I had to use Google annotation charts and connect them through mysql database.Google was able to handle only JSON format. JSON format was new for me and the task was really tedious as this was just a small part of the project I had to do lot of calculations and make it really dynamic. I wanted a quicker solution. I found Gvstreamer as the recommended site in Google Developer guide for annotation tool. GvStreamer is simply perfect and saved me lot of time in writing a json format myself. I would really recommend it for a quick and reliable solution.
Meenal Chhabra, s/w engineer and freelancer