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Choppy video on blazing fast connection

Guest
May 27, 2010 May 27, 2010

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Hi, we just set up FMS and basically what's happening is im using the standard run-of-the mill FLVplayback component and I try to run a video (an MP4) file which is streamed through FMS. The video plays, but intermittently chops.

Next test:

Akamai SMIL file with sthe same player plays totally smoothe, no problems.

Next test:

Put new video on FMS server (video chops intermittently) - we  then go right next to the server, with literally a 300K second download speed. Still chops.

Next test:

Try different media, same thing.

So essentially the FMS server CANNOT stream any videos properly. Its not a bandwidth issue, and it makes no sense.

I try different video players, tried changing the bufferTime properties, same thing. The FMS server is running at 0% cpu and is a fast machien.

Any ideas? FMS settings I can do to get optimal performance?

Austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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what bitrate is the video encoded at.......where did you get the .flv? we need to rule out that your video is not  the problem send it to me as attachment and i will play it on my server.

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Guest
May 27, 2010 May 27, 2010

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I've encoded 4 different videos at different bitrates, 300k, 600k, 900k, 1400k. All play totally fine when played locally. When they get streamed they chop.

I then take a piece of media from Adobe, encoded H264 MP4 file and this plays totally fine locally, but when streamed from FMS chops completely.

I can then play a video from Akamai's FMS server, no issue and smoothe.Same video will play differently on our FMS server.

Austin

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Guest
May 27, 2010 May 27, 2010

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I guess i should say "stutters" which is the better word.

Austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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what are the video window size on both sites? I'm guessing this isn't the problem so there is a setting in the xml configuration file called cache and you should set this i'll bring up my config folder and be more specific in my next post.

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Enthusiast ,
May 27, 2010 May 27, 2010

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try increaseing this parameter in server.xml <MaxKeyframeCacheSize>0</MaxKeyframeCacheSize>....change it to

30

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Guest
May 27, 2010 May 27, 2010

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The video media size in the FLV playback is 800 x 349.

We tried changing the MaxKeyframeCacheSize property to 100 and we didnt get any change.

We tried running the video just as progressive download and that works totally fine - meaning its not a bandwidth issue at all. Its a streaming issue with rtmp.

Austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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well first of all your video playback componet has a  huge area try to

change it to 320 x 240 also

try using rtmpt intstead of rtmp

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Guest
May 27, 2010 May 27, 2010

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Changed the flv video settings to 320x240 - same issue - stutters.

Changed the protocol to rtmptand it stopped working.

Austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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zip the stutter flv file. I want to try to play it on my server.

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Guest
May 27, 2010 May 27, 2010

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Its video from adobe's site

http://download.macromedia.com/pub/developer/h264_as3_samples.zip

austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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I don't have enough exsperience with mp4 to help you i can't get it to play with my player

only .flv.......sorry and I wish you luck.

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Guest
May 27, 2010 May 27, 2010

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It's actually just test media, FLV or MP4 have the same problem streaming.The real media we want to stream is flv, but basically we've isolated it makes no difference with media.

I just put that up just as a test. I think it's a server setting which is causing all of these issues.

Austin

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Enthusiast ,
May 27, 2010 May 27, 2010

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What O/S are you using ? maybe you have a bad install of FMS can you install the developer edition on a test desktop computer and see if you have the same problem....if you do then you will know its the default  FMS configuration if not then you can almost garuntee Operating Systerm or FMS install is culprit.

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