Hi, Can anyone inform about how to make use of FFMPEG APIs with x264 library. I have integrated the x264 library with FFMPEG, and could successfully find the encoder through avcodec_find_encoder. But after i give input to avcodec_encode_video(), the rtp_callback function(registered through AVCODECCONTEXT structure) is not being called. Hence forth I dont get the output data.. Can anyone please tell me what is that i might be missing..Is it because my configuration options are not proper.. Thanks and Regards, Dhruva The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments contained in it.