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Feb 27th, 2009
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Image to Video Converter Code Snippet

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Does anyone here have a wxPython code that converts a folder of images to a .wmv file just by clicking a button?

What I did in my program was I load an Image-to-Video Converter Software by clicking a button but I feel that it would be better if I can directly convert the images to a video just by clicking the button.

Hope someone can help me out here. Thanks so much.

-Karen
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karenmaye is offline Offline
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Feb 27th, 2009
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Re: Image to Video Converter Code Snippet

Interesting concept. Two potential problems:

(1) What if the images are not all the same size?

(2) How does the code decide what framerate to use?

Jeff
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Feb 27th, 2009
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Re: Image to Video Converter Code Snippet

Hi Jeff,

In the Image-to-Video software that I am using, the size of the images does not matter and the frame rate is set by the user. So I was thinking, I can just set the frame rate to be fixed say 5 frames/sec so when the button is clicked, it will automatically convert the images to video. However, I can also add that feature to my GUI such that when the button is clicked, it will ask for the desired frame rate first before actually converting. But I guess that will make things more complicated because to begin with, I have no idea how the conversion code should look like.

-Karen
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Re: Image to Video Converter Code Snippet

The last PyMedia release I saw was for Python24:
http://downloads.sourceforge.net/pym...e_mirror=voxel
However, it is possible to create a video with it from within a Python program. Here is an example called make_video.py they list at
http://downloads.sourceforge.net/pym...irror=internap
...
python Syntax (Toggle Plain Text)
  1. #! /bin/env python
  2. import sys, os, time
  3. import pymedia.video.vcodec as vcodec
  4. import pygame
  5.  
  6. def makeVideo( inPattern, outFile, outCodec ):
  7.   # Get video stream dimensions from the image size
  8.   pygame.init()
  9.   i= 1
  10.   # Opening mpeg file for output
  11.   e= None
  12.   i= 1
  13.   fw= open( outFile, 'wb' )
  14.   while i:
  15.     if os.path.isfile( inPattern % i ):
  16.       s= pygame.image.load( inPattern % i )
  17.       if not e:
  18.         if outCodec== 'mpeg1video':
  19.           bitrate= 2700000
  20.         else:
  21.           bitrate= 9800000
  22.  
  23.         params= { \
  24.           'type': 0,
  25.           'gop_size': 12,
  26.           'frame_rate_base': 125,
  27.           'max_b_frames': 0,
  28.           'height': s.get_height(),
  29.           'width': s.get_width(),
  30.           'frame_rate': 2997,
  31.           'deinterlace': 0,
  32.           'bitrate': bitrate,
  33.           'id': vcodec.getCodecID( outCodec )
  34.         }
  35.         print 'Setting codec to ', params
  36.         e= vcodec.Encoder( params )
  37.         t= time.time()
  38.  
  39.       # Create VFrame
  40.       ss= pygame.image.tostring(s, "RGB")
  41.       bmpFrame= vcodec.VFrame( vcodec.formats.PIX_FMT_RGB24, s.get_size(), (ss,None,None))
  42.       yuvFrame= bmpFrame.convert( vcodec.formats.PIX_FMT_YUV420P )
  43.       d= e.encode( yuvFrame )
  44.       fw.write( d.data )
  45.       i+= 1
  46.     else:
  47.       print '%d frames written in %.2f secs( %.2f fps )' % ( i, time.time()- t, float( i )/ ( time.time()- t ) )
  48.       i= 0
  49.  
  50.   fw.close()
  51.   pygame.quit()
  52.  
  53.  
  54. if __name__== '__main__':
  55.   if len( sys.argv )!= 4:
  56.     print "Usage: make_video <in_file_pattern> <out_file> <format>\n\tformat= { mpeg1video | mpeg2video }"
  57.   else:
  58.     makeVideo( sys.argv[ 1 ], sys.argv[ 2 ], sys.argv[ 3 ] )
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Mar 19th, 2009
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Re: Image to Video Converter Code Snippet

I tried running make_video.py by including it in my main code but I can't seem to make it work. Here's the code. The error says that not all arguments converted during string formatting at this line:
if os.path.isfile( inPattern % i ):

Can someone please help me? Can this program convert .jpg images to a video assuming that all images have the same size and the fps is set to be 0.5 ?

Thank you so much.

self.Bind(wx.EVT_BUTTON, self.makeVideo, self.ConverterButton)

def makeVideo(self, evt):

outFile = 'C:/Documents and Settings/12345/Desktop/nyeh.mpg'
inPattern = 'C:/Documents and Settings/12345/My Documents/Files/ACADEMICS/ECE 198/GUI/cam_pics'
outCodec = 'mpeg1video'

# Get video stream dimensions from the image size
pygame.init()
i= 1
# Opening mpeg file for output
e= None
i= 1
fw= open( outFile, 'wb' )

while i:
if os.path.isfile( inPattern % i ):
s= pygame.image.load( inPattern % i )
if not e:
if outCodec== 'mpeg1video':
bitrate= 2700000
else:
bitrate= 9800000

params= { \
'type': 0,
'gop_size': 12,
'frame_rate_base': 10,
'max_b_frames': 0,
'height': s.get_height(),
'width': s.get_width(),
'frame_rate': 2997,
'deinterlace': 0,
'bitrate': bitrate,
'id': vcodec.getCodecID( outCodec )
}

print 'Setting codec to ', params
e= vcodec.Encoder( params )
t= time.time()

# Create VFrame

ss= pygame.image.tostring(s, "RGB")
bmpFrame= vcodec.VFrame( vcodec.formats.PIX_FMT_RGB24, s.get_size(), (ss,None,None))
yuvFrame= bmpFrame.convert( vcodec.formats.PIX_FMT_YUV420P )
d= e.encode( yuvFrame )
fw.write( d.data )
i+= 1

else:
print '%d frames written in %.2f secs( %.2f fps )' % ( i, time.time()- t, float( i )/ ( time.time()- t ) )
i= 0

fw.close()
pygame.quit()
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Mar 19th, 2009
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Re: Image to Video Converter Code Snippet

Karen,

Please use code tags when posting code, or else it will become unreadable as it has above.

To use the code tags, wrap your code like this:
[code=python]
# Code inside here
[/code]

This will turn on syntax highlighting and preserve your indentation. Also, forum members are much more inclined to help you if your post isn't a huge mess of plain text.
Last edited by jlm699; Mar 19th, 2009 at 9:14 am.
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Re: Image to Video Converter Code Snippet

Thanks Jim. Here it is. I am not sure if I correctly set inPattern and outFile that's why the code isn't working. Hope someone can help me. Thanks.

python Syntax (Toggle Plain Text)
  1. self.Bind(wx.EVT_BUTTON, self.makeVideo, self.ConverterButton)
  2.  
  3. def makeVideo(self, evt): #make_video.py
  4.  
  5. outFile = 'C:/Documents and Settings/12345/Desktop/nyeh.mpg'
  6. inPattern = 'C:/Documents and Settings/12345/My Documents/Files/ACADEMICS/ECE 198/GUI/cam_pics'
  7. outCodec = 'mpeg1video'
  8.  
  9. # Get video stream dimensions from the image size
  10. pygame.init()
  11. i= 1
  12. # Opening mpeg file for output
  13. e= None
  14. i= 1
  15. fw= open( outFile, 'wb' )
  16.  
  17. while i:
  18. if os.path.isfile( inPattern % i ):
  19. s= pygame.image.load( inPattern % i )
  20. if not e:
  21. if outCodec== 'mpeg1video':
  22. bitrate= 2700000
  23. else:
  24. bitrate= 9800000
  25.  
  26. params= { \
  27. 'type': 0,
  28. 'gop_size': 12,
  29. 'frame_rate_base': 10,
  30. 'max_b_frames': 0,
  31. 'height': s.get_height(),
  32. 'width': s.get_width(),
  33. 'frame_rate': 2997,
  34. 'deinterlace': 0,
  35. 'bitrate': bitrate,
  36. 'id': vcodec.getCodecID( outCodec )
  37. }
  38.  
  39. print 'Setting codec to ', params
  40. e= vcodec.Encoder( params )
  41. t= time.time()
  42.  
  43. # Create VFrame
  44.  
  45. ss= pygame.image.tostring(s, "RGB")
  46. bmpFrame= vcodec.VFrame( vcodec.formats.PIX_FMT_RGB24, s.get_size(), (ss,None,None))
  47. yuvFrame= bmpFrame.convert( vcodec.formats.PIX_FMT_YUV420P )
  48. d= e.encode( yuvFrame )
  49. fw.write( d.data )
  50. i+= 1
  51.  
  52. else:
  53. print '%d frames written in %.2f secs( %.2f fps )' % ( i, time.time()- t, float( i )/ ( time.time()- t ) )
  54. i= 0
  55.  
  56. fw.close()
  57. pygame.quit()
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Re: Image to Video Converter Code Snippet

Thanks Jim. Here it is. I am not sure if I correctly set inPattern and outFile that's why the code isn't working. Hope someone can help me. And can make_video.py convert a folder of .jpg images to a .mpg video file?

python Syntax (Toggle Plain Text)
  1. self.Bind(wx.EVT_BUTTON, self.makeVideo, self.ConverterButton)
  2.  
  3. def makeVideo(self, evt): #make_video.py
  4.  
  5.      outFile = 'C:/Documents and Settings/12345/Desktop/nyeh.mpg'
  6.      inPattern = 'C:/Documents and Settings/12345/My Documents/Files/ACADEMICS/ECE 198/GUI/cam_pics'
  7.      outCodec = 'mpeg1video'
  8.  
  9.      # Get video stream dimensions from the image size
  10.      pygame.init()
  11.      i= 1 
  12.     # Opening mpeg file for output
  13.      e= None
  14.      i= 1
  15.      fw= open( outFile, 'wb' )
  16.  
  17.      while i:
  18.          if os.path.isfile( inPattern % i ):
  19.             s= pygame.image.load( inPattern % i )
  20.                 if not e:
  21.                     if outCodec == 'mpeg1video':
  22.                        bitrate= 2700000    
  23.                     else: 
  24.                        bitrate= 9800000
  25.  
  26.                     params= { \
  27.                        'type': 0,
  28.                        'gop_size': 12,
  29.                        'frame_rate_base': 10, 
  30.                        'max_b_frames': 0,
  31.                        'height': s.get_height(),
  32.                        'width': s.get_width(),
  33.                        'frame_rate': 2997,
  34.                        'deinterlace': 0,
  35.                        'bitrate': bitrate,
  36.                        'id': vcodec.getCodecID( outCodec )
  37.                         }
  38.  
  39.                     print 'Setting codec to ', params
  40.                     e= vcodec.Encoder( params )
  41.                     t= time.time()
  42.  
  43.            # Create VFrame
  44.  
  45.                 ss= pygame.image.tostring(s, "RGB")
  46.                 bmpFrame= vcodec.VFrame(vcodec.formats.PIX_FMT_RGB24, s.get_size(), (ss,None,None))
  47.                 yuvFrame= bmpFrame.convert(vcodec.formats.PIX_FMT_YUV420P)
  48.                 d= e.encode( yuvFrame )
  49.                 fw.write( d.data )
  50.                 i+= 1
  51.  
  52.          else:
  53.                 print '%d frames written in %.2f secs( %.2f fps )' % (i,time.time()- t, float( i )/(time.time()- t))
  54.                 i= 0
  55.  
  56.      fw.close()
  57.      pygame.quit()
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Re: Image to Video Converter Code Snippet

Running PyGame from within wxPython will create a conflict, since each use their own event loops, and the event queue will now contain events that won't match.
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