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Does your Stream Stutter? If so read this.
msgtgunny
Moderator
When trying to determine why a cast is stuttering, there are 2 categories to look at, hardware and network:
As you can see, there are a lot of variables, some of which the you can't actually check. But the important thing to be learned from this topic is just because a speedtest says you can upload at 80 mb/s like I can
does not mean you are actually going to be able to stream at the bitrate to Justin/Twitch.tv.
A general rule of thumb is keep it below 3000kbps, never have it above 4000kbps on ANY of their proxy servers (I've run tests on each one). Also remember is if you get 3000 kbps on a server at 4 am in the morning on a Sunday (when no one else is broadcasting) does not mean you will also be able to get the same bitrate at 9pm on a Thursday or Friday night (High Peak times).
If you have any questions or comments, feel free to leave them here.
Update: If you are using XSplit, these are the servers you see:
- Hardware includes their own computer and the current state of the jtv network.
- Network is their local intranet (AKA inside your home network), the real connection they get from their isp (gotten from a speedtest.net test), the max amount the jtv proxy server will give them, and the network connections between their home and said proxy server.
As you can see, there are a lot of variables, some of which the you can't actually check. But the important thing to be learned from this topic is just because a speedtest says you can upload at 80 mb/s like I can
does not mean you are actually going to be able to stream at the bitrate to Justin/Twitch.tv.
A general rule of thumb is keep it below 3000kbps, never have it above 4000kbps on ANY of their proxy servers (I've run tests on each one). Also remember is if you get 3000 kbps on a server at 4 am in the morning on a Sunday (when no one else is broadcasting) does not mean you will also be able to get the same bitrate at 9pm on a Thursday or Friday night (High Peak times).
If you have any questions or comments, feel free to leave them here.
Update: If you are using XSplit, these are the servers you see:
- default="Global Load Balancing Service" url="rtmp://live-3c.justin.tv/app"
- Main Origin Cluster url="rtmp://live.justin.tv/app"
- West Coast Secondary url="rtmp://live-sea.justin.tv/app"
- East Coast Secondary url="rtmp://live-wdc.justin.tv/app"
- US Central Secondary" url="rtmp://live-dfw.justin.tv/app"
- Miami, FL url="rtmp://live-mia.justin.tv/app"
- New York, NY url="rtmp://live-jfk.justin.tv/app"
- Los Angeles, CA url="rtmp://live-lax.justin.tv/app"
- London Primary url="rtmp://live-lhr.justin.tv/app"
- London Secondary url="rtmp://live-lhr-backup.justin.tv/app"
- Amsterdam primary url="rtmp://live-ams.justin.tv/app"
Post edited by msgtgunny on
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Comments
I'm using a Hauppauge HD PVR to capture my xbox 360.
Currently I have a dual core @ 2.4 GHz and a ATI 4850 GPU. I have problems even streaming at 678 x 432 with these settings in xsplit and that's with no other processes, just xsplit. My problem seems to be my CPU @ 80%-100% even at idle.
I had big hopes on starting a unique channel on TwitchTV but it looks like that's going to be put on hold until I can afford building a new computer... (5 months later...) Looks like I'm going to have to wait, kills me after spending £240 on a HD PVR.
I also get the green light with the London servers, no problems with 1800kb/s.
So yeah, what would you consider the minimum requirements for a decent quality stream? I appreciate help from anyone!
Thanks
@harleyxz 720p is overrated. If you want a high quality stream try this as your preset
"ultrafast&ex:crf:13"
without the quotes and set quality to not set. The faster the preset the less resources xsplit will use encoding the video, but the less efficient it is so your stream will use a bit more bandwidth.
if you want to look at what the crf command does, check here http://mewiki.project357.com/wiki/X264_Settings#crf
also I would stream at 640x360 because that is the size of the player on twitch.tv and people will only ever see a quality difference if they go fullscreen, but if you have a really solid 640x360 stream, then it is unlikely they will notice a difference from a less solid 720p stream.
<font face="Arial"></font><br>I think it would be best for me to ask the xSplit team on their fourms because I noticed my CPU only maxes out with xSplit and nothing else I use.
Thanks again
@harleyxz open up your task manager and see what process is using your cpu. If its xsplit.core.exe (or something similar) that is just the main xsplit window and it shouldn't be using that much cpu. If its vhmultiwriter2.exe *or something similar) then this is the encoder and should be using your cpu. Live real time video transcoding is processor intensive.
I guess that's really bad? It got higher at points aswel, around 75.
Do you have the latest version?
http://www.speedtest.net/result/1690308417.png This is what i got for my speedtest, any suggestions?
Heres my specs;
Windows 7
Intel i3 540 @3.07GHz
16.0 GB Dual-Channel DDR3 @ 666MHz
1024MB GeForce GTX 460
1TB Samsung HD
Dell Ultrasharp 24"
OK let me start by saying im soo happy there is a place to find help about this! Anyway this is what im working with: Compaq Presario CQ56 Notebook pc, Intel Celeron CPU 900 @ 2.20GHz, 2.00 gb ram, 64bit OS.
Im also using Adobe flash media encoder 3.2. Now ive gotten two different screen captures to in case i didnt like the other (Manycam & VHScrCap) Now my prob is that im gonna start streamming game off of mine 360. So before it comes in the mail I wanted to get streamming down pat, so I told my self i would stream my desk top before i get it so at least it wouldnt be new to me. But every time i stream the video on the site is mad laggy. Ive tested it on 15 - 30 fps and even switched from H.264 to Vp6. On the norm i would of fixed the prob by now but I dont really know what im doing wrong! Now i know messing with the bit rate maybe would help but ive been trying this for days with no luck! I will say that before i start to stream the input and output preview screen has no lag. But as soon as i start......its lag! If there are any tips you might be able to give me it would be a big help! And thank you soo much for taking the time to hear my story.
http://www.speedtest.net/result/1746310127.png
I have my changed my input res to 680x480 output res to 640x360. But still it dosent run as smooth as i may want it to. Only when i put both the input res and the out put res to 320x240 dose it run smooth. But it looks like crap!! or is this telling me that i can only run it on that res?? It says that Ezcap can push out 720p but when i do the video is every were!! Or maybe do i need more ram??? I have 2 gig right now. Any info would be a big help!!
Thanks for your help!