Only a few channels are stuttering over a 100Mbps LAN - Page 5

blaudden · 2009-03-15, 21:17

erosoco: my conclusions are the same as you. It must be a streaming problem. Please keep digging!

titof · 2009-03-15, 21:23

Quote:

Originally Posted by blaudden

erosoco: my conclusions are the same as you. It must be a streaming problem. Please keep digging!

Is it possible for a developer looking at ?

tourettes · 2009-03-15, 21:26

HDTV (S2) channels: Stuttering video on Live-TV & Recorder TV

Known issue (winsock 1 should be replaced with winsock 2). Currently no plans for fixing (i.e. no developer around who has enough knowledge & free time on that area)

titof · 2009-03-15, 21:34

Quote:

Originally Posted by tourettes

HDTV (S2) channels: Stuttering video on Live-TV & Recorder TV

Known issue (winsock 1 should be replaced with winsock 2). Currently no plans for fixing (i.e. no developer around who has enough knowledge & free time on that area)

For me, it's not on HDTV channels, but on DVB-T standard channels. Perhaps it's same problem ...

erosco · 2009-03-16, 00:38

Gent's

I apologise for not posting for a while..unfortunately my pc died (overheated) and it'll be a week or two before I can afford replacement parts...

There's definately bugs in the RTSP stuff.. And I'm not convinced this is a simple winsock1/2 problem although I do believe it's related to timing of ACKs etc coming back. It very well could (partly) be that the current implementation doesn't do blocking properly. I'm convinced there's buffer overruns in various spots as I've seen packets arrive (using wireshark) on the client that txreader never sees. I've also seen dramatic differences in lost TS records being sent from the TVServer depending on whether the CPU is busy/idle.. epg is running and various other factors.

In essence; I think it needs an overhaul (which is probably out of my league).. but when I get set up again I might try and play around with the latest live555 stuff and see what I can come up with.

Cheers
erosco

titof · 2009-03-16, 09:28

@erosco or any developer
Can you test with this recording in RTSP mode ? It's stuttering in RTSP mode but not in normal mode (via MyVideo for exemple). It's not a HDTV recording, just a simple mpeg2 recording.

Please, say me why it's stuttering ?

Thanks.

blaudden · 2009-03-16, 11:46

Managed to compile the StreamingServer example program and modified it so it's now able to stream one of my recorded files(that shows stuttering). Will see what I can find - if I figure out how this works

titof · 2009-03-17, 21:57

someone could test my recording ?

thanks

blaudden · 2009-03-18, 21:21

Hi,

you can read my analyze of this problem at:

Magnus blog: Stutter in MediPortal streaming server

Best regards
Magnus

titof · 2009-03-23, 11:36

Hi,

Any news about this ? Are you progress in your research ?

Can a MP developer could look ?

2009-03-15, 21:26	#43 (permalink)
tourettes Portal Developer Join Date: Jan 2005 Age: 32 Posts: 8,430 Thanks: 351 Thanked 634 Times in 412 Posts	HDTV (S2) channels: Stuttering video on Live-TV & Recorder TV Known issue (winsock 1 should be replaced with winsock 2). Currently no plans for fixing (i.e. no developer around who has enough knowledge & free time on that area) __________________ http://day2.no-ip.org/ "Commy64 - The problem there is that Oprah was on. MP tried to save you by blanking the screen"

2009-03-18, 21:21	#49 (permalink)
blaudden Portal Member Join Date: Nov 2006 Posts: 68 Thanks: 0 Thanked 2 Times in 2 Posts Country: My System	Stutter in MediPortal streaming server Hi, you can read my analyze of this problem at: Magnus blog: Stutter in MediPortal streaming server Best regards Magnus

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2009-03-15, 21:17	#41 (permalink)
blaudden Portal Member Join Date: Nov 2006 Posts: 68 Thanks: 0 Thanked 2 Times in 2 Posts Country: My System	erosoco: my conclusions are the same as you. It must be a streaming problem. Please keep digging!

2009-03-16, 00:38	#45 (permalink)
erosco MP Donator Join Date: Jun 2007 Age: 41 Posts: 102 Thanks: 11 Thanked 10 Times in 8 Posts Country: My System	Gent's I apologise for not posting for a while..unfortunately my pc died (overheated) and it'll be a week or two before I can afford replacement parts... There's definately bugs in the RTSP stuff.. And I'm not convinced this is a simple winsock1/2 problem although I do believe it's related to timing of ACKs etc coming back. It very well could (partly) be that the current implementation doesn't do blocking properly. I'm convinced there's buffer overruns in various spots as I've seen packets arrive (using wireshark) on the client that txreader never sees. I've also seen dramatic differences in lost TS records being sent from the TVServer depending on whether the CPU is busy/idle.. epg is running and various other factors. In essence; I think it needs an overhaul (which is probably out of my league).. but when I get set up again I might try and play around with the latest live555 stuff and see what I can come up with. Cheers erosco

2009-03-16, 09:28	#46 (permalink)
titof Moderateur Join Date: Mar 2008 Posts: 2,016 Thanks: 16 Thanked 36 Times in 25 Posts Country:	@erosco or any developer Can you test with this recording in RTSP mode ? It's stuttering in RTSP mode but not in normal mode (via MyVideo for exemple). It's not a HDTV recording, just a simple mpeg2 recording. Please, say me why it's stuttering ? Thanks.

2009-03-16, 11:46	#47 (permalink)
blaudden Portal Member Join Date: Nov 2006 Posts: 68 Thanks: 0 Thanked 2 Times in 2 Posts Country: My System	Managed to compile the StreamingServer example program and modified it so it's now able to stream one of my recorded files(that shows stuttering). Will see what I can find - if I figure out how this works

2009-03-17, 21:57	#48 (permalink)
titof Moderateur Join Date: Mar 2008 Posts: 2,016 Thanks: 16 Thanked 36 Times in 25 Posts Country:	someone could test my recording ? thanks

2009-03-23, 11:36	#50 (permalink)
titof Moderateur Join Date: Mar 2008 Posts: 2,016 Thanks: 16 Thanked 36 Times in 25 Posts Country:	Hi, Any news about this ? Are you progress in your research ? Can a MP developer could look ?