encode_timelapse.py

#!/usr/bin/python2.7
import getopt, sys, os

def fmt(fmt, dic):
  for k in dic:
    fmt = fmt.replace("{" + k + "}", str(dic[k]))
  return fmt

INFILE  = "*.png"
OUTFILE = "timelapse.avi"
AUDIO   = None
FPS     = 18
BITRATE = 7000

opts, args = getopt.getopt(sys.argv[1:], "hf:b:a:o:i:", ["help"])
for o, a in opts:
  if o == "-i": INFILE  = a
  if o == "-o": OUTFILE = a
  if o == "-a": AUDIO   = a
  if o == "-f": FPS     = float(a)
  if o == "-b": BITRATE = int(a)
  if o in ("-h", "--help"):
    print "usage:"
    print "  encode_timelapse.py [OPTIONS]"
    print 
    print "options:"
    print "  -i  infile     :%s" % INFILE
    print "  -o  outfile    :%s" % OUTFILE
    print "  -a  audiofile  :%s" % AUDIO
    print "  -f  fps        :%s" % FPS
    print "  -b  bitrate    :%s" % BITRATE
    exit()

cmdstr = fmt(
  'mencoder "mf://{infile}" -mf fps={fps} -o {outfile} -ovc lavc ' +
  '-lavcopts vcodec=mpeg4:vbitrate={bitrate} {audio}',
  {
    "infile"  : INFILE,
    "outfile" : OUTFILE,
    "fps"     : FPS,
    "bitrate" : BITRATE,
    "audio"   : ("-oac copy -audiofile %s" % AUDIO) if AUDIO else "",
  })

print(cmdstr)
os.system(cmdstr)

timelapse.py

#!/usr/bin/python2.7
 
import time, sys, os, subprocess
 
 
def get_current_workspace():
  """ Returns the integer ID of the currently active workspace """
  lines = subprocess.check_output(["wmctrl", "-d"]).split("\n")
  for i in range(len(lines)):
    if "*" in lines[i]:
      return i
  return 0
 
 
 
def get_arg(key, default=None):
  """ Tries to return the given program argument. Returns default if no value
  for this argument exists """
  args = sys.argv[1:]
  try:
    return args[args.index(key) + 1]
  except:
    return default 
   
 
 
def print_help():
  print "Usage: timelapse.py [OPTION]"
  print "Saves a screenshot at a given interval"
  print ""
  print "  --help  Display this help and exit"
  print "  -i      Interval in seconds"
  print "  -o      Output directory"
  print "  -x      Excluded workspaces, comma separated"
  print ""
  print "Example:"
  print " ./timelapse.py -i 5 -o abc -x 0,1"
  print ""
 
 
 
def main():
 
  if "--help" in sys.argv:
    print_help()
    exit()
 
 
  interval = int(get_arg("-i", "10"))
  output_dir = get_arg("-o", "out")
  excluded = [] if not get_arg("-x") else map(int, get_arg("-x").split(","))
   
  if not os.path.exists(output_dir):
    os.makedirs(output_dir)
  os.chdir(output_dir)
 
  print "Taking a screenshot every %d seconds and saving to '%s'..."\
    % (interval, output_dir)
 
 
  while 1:
    if get_current_workspace() in excluded:
      print "%s On excluded workspace, skipping capture..." % time.asctime()
 
    else:
      print "%s Capturing screen..." % time.asctime()
      os.system("scrot &")
 
    time.sleep(interval)
 
 
 
if __name__ == "__main__":
  main()