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Cisco TelePresence MCU 4200 Series

Pink and green patches in a video stream

Why do I see pink or green patches in my video stream with Cisco acquired Codian products or Cisco TelePresence Serial Gateway Series products?

Pink and green patches or lines seen in decoded video are often the result of packet loss or incorrect data in the video stream. Many video codecs (including H.261, H.263 and H.264) use the Y'CbCr system to represent color space, where Y' is the 'luma' (brightness) component and Cb and Cr are the blue and red chroma components respectively. For many Y'CbCr values there is no equivalent RGB value and the colour seen on the display depends on the details of the algorithm used. A Y'CbCr value of (0,0,0) is often converted into the green color while a Y'CbCr value of (255,255,255) leads to a pink color.

If you encounter the symptoms described above, follow normal packet loss and network troubleshooting procedures.

This article applies to the following products:

  • Cisco TelePresence IP GW 3500 / MSE IPGW blade
  • Cisco TelePresence IP VCR 2200 / MSE VCR blade
  • Cisco TelePresence ISDN GW 3200 and 3241 / MSE 8310 and 8321 ISDN blades
  • Cisco TelePresence MCU 4200 / MSE 8420
  • Cisco TelePresence MCU 4500
  • Cisco TelePresence MSE 8510 blade
  • Cisco TelePresence Serial GW 3340 / MSE 8330 blade

May 11th, 2012 TAA_KB_136