[FIXED] How to improve OpenCV and python VideoWriter resolution?

Issue

I have a script which uses OpenCV and python and creates a video ( avi format ) from a set of png images.

The resolution of these images is good.

The problem is that the resolution of the resulting video is very low.

How can I improve the resolution?

Is the low resolution related to the images format?

CODE:

writer  = cv2.VideoWriter( "C:\Users\.../demo3_4.avi", -1, 1, ( width, height ) )
nFrames = 24

for i in range( 1, nFrames ):
    img   = cv2.imread( os.path.join( str( inf ), "colorraster%d.jpg"%i ) )
    writer.write( img )

cv2.destroyAllWindows()  
writer.release()

Solution

According to the documentation, cv2.VideoWriter has fourcc parameter which specifies the codec, used to compress the frames. You are now specifying '-1' which means some default codec. I would suggest experimenting with different codecs from that list and see what gives the best result.

Update: To translate the codec into an int, the docs recommend this: CV_FOURCC('P','I','M','1') if you wanted to try codec PIM1.

Answered By - Ashalynd