Video output mp4 having issue playing in windows media player, ubuntu player and html5 player

Hi Rudresh,
We are using your code to compress videos for mp4 output. The resulted video is not playing in Ubuntu default player throwing the following error "No valid frames decoded before end of stream". In windows media player, only the audio plays with blank video, and the same does not play in Html5 player.

Can you help us debug this issue?]