Difference between ANYFORMAT and ANYFORMAT_RTP

I want to know what's the difference in use between 2 formats, eg JPEG and JPEG_RTP. when do I choose the 开发者_如何学运维format ended in "_RTP"?

Thank's for help. Regards!

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The RTP packet format is optimized for real-time video streams where codec parameters change rarely from frame to frame. (compare to M-JPEG over HTTP)

See RFC 2435