, nothing
else needs to be done as we already force the format provided in
ofp->format, if any is set. Add an assertion to verify this assumption
just in case.(Side note : The "choose_*" family of functions are arguably misnomers,
as they should really be called "print_*" - their current behavior is to
print the relevant format lists to the `vf/af_format` filter arguments)Signed-off-by : Anton Khirnov <anton@khirnov.net>
Signed-off-by : Niklas Haas <git@haasn.dev> -
FFmpeg streaming UDP
2 octobre 2020, par xKedarI'm trying to stream, using FFmpeg, my webcam and audio to a PC in another LAN that connects to mine.


I basically wait for incoming connection in order to acquire IP and port of the other side


import socket

 localPort = 1234
 bufferSize = 1024

 UDPServerSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
 UDPServerSocket.bind(("", localPort)) # Bind to address and port

 while(True):
 bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
 message = bytesAddressPair[0].decode("utf-8")
 address = bytesAddressPair[1]
 # Sending a reply to client
 UDPServerSocket.sendto(str.encode("Hello"), address)
 break

 UDPServerSocket.close()



Then I try to send the stream with FFmpeg using the same port number both for server(localPort) and client(the one I acquired from address)


import re
 from threading import Thread
 from subprocess import Popen, PIPE

 def detect_devices():
 list_cmd = 'ffmpeg -list_devices true -f dshow -i dummy'.split()
 p = Popen(list_cmd, stderr=PIPE)
 flagcam = flagmic = False
 for line in iter(p.stderr.readline,''):
 if flagcam:
 cam = re.search('".*"',line.decode(encoding='UTF-8')).group(0)
 cam = cam if cam else ''
 flagcam = False
 if flagmic:
 mic = re.search('".*"',line.decode(encoding='UTF-8')).group(0)
 mic = mic if mic else ''
 flagmic = False
 elif 'DirectShow video devices'.encode(encoding='UTF-8') in line:
 flagcam = True
 elif 'DirectShow audio devices'.encode(encoding='UTF-8') in line:
 flagmic = True
 elif 'Immediate exit requested'.encode(encoding='UTF-8') in line:
 break
 return cam, mic 


 class ffmpegThread (Thread):
 def __init__(self, address):
 Thread.__init__(self)
 self.address = address

 def run(self):
 cam, mic = detect_devices()
 command = 'ffmpeg -f dshow -i video='+cam+':audio='+mic+' -profile:v high -pix_fmt yuvj420p -level:v 4.1 -preset ultrafast -tune zerolatency -vcodec libx264 -r 10 -b:v 512k -s 240x160 -acodec aac -ac 2 -ab 32k -ar 44100 -f mpegts -flush_packets 0 -t 40 udp://'+self.address+'?pkt_size=1316?localport='+str(localPort)
 p = Popen(command , stderr=PIPE)
 for line in iter(p.stderr.readline,''):
 if len(line) <5: break
 p.terminate()

 thread1 = ffmpegThread(address[0]+":"+str(address[1]))
 thread1.start()



While on the other side I have :


from threading import Thread
 import tkinter as tk
 import vlc

 class myframe(tk.Frame):
 def __init__(self, width=240, height=160):
 self.root = tk.Tk()
 super(myframe, self).__init__(self.root)
 self.root.geometry("%dx%d" % (width, height))
 self.root.wm_attributes("-topmost", 1)
 self.grid()
 self.frame = tk.Frame(self, width=240, height=160)
 self.frame.configure(bg="black")
 self.frame.grid(row=0, column=0, columnspan=2)
 self.play()
 self.root.mainloop()

 def play(self):
 self.player = vlc.Instance().media_player_new()
 self.player.set_mrl('udp://@0.0.0.0:5000')
 self.player.set_hwnd(self.frame.winfo_id())
 self.player.play()

 class guiThread (Thread):
 def __init__(self, nome):
 Thread.__init__(self)
 self.nome = nome

 def run(self):
 app = myframe()



and :


import socket

 msgFromClient = "Hello UDP Server"
 bytesToSend = str.encode(msgFromClient)
 serverAddressPort = ("MYglobal_IPaddress", 1234)
 bufferSize = 1024
 localPort = 5000

 # Create a UDP socket at client side
 UDPClientSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM) 
 UDPClientSocket.bind(("", localPort))

 UDPClientSocket.sendto(bytesToSend, serverAddressPort)

 msgFromServer = UDPClientSocket.recvfrom(bufferSize)
 msg = msgFromServer[0].decode("utf-8")
 print(msg)
 UDPClientSocket.close()
 gui = guiThread("ThreadGUI")
 gui.start()



I'm not able to reach the client with the stream. I tested everything else so the problem should be in the way I try to reach the client


-
How Many Default Languages ?
26 janvier 2012, par Multimedia Mike — ProgrammingI was thinking back to my childhood, when my family first owned a computer. It was an MS-DOS-powered IBM PC. The default OS came with 2 programming environments, such as they were : GW-BASIC and batch files. It was a start, I suppose. I guess most any microcomputer you can name from that era came with some kind of BASIC interpreter. That defined the computer’s “out of the box” programmability.
Then I started wondering how this compares to computers (operating systems/distributions, really) these days. So I installed a fresh version of the latest Ubuntu Linux version (11.10 as of this writing ; x86_32) and looked for programmability (without installing anything else). This is what I came up with :
- gcc/C (only the C compiler ; other components of the GNU compiler collection are installed separately)
- Perl
- Python
- C#, as furnished by Mono
- Bash — can’t forget about the shell as a full-featured programming language (sh is also present, but not t/csh)
- JavaScript — since Firefox is installed per default, JS counts
- GNU Assember — thanks to Reimar for the reminder that if gcc is present, gas necessarily needs to be there as well
I checked on C++, Objective C, Java, Ada, Fortran, Go, Lua, Ruby, Tcl, PHP, R and other languages I could think of, but the above items were the only ones present by default. At the same time, I checked my Mac OS X (10.6) box and it also has Ruby and PHP installed. It has a bunch of other languages, courtesy of Xcode, so I can’t certify anything about its out of the box programmability.
Still, I think “embarrassment of riches” pretty well sums it up. I try not to be crotchety old fogey complaining that kids these days don’t know how good they have it ; rather, I’m genuinely excited for anyone who wants to leap into computer programming in this day and age.