# H264/AVC composition time **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [December 14, 2009, 12:43pm UTC](https://community.wowza.com/t/h264-avc-composition-time/487 "2009-12-14T12:43:13Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![erwin\_davis](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@erwin\_davis](https://community.wowza.com/u/erwin_davis)\ **Post date:** [December 15, 2009, 11:21am UTC](https://community.wowza.com/t/h264-avc-composition-time/487/9 "2009-12-15T11:21:33Z")
After reading through the userguide 2.0 and the posts from the forum, I think I can use the sample from [http://community.wowza.com/t/-/46](http://community.wowza.com/t/-/46) to receive the audio/video stream over RTP and send it over RTMP with Wowza rtp live encoder to the flash client. I will go ahead to test this feature. two question ons this, (1) in the AV RTP stream, video and audio are in seperate ports. Currently in our A/V RTP stream, video codec is H264 and audio codec are Speex/PCMU. Does the wowza RTP live encoder support those video/audio codecs? Any other other A/V codecs are supported in currently wowza 2.0. [Quick Update, I followed the link above to play a audio stream with speex, I didnot hear any sound. I didnot see any error in parsing SDP file from server log. Any thoughts?] (2) In the other direction, from the flash client to RTP servers. Is there any live encoder to encode/convert the A/V stream over RTMP into another A/V stream over RTP to a remote RTP server. I didnot find out the info from either the userGuide or the forum. Currently I have to retrieve the raw A/V packets from RTPM stream and maunally send them out over RTP. I wonder if there may exist an easy solution. Thansk a lot, --- _[View the full topic](https://community.wowza.com/t/h264-avc-composition-time/487)._