The Google logo at Google headquarters in Mountain View.
The Google logo is shown during a news conference at Google headquarters in Mountain View, California January 5, 2010.Reuters

Google-powered latest mobile OS Android 4.4 Kitkat has reportedly marred the video playback performance on Nexus 7 device.

The Android 4.4 Kitkat OS update, first witnessed in Google Nexus 5, has already started rolling out in Nexus 7 and Nexus 4 devices via OTA (Over-The-Air).

OptoFidelity, a Finnish mobile video and touch testing firm, has also revealed some data to back the issue. The firm is said to have compared the performance of HD video playback in both 720p and 1080p at 30fps and 60fps on Nexus 7 (2012) and Nexus 7 (2013) handsets before and after the Kitkat update.

Surprisingly, it has been reported that the devices performed better with Android 4.3 Jelly bean OS, than the latest 4.4 Kitkat OS. Moreover it has been also noted that the nexus 7 (2013) couldn't even play any 60fps video after the update, according to Tech Crunch.

Based on the tests done by OptoFidelity, the classification level of both Nexus 7 devices dropped from delivering "satisfactory" to "unsatisfactory" range.

Some animation issues have also been reported post-Kitkat update along with more touch screen problems than before, which might be eliminated in future updates by Google.

Google Nexus 4 Issues

It has been also noted that not only Nexus 7, but Nexus 4 too has been also encountering lock screen, broken dialler, inactive home-button and other quick setting issues after the Android 4.4 Kitkat update.

Google has not yet addressed to these above mentioned problems, but a couple of workaround solutions have been mentioned here.

Google Nexus 5 Audio

Additionally Google's latest handset, Nexus 5, has been also facing problems regarding its audio.

It has been reported that over the last couple of weeks, Nexus 5 users have been complaining about the microphone output being extremely low when using wired headsets. Not only Nexus users, but even the user at the other end of the call is also facing the same issue, as reported by Information Week.

However, a workaround method has been revealed, which can solve the in-call problem. It is being said that holding down the middle headset button, while effectively connecting it to the Nexus 5's audio jack might eliminate the problem. But the user will be unable to pause music or end calls via the headset.