vasquez
May 16th, 2008, 05:17 AM
I've been searching high and low for a way to solve this problem. basically i have to write a small GUI application that does several things.
1. Hook to a DV camera through firewire connection, use dvgrab to get the video and audio feed, pipe it in ffmpeg to do a real-time transconding in FLV format.
2. After CTRL+C to stop the 1st process a thumbnail is created.
3. Connect to a FTP server upload the FLV video and JPEG thumbnail file and add some entries to a MySQL database for easy online publishing.
In general that's about it, the only problem is that instead of sending CTRL+C command in console to stop transcoding i need a STOP button to do that. I used Glad to design a rather small GUI that helps the user to do just that. The only thing i need to do is figure out the threading mechanism and so far i had no success :( The record button works when pressed but hangs the entire GUI (typical :)) Any hints on how can i make all this stuff work together much appreciated!
Here's my code:
#!/usr/bin/env python
import sys, os, ftplib, time, datetime, MySQLdb
import gtk.glade
import threading
#---DATE TIME VARS---
TODAY = time.strftime("%m_%d_%y", time.localtime())
TIME_NOW = time.strftime("%H_%M_%S", time.localtime())
#---VARS---
ARRATE = "44100"
ABRATE = "128"
VBRATE = "400"
FPS = "25"
SIZE = "426x350"
FTP="ftp.address.com"
#---PATHS---
DVGRAB = "/usr/bin/dvgrab"
FFMPEG = "/usr/bin/ffmpeg"
#---OUTPUT DIR---
DIR = "/home/client/user-client/videos/"
REMOTE_DIR = "/home/server/www/website/video/"
VID_DIR = DIR+TODAY
FILE = TIME_NOW
class ClientGUI(threading.Thread):
def __init__(self):
self.wTree = gtk.glade.XML("client_gui.glade", "window1")
dic={ "on_window1_destroy" : self.quit,
"on_button1_clicked" : self.record,
"on_button2_clicked" : self.stop,
}
self.wTree.signal_autoconnect(dic)
return
def quit(self,obj):
#Handles the destroy signal of the window.
gtk.main_quit()
sys.exit(1)
def record(self,obj):
gtk.gdk.threads_enter()
#Handles the clicked signal of the button.
#CHECK IF DIRECTORY EXISTS, IF NOT CREATE IT
if not os.access(VID_DIR, os.F_OK):
print "Creating directory", VID_DIR
os.mkdir(VID_DIR)
print "Dumping"
PIPE = "%s --format raw -|%s -qmin 1 -qmax 3 -f dv -i - -ar %s -ab %s -acodec mp3 -ac 2 -r %s -f flv -b %s -s %s %s/%s.flv"
os.system(PIPE % (DVGRAB, FFMPEG, ARRATE, ABRATE, FPS, VBRATE, SIZE, VID_DIR, FILE))
gtk.gdk.threads_leave()
def stop(self,obj):
#Handles the clicked signal of the button.
print "Thumbnail creation"
THUMB = "%s -y -i %s/%s.flv -f mjpeg -ss 00:00:03 -r 1 -vframes 1 -s %s -an %s/%s.jpg"
os.system(THUMB % (FFMPEG, VID_DIR, FILE, SIZE, VID_DIR, FILE))
if __name__ == '__main__':
ClientGUI()
try:
gtk.gdk.threads_init()
except:
print "No threading was enabled when you compiled pyGTK!"
import sys
sys.exit(1)
gtk.gdk.threads_enter()
gtk.main()
gtk.gdk.threads_leave()
1. Hook to a DV camera through firewire connection, use dvgrab to get the video and audio feed, pipe it in ffmpeg to do a real-time transconding in FLV format.
2. After CTRL+C to stop the 1st process a thumbnail is created.
3. Connect to a FTP server upload the FLV video and JPEG thumbnail file and add some entries to a MySQL database for easy online publishing.
In general that's about it, the only problem is that instead of sending CTRL+C command in console to stop transcoding i need a STOP button to do that. I used Glad to design a rather small GUI that helps the user to do just that. The only thing i need to do is figure out the threading mechanism and so far i had no success :( The record button works when pressed but hangs the entire GUI (typical :)) Any hints on how can i make all this stuff work together much appreciated!
Here's my code:
#!/usr/bin/env python
import sys, os, ftplib, time, datetime, MySQLdb
import gtk.glade
import threading
#---DATE TIME VARS---
TODAY = time.strftime("%m_%d_%y", time.localtime())
TIME_NOW = time.strftime("%H_%M_%S", time.localtime())
#---VARS---
ARRATE = "44100"
ABRATE = "128"
VBRATE = "400"
FPS = "25"
SIZE = "426x350"
FTP="ftp.address.com"
#---PATHS---
DVGRAB = "/usr/bin/dvgrab"
FFMPEG = "/usr/bin/ffmpeg"
#---OUTPUT DIR---
DIR = "/home/client/user-client/videos/"
REMOTE_DIR = "/home/server/www/website/video/"
VID_DIR = DIR+TODAY
FILE = TIME_NOW
class ClientGUI(threading.Thread):
def __init__(self):
self.wTree = gtk.glade.XML("client_gui.glade", "window1")
dic={ "on_window1_destroy" : self.quit,
"on_button1_clicked" : self.record,
"on_button2_clicked" : self.stop,
}
self.wTree.signal_autoconnect(dic)
return
def quit(self,obj):
#Handles the destroy signal of the window.
gtk.main_quit()
sys.exit(1)
def record(self,obj):
gtk.gdk.threads_enter()
#Handles the clicked signal of the button.
#CHECK IF DIRECTORY EXISTS, IF NOT CREATE IT
if not os.access(VID_DIR, os.F_OK):
print "Creating directory", VID_DIR
os.mkdir(VID_DIR)
print "Dumping"
PIPE = "%s --format raw -|%s -qmin 1 -qmax 3 -f dv -i - -ar %s -ab %s -acodec mp3 -ac 2 -r %s -f flv -b %s -s %s %s/%s.flv"
os.system(PIPE % (DVGRAB, FFMPEG, ARRATE, ABRATE, FPS, VBRATE, SIZE, VID_DIR, FILE))
gtk.gdk.threads_leave()
def stop(self,obj):
#Handles the clicked signal of the button.
print "Thumbnail creation"
THUMB = "%s -y -i %s/%s.flv -f mjpeg -ss 00:00:03 -r 1 -vframes 1 -s %s -an %s/%s.jpg"
os.system(THUMB % (FFMPEG, VID_DIR, FILE, SIZE, VID_DIR, FILE))
if __name__ == '__main__':
ClientGUI()
try:
gtk.gdk.threads_init()
except:
print "No threading was enabled when you compiled pyGTK!"
import sys
sys.exit(1)
gtk.gdk.threads_enter()
gtk.main()
gtk.gdk.threads_leave()