convert_video.py

   1 #!/usr/bin/python
   2
   3 import os, sys, subprocess
   4
   5 SRC_DIR = "/home/douglas/sparrow/content/dv/late/"
   6 DEST_DIR = "/home/douglas/sparrow/content/mjpeg/"
   7 #for double frames
   8 DF_DEST_DIR = "/home/douglas/sparrow/content/mjpeg_df/"
   9
  10 WIDTH = 800
  11 HEIGHT = 600
  12 CROP_RIGHT = 32
  13 CROP_TOP = 24
  14 PRE_CROP_RIGHT = 28
  15 PRE_CROP_TOP = 21
  16
  17 CROP = False
  18
  19 def do_one(src, dest, df=False):
  20     if df:
  21         yadif_mode = 1
  22         fps_list = ['-fps', '50', '-ofps', '50']
  23     else:
  24         yadif_mode = 0
  25         fps_list = []
  26
  27     if CROP:
  28         vf = ("yadif=%d,hqdn3d,scale=%d:%d,crop=%d:%d:%d:%d" %
  29               (yadif_mode, WIDTH + CROP_RIGHT, HEIGHT + CROP_TOP,
  30                WIDTH, HEIGHT, 0, CROP_TOP))
  31     else:
  32         vf = ("yadif=%d,hqdn3d,scale=%d:%d" %
  33               (yadif_mode, WIDTH, HEIGHT))
  34
  35
  36     cmd = ["mencoder",
  37            "-demuxer", "lavf",
  38            src,
  39            "-o", dest,
  40            "-nosound",
  41            "-ovc", "lavc",
  42            "-lavcopts", "vcodec=mjpeg",
  43            "-vf", vf,
  44            ] + fps_list
  45
  46     subprocess.check_call(cmd)
  47
  48 if 0:
  49     do_one(SRC_DIR + "sparrow-1-3-4-12-14145.dv",
  50            DEST_DIR + "sparrow-1-3-4-12-14145-precrop.avi")
  51     sys.exit()
  52
  53 def go(df=False):
  54     if df:
  55         destdir = DF_DEST_DIR
  56     else:
  57         destdir = DEST_DIR
  58     for src in os.listdir(SRC_DIR):
  59         dest = destdir + src + '-late.avi'
  60         src = SRC_DIR + src
  61         do_one(src, dest, df)
  62
  63
  64 #go(df=False)
  65 go(df=True)
  66
  67
  68
  69 #hqdn3d=4:3:6 [:6*3/4  == 4]
  70