HMS

commit 1d91890d43f0b3a7b7a6aa39ef6b4a6e32b11c89
parent 573933e03ed05858d7196472f1b0a1c5732d3aeb
Author: Brian C. Lane <bcl@brianlane.com>
Date:   Sat, 19 Feb 2011 08:31:04 -0800

Fix interval calculation and add offset to first image

Diffstat:
M
scripts/makebif.py
 | 
19
+++++++++----------

1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/scripts/makebif.py b/scripts/makebif.py
@@ -1,7 +1,7 @@
 #!/bin/env python
 """
 Create .bif files for Roku video streaming
-Copyright 2009 by Brian C. Lane <bcl@brianlane.com>
+Copyright 2009-2011 by Brian C. Lane <bcl@brianlane.com>
 All Rights Reserved
 
 
@@ -9,9 +9,6 @@ makebif.py --help for arguments
 
 Requires ffmpeg to be in the path
 
-After creating the .bif files run the staticvideo.py script to regenerate XML with the
-URLs for the bif files included.
-
 NOTE: The jpg image sizes are set to the values posted by bbefilms in the Roku
       development forums. They may or may not be correct for your video aspect ratio.
       They don't look right for me when I set the video height to 480
@@ -60,17 +57,17 @@ def getMP4Info(filename):
     return details
 
 
-def extractImages( videoFile, directory, interval, mode=0 ):
+def extractImages( videoFile, directory, interval, mode=0, offset=0 ):
     """
     Extract images from the video at 'interval' seconds
 
     @param mode 0=SD 4:3 1=HD 4:3 2=SD 16:9 3=HD 16:9
     @param directory Directory to write images into
     @param interval interval to extract images at, in seconds
-
+    @param offset offset to first image, in seconds
     """
     size = "x".join([str(i) for i in videoSizes[mode]])
-    cmd = "ffmpeg -i %s -ss 7 -r %0.2f -s %s %s/%%08d.jpg" % (videoFile, interval/100.0, size, directory)
+    cmd = "ffmpeg -i %s -ss %d -r %0.2f -s %s %s/%%08d.jpg" % (videoFile, offset, 1.00/interval, size, directory)
     print cmd
     p = Popen( cmd, shell=True, stdout=PIPE, stdin=PIPE)
     (stdout, stderr) = p.communicate()
@@ -136,9 +133,11 @@ def main():
                         help="(0=SD) 4:3 1=HD 4:3 2=SD 16:9 3=HD 16:9")
     parser.add_option(  "-i", "--interval", dest="interval", type='int', default=10,
                         help="Interval between images in seconds (default is 10)")
+    parser.add_option(  "-o", "--offset", dest="offset", type='int', default=7,
+                        help="Offset to first image in seconds (default is 7)")
 
     (options, args) = parser.parse_args()
-    
+
     # Get the video file to operate on
     videoFile = args[0]
     print "Creating .BIF file for %s" % (videoFile)
@@ -156,13 +155,13 @@ def main():
     tmpDirectory = tempfile.mkdtemp()
 
     # Extract jpg images from the video file
-    extractImages( videoFile, tmpDirectory, options.interval, options.mode )
+    extractImages( videoFile, tmpDirectory, options.interval, options.mode, options.offset )
 
     bifFile = "%s-%s.bif" % (os.path.basename(videoFile).rsplit('.',1)[0], modeExtension[options.mode])
 
     # Create the BIF file
     makeBIF( bifFile, tmpDirectory, options.interval )
-    
+
     # Clean up the temporary directory
     shutil.rmtree(tmpDirectory)