Hi all, I have written applications for UDP multicast server & client. On the client side I am writing the incoming UDP packets to a file. I am able to save the file successfully. But the saved file is not seekable. Where as the original file is seekable. Though for some files the +ve playback happens but not smoothly. But the -ve playback is still not happening in this case also. The file format contains H.264 video & AAC audio. Is there any method or algorithm from which I could save the file properly? P.S. : If I re-encode the saved file into original format the seeking happens smoothly. Thanks for any help.