convert_video.py

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