Streaming over Wi-Fi not watchable

binary64 · 2008-05-21, 19:48

TV-Server Version: latest

Hi, I upgraded to N wireless. Usually connecting at 300mbit, sometimes 270. Only 1 ceiling inbetween client and router. Both client and router are MIMO. Client is PCI.

Every 30 secs or so (very random.. range is 5secs-2mins), the picture freezes or garbles for about 2 seconds. Sometimes I hear a horrible digital screetch too.

I see a few of these "MPEG PES video-stream" packets in Wireshark, all say Malformed. Although this could easily be false information (if wireshark is buggy analyzing this format).

38874 104.100992 192.168.1.2 PTS 94.982977777 MPEG PES video-stream[Malformed Packet]

I view this as a bug, because I can copy 8 gig files over this wifi very fast and very reliable (using XP's loss-intolerant Explorer.exe).

Ideas to fix:
* Allow for RTP transport over TCP or HTTP. Live555 - VideoLAN Wiki indicates TVE3's rtsp server code can do this.
* Increase or allow user to increase some sort of buffers to allow for a wifi hiccup / drop. I don't mind live tv being delayed by another 3 seconds or so.
* Upgrade Live555, I see they have a 9 day old build (not sure if you keep in sync with these releases). Index of /liveMedia/public

1200assassin · 2008-05-21, 22:01

What happens if you browse to the share in windows and play the files using windows media player etc? I am not very fimiliar with MediaPortal yet but network video is usually buffered on the player pc's hdd to prevent the freezes etc. Is there a buffer setting that exists in MP that you can adjust?

For the networking portion you shouldnt be using http unless you are pulling content from a streaming server ie windows media server etc so you would be using RTP over TCP/IP. I would def suggest enabling this if you can. But its only my humble opinion. Increasing the buffer size will usually fix the problem unless you are playing a huge move from the remote share.

binary64 · 2008-05-21, 22:20

ok playing the \\master\c$\Program Files\Team MediaPortal\MediaPortal TV Server\live1-0.ts.tsbuffer1.ts over wifi in wmp11 plays perfectly.

I dont know of any buffer setting I can change; would love to know.

BTW: watching rtsp with mediaportal uses UDP/IP not TCP/IP. that's possibly why i have problems; some packets get lost. Where TCP they wouldn't get lost, just delayed by a few seconds.

1200assassin · 2008-05-21, 22:32

Ok I am now stepping past my knowledge of streming media. Need to know more about the program itself to be of any use. I second the assumption that UDP/IP could be the issue. Try manually setting your transmission rate on your router for wireless to below the lowest value that you have seen when connected from the client. Wireless has a habit of renegotiating when a different (slower of faster) connections speed is available. This would def cause UDP xfers to pause, scramble and restart. You are correct when that happens TCP/IP reconnects and resumes better. My advise could be useless but hopefully its a quick fix for you.

binary64 · 2008-05-22, 15:47

Just tried reducing the speed to 130 mbit. It seems a lot better, but certainly is still unwatchable. Well, watchable, just not enjoyable at all.

Even so, if it had worked, I want 300mbit not 25mbit

Any word from a dev whether this is deemed a bug or not? Obviously i am hoping it is a bug!!

1200assassin · 2008-05-22, 16:01

Good luck to you. Maybe there is a way to enable tcp/ip instead of UDP.

rtv · 2008-05-30, 13:43

Well upgrading to the latest live555 source would be great. However we've currently no resources to check and re-merge the changes done to those.

binary64 · 2008-05-30, 14:26

Ok. thank you for taking the time to consider it anyway.

this might also relate: HDTV (S2) channels: Stuttering video on Live-TV & Recorder TV

but again, i understand that would consume valuable dev time in sourcing the diff, getting licences straight, merging, and testing.

volk · 2008-06-01, 05:21

Binary, I had a similar issue playing movies over a wireless connection. Movies were skipping forward :/ I installed CCCP Combined Community Codec Pack , after which the issue was resolved. Give it a shot.

mts · 2008-06-08, 19:17

I have exactly the same problems.
Maybe you should have a look at mythTV. I had many problems with this software but I never had stutterings.

2008-05-21, 19:48	#1 (permalink)
binary64 Portal Member Join Date: Jul 2006 Posts: 102 Thanks: 2 Thanked 1 Time in 1 Post	Streaming over Wi-Fi not watchable TV-Server Version: latest Hi, I upgraded to N wireless. Usually connecting at 300mbit, sometimes 270. Only 1 ceiling inbetween client and router. Both client and router are MIMO. Client is PCI. Every 30 secs or so (very random.. range is 5secs-2mins), the picture freezes or garbles for about 2 seconds. Sometimes I hear a horrible digital screetch too. I see a few of these "MPEG PES video-stream" packets in Wireshark, all say Malformed. Although this could easily be false information (if wireshark is buggy analyzing this format). 38874 104.100992 192.168.1.2 PTS 94.982977777 MPEG PES video-stream[Malformed Packet] I view this as a bug, because I can copy 8 gig files over this wifi very fast and very reliable (using XP's loss-intolerant Explorer.exe). Ideas to fix: * Allow for RTP transport over TCP or HTTP. Live555 - VideoLAN Wiki indicates TVE3's rtsp server code can do this. * Increase or allow user to increase some sort of buffers to allow for a wifi hiccup / drop. I don't mind live tv being delayed by another 3 seconds or so. * Upgrade Live555, I see they have a 9 day old build (not sure if you keep in sync with these releases). Index of /liveMedia/public Last edited by binary64; 2008-05-21 at 19:51.

2008-05-30, 13:43	#7 (permalink)
rtv Portal Developer Join Date: Apr 2005 Location: Osnabruck Posts: 2,512 Thanks: 84 Thanked 95 Times in 69 Posts Country: My System	Well upgrading to the latest live555 source would be great. However we've currently no resources to check and re-merge the changes done to those. __________________ My amazon wishlist - that stuff might help me to improve MediaPortal

2008-06-08, 19:17	#10 (permalink)
mts Portal Member Join Date: Sep 2007 Posts: 139 Thanks: 0 Thanked 0 Times in 0 Posts Country:	I have exactly the same problems. Maybe you should have a look at mythTV. I had many problems with this software but I never had stutterings. __________________ Mutliseat-config: LAN: GigaBit Server: -> Intel 6600 \| 2GM RAM \| HDD1/2: 400GB / 750GB \| XP-SP2 Client1-2 (SDTV): -> PentiumM 1.5 GHz \| 1024 RAM \| Nvidia 7100GS (1360x768) XP-Sp2 Client3 (HDTV): -> Intel 9450 \| 8GB RAM \| Nvidia 9600GTX (1920x1200) \| Vista 64bit Client4 (HDTV): -> Intel 6750 \| 4GB RAM \| Nvidia 8800GTX (2450x1600) \| Vista 32bit Client5 (WLAN): -> Intel T7300 \| 2GB RAM \| ATI M. X2500 \| XP-SP2

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2008-05-21, 22:01	#2 (permalink)
1200assassin Portal Member Join Date: May 2008 Posts: 10 Thanks: 0 Thanked 0 Times in 0 Posts	What happens if you browse to the share in windows and play the files using windows media player etc? I am not very fimiliar with MediaPortal yet but network video is usually buffered on the player pc's hdd to prevent the freezes etc. Is there a buffer setting that exists in MP that you can adjust? For the networking portion you shouldnt be using http unless you are pulling content from a streaming server ie windows media server etc so you would be using RTP over TCP/IP. I would def suggest enabling this if you can. But its only my humble opinion. Increasing the buffer size will usually fix the problem unless you are playing a huge move from the remote share.

2008-05-21, 22:20	#3 (permalink)
binary64 Portal Member Join Date: Jul 2006 Posts: 102 Thanks: 2 Thanked 1 Time in 1 Post	ok playing the \\master\c$\Program Files\Team MediaPortal\MediaPortal TV Server\live1-0.ts.tsbuffer1.ts over wifi in wmp11 plays perfectly. I dont know of any buffer setting I can change; would love to know. BTW: watching rtsp with mediaportal uses UDP/IP not TCP/IP. that's possibly why i have problems; some packets get lost. Where TCP they wouldn't get lost, just delayed by a few seconds.

2008-05-21, 22:32	#4 (permalink)
1200assassin Portal Member Join Date: May 2008 Posts: 10 Thanks: 0 Thanked 0 Times in 0 Posts	Ok I am now stepping past my knowledge of streming media. Need to know more about the program itself to be of any use. I second the assumption that UDP/IP could be the issue. Try manually setting your transmission rate on your router for wireless to below the lowest value that you have seen when connected from the client. Wireless has a habit of renegotiating when a different (slower of faster) connections speed is available. This would def cause UDP xfers to pause, scramble and restart. You are correct when that happens TCP/IP reconnects and resumes better. My advise could be useless but hopefully its a quick fix for you.

2008-05-22, 15:47	#5 (permalink)
binary64 Portal Member Join Date: Jul 2006 Posts: 102 Thanks: 2 Thanked 1 Time in 1 Post	Just tried reducing the speed to 130 mbit. It seems a lot better, but certainly is still unwatchable. Well, watchable, just not enjoyable at all. Even so, if it had worked, I want 300mbit not 25mbit Any word from a dev whether this is deemed a bug or not? Obviously i am hoping it is a bug!!

2008-05-22, 16:01	#6 (permalink)
1200assassin Portal Member Join Date: May 2008 Posts: 10 Thanks: 0 Thanked 0 Times in 0 Posts	Good luck to you. Maybe there is a way to enable tcp/ip instead of UDP.

2008-05-30, 14:26	#8 (permalink)
binary64 Portal Member Join Date: Jul 2006 Posts: 102 Thanks: 2 Thanked 1 Time in 1 Post	Ok. thank you for taking the time to consider it anyway. this might also relate: HDTV (S2) channels: Stuttering video on Live-TV & Recorder TV but again, i understand that would consume valuable dev time in sourcing the diff, getting licences straight, merging, and testing.

2008-06-01, 05:21	#9 (permalink)
volk Portal User Join Date: Jun 2008 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	Binary, I had a similar issue playing movies over a wireless connection. Movies were skipping forward :/ I installed CCCP Combined Community Codec Pack , after which the issue was resolved. Give it a shot.