convert raw uyvy data captured by v4l2 devices to rgb bitmap file

convert_uyvy.py

#!/usr/bin/python2
import numpy as np 
import cv2
import sys
import os


if len(sys.argv) < 2:
    print 'nope ...\nusage:'+sys.argv[0]+' file_name\n\n'

for fname in sys.argv[1:]:
    with open(fname,'rb') as f:
        try:
            print 'trying '+fname+' ...'
            uyvyb = f.read()
            uyvy = [ord(b) for b in uyvyb]
            uyvyarr = zip(*[iter(zip(*[iter(uyvy)]*2))]*1280*2)
            yuvnp = np.array(uyvyarr,'uint8')
            img = cv2.cvtColor(yuvnp,cv2.COLOR_YUV2BGR_UYVY)
            wfname = fname+'.bmp'
            print 'convert '+fname+' successfully.  writing to ' + wfname + '...'
            cv2.imwrite(wfname,img)
            os.unlink(fname)
            print 'done.'
            try:
                from PIL import Image
                with Image.open(wfname) as img:
                    cw = img.width / 2
                    ch = img.height / 2
                    regions = ((0,0,cw,ch),(cw,0,cw*2,ch),(0,ch,cw,ch*2),(cw,ch,cw*2,ch*2))
                    for idx,i in enumerate(map(img.crop,regions)):
                        s = wfname[:-4]+'_crop_'+str(idx)+'.bmp'
                        i.save(s)
                        print 'saved '+s
            except:
                print 'crop '+wfname+' failed..'              
           
                
        except:
            print fname+' ...failed'