# RTSP cannot streaming on Samsung Galaxy S/S2 **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [August 3, 2012, 1:07am UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095 "2012-08-03T01:07:51Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Johnny\_Tran](https://avatars.discourse-cdn.com/v4/letter/j/439d5e/32.png) [@Johnny\_Tran](https://community.wowza.com/u/Johnny_Tran)\ **Post date:** [August 3, 2012, 1:07am UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095/1 "2012-08-03T01:07:51Z")
Hi, I try play sample in **[https://www.wowza.com/html/mobile.html](https://www.wowza.com/html/mobile.html)** using my Samsung Galaxy S, It work. But when I try streaming the same file on my server ( **rtsp://202.134.19.40/vod/_definst_/mp4:tmh/bbb\_160p115k.mov** ), my Samsung Galaxy S say it cannot play this file. Then I try Samsung Galaxy S2 with no luck. My Samsung Galaxy Tab and HTC One X can play with long delay (about 10s - 15s). I’m using VLC to play on desktop and the logs console show an decode\_slice\_header error. Does someone knows what is happening? ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [August 2, 2012, 11:35pm UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095/2 "2012-08-02T23:35:10Z")
Most likely UDP ports are blocked. Some of these devices will only stream over UDP, others can failover to TCP, which is what you are seeing when start time is very long. You have to open all UDP ports (0-65535) on the server, and you might have to map them to you Wowza server in your network, e.g., port-forwarding in a router. Test by playing in VLC. There will probably be a long start time there too because it will fail-over to TCP. When it starts, look at Tools \> Codec Info. You will probably see two audio and two video entries, that is a good test to see if it is failing over, which you don’t want. When you get UDP ports open and mapped as necessary, it will start quickly and you will see one set of audio/video in Codec Info. Make sure you have followed these guides: [https://www.wowza.com/docs/how-to-set-up-an-application-for-rtsp-rtp-streaming](https://www.wowza.com/docs/how-to-set-up-an-application-for-rtsp-rtp-streaming) [https://www.wowza.com/docs/how-to-troubleshoot-rtsp-rtp-playback](https://www.wowza.com/docs/how-to-troubleshoot-rtsp-rtp-playback) Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [August 3, 2012, 3:35pm UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095/3 "2012-08-03T15:35:59Z")
Great, glad it’s working. Thanks for the update Richard ---
**Author:** ![Johnny\_Tran](https://avatars.discourse-cdn.com/v4/letter/j/439d5e/32.png) [@Johnny\_Tran](https://community.wowza.com/u/Johnny_Tran)\ **Post date:** [August 3, 2012, 10:24pm UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095/4 "2012-08-03T22:24:15Z")
Thanks, it work great. ---
**Author:** ![Jerry\_Smith](https://avatars.discourse-cdn.com/v4/letter/j/85e7bf/32.png) [@Jerry\_Smith](https://community.wowza.com/u/Jerry_Smith)\ **Post date:** [August 23, 2012, 12:22am UTC](https://community.wowza.com/t/rtsp-cannot-streaming-on-samsung-galaxy-s-s2/39095/5 "2012-08-23T00:22:12Z")
Cool. This post also helps me for my Galaxy S 2… * * * [Getting iTunes movies/songs to Galaxy S](http://ifiresoft.com/drmtips/itunes-to-galaxy-s-ii.html)