title: Common .mp4 codec format for web and mobile phones
body: <p>I have a website and mobile app(for iOS and Android) for e-learning. For web i am using JWPlayer. Many users reporting that they face video freezing or buffering issue.But i have checked in my chrome browser it only buffer even faster internet connection.<br/>
    So i want a common .mp4 codec format for both web and mobile(iOS &amp; Android) and suggest me a best video convertor for conversion.<br/>
  Thanks in advance. </p>