[mythtv-users] Bug in "Watch Recordings" ?

Jason Donahue mythtv at timekiller.org
Thu May 13 14:03:41 EDT 2004 

Indeed, I was further behind in my version than I thought!

I was running 0.15.20040331-1, i just compiled and installed 
0.15.20040505-1

I will see if that fixes it tonight. Although, I suspect it will, if I
was still running a version with that bug...

Thanks a bunch!

On Thu, 2004-05-13 at 09:20, Steven Cruysberghs wrote:
> Can't exactly remember when it was fixed. Have a look in the commits
> archive or try disabling the preview video and see if it still happens.
> 
> Steven
> 
> > I am running CVS version from (i believe) 3/31/04.
> >
> > On Thu, 2004-05-13 at 08:19, Steven Cruysberghs wrote:
> >> Short answer to long mail :
> >>
> >> if you are using .14 version this is probably the bug where the preview
> >> video from the "watch recordings" screen keeps playing in the
> >> background.
> >> This has been fixed in CVS.
> >>
> >> > Sorry for the long email, but there was a lot to say!! (Get
> >> comfortable)
> >> >
> >> > I think I found a bug in MythTV, specifically in "Watch Recordings".
> >> >
> >> > First let me explain my setup...
> >> >
> >> > I have my master backend in my living room, with 2 CTV receivers
> >> hooked
> >> > up. The ringbuffer, and all recordings are stored on an NFS mounted
> >> data
> >> > server connected over cat 5. I also have a slave frontend in my
> >> bedroom,
> >> > coonected to the master backend over my 802.11G (54Mbps wireless). The
> >> > slave has no tuners defined, so to watch tv, I use an unused tuner on
> >> > the master backend, streamed wirelessly.
> >> >
> >> > On the master backed I have little to no problems. However, I have
> >> been
> >> > noticing problems the slave in the bedroom. The video "stutters" like
> >> > there is not enough bandwidth on the wireless link to handle the
> >> stream.
> >> >
> >> > It finally got to the point where I started troubleshooting. First
> >> off,
> >> > I KNOW the pipe is big enough for the stream, as I can watch live tv
> >> on
> >> > my laptop (802.11b - 11Mbps).
> >> >
> >> > What I discovered was, if I reboot both boxes, and go into live TV on
> >> > the slave, everything works fine. For hours I can watch TV with no
> >> > hiccups. Then I go into "Watch Recordings" and it plays fine for a few
> >> > minutes, then starts stuttering. Now keep in mind, the recordings are
> >> > physically on my data server, NFS mounted on the master backend,
> >> > streamed over the wireless. At first I thought there was too much
> >> > latency in the network, but here is where it gets odd.
> >> >
> >> > If I exit out of the recording, the network traffic does not die. Even
> >> > after 20 minutes of sitting at the main menu, the activity lights are
> >> > going nuts. I do some packet sniffing, and see myth  traffic (port
> >> 6543)
> >> > going back to the master backend. Furthermore, I see a ton of NFS
> >> > traffic going between the master backend, and the data server. If I
> >> kill
> >> > the frontend and both boxes, the traffic stops. Next I tried it the
> >> same
> >> > thing on the master backend. If start watching a recording (stored on
> >> > the dataserver). The hub lights up, as expected. I exit out, and the
> >> > lights keep going! A tcpdump shows that it's all NFS traffic (the port
> >> > 6543) traffic would not hit the wire, as the masterbackend is also the
> >> > frontend). If I kill the frontend, the traffic stops.
> >> >
> >> > It seems like a few minutes into watching recordings, a huge amount of
> >> > "extra" packets are being generated, and don't stop, even if sitting
> >> at
> >> > the menu. There is no video stuttering on the master backend,
> >> presumably
> >> > because the 100Mbps line can handle the "extra" traffic.
> >> Unfortunately,
> >> > the wireless link can not. I did some bandwidth tests on that link,
> >> and
> >> > consistantly get 1.2Mbps through - more that plenty, so this
> >> additional
> >> > traffic must be a lot.
> >> >
> >> > Now, here are some answers to questions I KNOW are coming:
> >> >
> >> > 1. My recordings are being recorded at the exact same bitrate as live
> >> TV
> >> >
> >> > 2. I am not transcoding the files afterwards
> >> >
> >> > 3. When I exit the recording, I am not sitting at the "preview"
> >> screen,
> >> > so the traffic is not coming from the thumbnail preview stream.
> >> >
> >> > And here is a snip of the tcpdumps I took:
> >> >
> >> > Sitting at the main menu, this is the traffic between the slave and
> >> the
> >> > master backend:
> >> >
> >> > 22:34:13.183065 10.2.100.5.6543 > 10.2.100.7.32780: . 3808:5256(1448)
> >> > ack 1 win 5792 <nop,nop,timestamp 107393 90608> (DF)
> >> > 0x0000   4500 05dc 562c 4000 4006 02e0 0a02 6405
> >> E...V, at .@.....d.
> >> > 0x0010   0a02 6407 198f 800c 2c92 1d3b 27e7 addc
> >> ..d.....,..;'...
> >> > 0x0020   8010 16a0 e61e 0000 0101 080a 0001 a381
> >> ................
> >> > 0x0030   0001 61f0 3282 b9ae b962 19d5 4e31 3de0
> >> ..a.2....b..N1=.
> >> > 0x0040   6300 1ae2 0810 e453 88c8 72ea b870 8c23
> >> c......S..r..p.#
> >> > 0x0050   f953                                           .S
> >> > 22:34:13.183403 10.2.100.5.6543 > 10.2.100.7.32780: . 5256:6704(1448)
> >> > ack 1 win 5792 <nop,nop,timestamp 107393 90608> (DF)
> >> > 0x0000   4500 05dc 562d 4000 4006 02df 0a02 6405
> >> E...V- at .@.....d.
> >> > 0x0010   0a02 6407 198f 800c 2c92 22e3 27e7 addc
> >> ..d.....,.".'...
> >> > 0x0020   8010 16a0 0e2d 0000 0101 080a 0001 a381
> >> .....-..........
> >> > 0x0030   0001 61f0 731e 06af 1061 8441 b931 17dd
> >> ..a.s....a.A.1..
> >> > 0x0040   39a8 3b05 e827 0f03 626c 03ae 1f07 2c8b
> >> 9.;..'..bl....,.
> >> > 0x0050   779d                                           w.
> >> > 22:34:13.183424 10.2.100.7.32780 > 10.2.100.5.6543: . ack 6704 win
> >> 63712
> >> > <nop,nop,timestamp 90609 107393> (DF)
> >> > 0x0000   4500 0034 103d 4000 4006 4e77 0a02 6407
> >> E..4.=@. at .Nw..d.
> >> > 0x0010   0a02 6405 800c 198f 27e7 addc 2c92 288b
> >> ..d.....'...,.(.
> >> > 0x0020   8010 f8e0 d7da 0000 0101 080a 0001 61f1
> >> ..............a.
> >> > 0x0030   0001 a381                                      ....
> >> > 22:34:13.183894 10.2.100.5.6543 > 10.2.100.7.32780: . 6704:8152(1448)
> >> > ack 1 win 5792 <nop,nop,timestamp 107393 90608> (DF)
> >> > 0x0000   4500 05dc 562e 4000 4006 02de 0a02 6405
> >> E...V. at .@.....d.
> >> > 0x0010   0a02 6407 198f 800c 2c92 288b 27e7 addc
> >> ..d.....,.(.'...
> >> > 0x0020   8010 16a0 12f7 0000 0101 080a 0001 a381
> >> ................
> >> > 0x0030   0001 61f0 0018 b365 0b38 78ba 3b0e 5054
> >> ..a....e.8x.;.PT
> >> > 0x0040   fe87 09b6 164e 1dc3 cf9c 098b d803 d967
> >> .....N.........g
> >> > 0x0050   600e                                           `.
> >> > 22:34:13.185640 10.2.100.5.6543 > 10.2.100.7.32780: . 8152:9600(1448)
> >> > ack 1 win 5792 <nop,nop,timestamp 107393 90609> (DF)
> >> > 0x0000   4500 05dc 562f 4000 4006 02dd 0a02 6405
> >> E...V/@. at .....d.
> >> > 0x0010   0a02 6407 198f 800c 2c92 2e33 27e7 addc
> >> ..d.....,..3'...
> >> > 0x0020   8010 16a0 a8ac 0000 0101 080a 0001 a381
> >> ................
> >> > 0x0030   0001 61f1 4918 5ec1 8bff e850 6871 e9b3
> >> ..a.I.^....Phq..
> >> > 0x0040   2810 62fa 530c ce22 d115 91ae 0000 0113
> >> (.b.S.."........
> >> > 0x0050   1224                                           .$
> >> > 22:34:13.185657 10.2.100.7.32780 > 10.2.100.5.6543: . ack 9600 win
> >> 63712
> >> > <nop,nop,timestamp 90609 107393> (DF)
> >> > 0x0000   4500 0034 103e 4000 4006 4e76 0a02 6407
> >> E..4.>@. at .Nv..d.
> >> > 0x0010   0a02 6405 800c 198f 27e7 addc 2c92 33db
> >> ..d.....'...,.3.
> >> > 0x0020   8010 f8e0 cc8a 0000 0101 080a 0001 61f1
> >> ..............a.
> >> > 0x0030   0001 a381                                      ....
> >> >
> >> > And here is a snip of the traffic between the master backend and the
> >> NFS
> >> > data server:
> >> >
> >> >
> >> > --
> >> > ×·.¸¸.·´¨)    ¸.·´  ¸.·´¨)
> >>   O    Jason Donahue
> >> >         (_¸.·´ (¸.·´¸.·×       O
> >> jdonahue at timekiller.org
> >> >                     (_¸.·´     O    http://www.timekiller.org
> >> >
> >> > _______________________________________________
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> >> >
> >>
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