Video sequences with Flickering

I am implementing a tool for flicker r开发者_如何学Pythonemoval from Video. To test the tool, I am looking to get some Video Sequences(Any video format - MPEG4,H263,MPEG2,H264,Raw YUV) which have noticable amount of flickering present in them. I searched, but could not find any such videos.

BTW are there known Video post processing tools which allow flicker removal?

Any pointers would help.

thank you. -AD

If you have a YUV-sequence, it would be quite simple to add artificial flickering at a certain period (50 Hz, 60 Hz or whatever) by either insert a white frame at the period in question or you can fiddle with the chroma-plane making the frame in question lighter.

Test sequences can be found here. yuv test-sequences

BTW. Normally mobile phones have built in flicker removal that works quite well that operates at a multiple of the net frequency. Slow motion video record at a frame rate not an multiple of say 25 or 30 Hz is something that some camera modules fails to compensate for when recording @ say VGA 100 fps.

Here is a python function to get you started that splits a YUV 4:2:0 into frames and stores each frame as a separate file.

def split(fname):
    src_yuv = open(fname, 'rb')

    cif = 352*288*1.5   # YUV 4:2:0 change to reflect your input!

    # Get file size in bytes
    src_yuv_size = os.stat(fname)[6]

    nr_files = src_yuv_size / cif

    filecnt = 0
    while True:
        buf = src_yuv.read(cif)          # read qcif number of bytes
        if buf:
            s = "frame" + "%s" % filecnt + ".yuv"
            dst_yuv = open(s, 'wb')
            dst_yuv.write(buf)           # write read data into new file
            print "writing frame", filecnt
            dst_yuv.close()
            filecnt = filecnt + 1
        else:
            break
    src_yuv.close()