keyframes.vpy

#!/usr/bin/env python3

import os, sys
import vapoursynth as vs

def progress( current_frame, total_frames ):
	print( "\rProgress: {0}/{1}".format( current_frame, total_frames ), file=sys.stderr, end='' )

core = vs.get_core( )

# SystemPluginDir=/usr/local/lib
core.std.LoadPlugin( 'libffms2.3.dylib' )
core.std.LoadPlugin( 'libscxvid.dylib' )

input_video = os.path.abspath( sys.argv[1] )

vid = core.ffms2.Source( input_video, cachefile='/tmp/keyframe.index' )
vid = core.resize.Bicubic( vid, format=vs.YUV420P8 )
vid = core.scxvid.Scxvid( vid, input_video[0:-3] + 'scxvid' )

devnull = open( '/dev/null', 'w' )

vid.output( devnull, y4m=False, progress_update=progress )
print( '', file=sys.stderr )