[juiev]

I have two PCs. I want to use one of them as a Cam server. I'll call this as mac_S. So i installed Ubuntu Server 8.04 on mac_S. I will use other machine (that i call as mac_K) to connecting over LAN for control and install packages on mac_S. I am using Kubuntu 8.04 on mac_K.

I've got two cams on mac_S. One of them is a webcam installed via usb2 port. And other is a ccd dome security cam which is installed via internal PCI DVR Card. The webcam recognized by kernel as /dev/video0 and the other cam reconized as /dev/video3.
IP address of mac_K on is 192.168.0.50 on LAN.


Information about mac_S:

mac_S~[/color]$ uname -a
Linux ubuntu 2.6.24-16-server #1 SMP Thu Apr 10 13:58:00 UTC 2008 i686 GNU/Linux
mac_S~$ lsmod | grep spca
gspca 643280 0
videodev 29312 3 gspca,saa7134
usbcore 146028 4 gspca,ehci_hcd,uhci_hcd
mac_S~$ lsmod | grep vide
videobuf_dma_sg 15108 1 saa7134
videobuf_core 18820 2 saa7134,videobuf_dma_sg
videodev 29312 3 gspca,saa7134
v4l2_common 18304 2 saa7134,videodev
v4l1_compat 15492 2 saa7134,videodev
mac_S~$ lsusb
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 004: ID 0733:1314 ViewQuest Technologies, Inc.
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
mac_S~$ dmesg | tail -n 25
[ 59.184664] saa7134: card=117 -> Avermedia Super 007 1461:f01d
[ 59.184686] saa7130[3]: subsystem: 1131:0000, board: UNKNOWN/GENERIC [card=0,autodetected]
[ 59.184742] saa7130[3]: board init: gpio is 10000
[ 59.291759] saa7130[3]: Huh, no eeprom present (err=-5)?
[ 59.291947] saa7130[3]: registered device video3 [v4l2]
[ 59.292059] saa7130[3]: registered device vbi3
[ 61.602582] /build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-server/media/gspcav1/gspca_core.c: USB GSPCA camera found.Sunplus FW 2
[ 61.620574] usbcore: registered new interface driver gspca
[ 61.620603] /build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-server/media/gspcav1/gspca_core.c: gspca driver 01.00.20 registered
[ 67.115141] loop: module loaded
[ 67.422228] lp: driver loaded but no devices found
[ 68.523535] Adding 1004020k swap on /dev/sda1. Priority:-1 extents:1 across:1004020k
[ 69.129125] EXT3 FS on sda2, internal journal
[ 70.317349] NET: Registered protocol family 10
[ 70.318609] lo: Disabled Privacy Extensions
[ 71.959235] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 80.589015] eth0: no IPv6 routers present
[ 4010.298947] usb 3-1: USB disconnect, address 2
[ 4952.821260] usb 3-1: new full speed USB device using uhci_hcd and address 3
[ 4953.019825] usb 3-1: configuration #1 chosen from 1 choice
[ 4953.021867] /build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-server/media/gspcav1/gspca_core.c: USB GSPCA camera found.Sunplus FW 2
[ 5024.256972] usb 3-1: USB disconnect, address 3
[ 5514.276948] usb 3-1: new full speed USB device using uhci_hcd and address 4
[ 5514.475485] usb 3-1: configuration #1 chosen from 1 choice
[ 5514.477385] /build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-server/media/gspcav1/gspca_core.c: USB GSPCA camera found.Sunplus FW 2

I did not see any problem above. Did you? So i will explain process step by step that i made.

I did not installed X on mac_S. Because mac_S has Intel Celeron 400 and 256 MB RAM and it's going slow when X starts while serving. So i'm going to send cam streams on port 5000 to mac_K (As written in this article http://ivtvdriver.org/index.php/Howto:Netcat_streaming ). I connected to mac_S over ssh with mac_K.

Before I wrote on mac_K

mac_K~$ nc -l -p 5000 | mplayer -

And wrote on mac_S

mac_S~$ cat /dev/video0 | nc 192.168.0.50 5000

mac_K shows this error message:

Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
.
.
.
Cannot seek backward in linear streams!
Seek failed

Then i tried it for other cam (/dev/video3) and i saw same message.

If cams are not work! May be. I remove webcam on mac_S and put on mac_K:

mac_K~$ cat /dev/video0 | mplayer -

It's working on mac_K. The problem is not cams fault.

Is this a connection problem over port 5000?

mac_K~$ nc -l -p

mac_S~$ ls -goal | nc 192.168.0.50 5000

Output of mac_K

total 3004
drwxr-xr-x 3 4096 2008-07-02 12:17 .
drwxr-xr-x 3 4096 2008-06-30 13:09 ..
drwx------ 2 4096 2008-07-02 13:29 .aptitude
-rw------- 1 2662 2008-07-02 12:29 .bash_history
-rw-r--r-- 1 220 2008-06-30 13:09 .bash_logout
-rw-r--r-- 1 2928 2008-06-30 13:09 .bashrc
-r--r--r-- 1 8434 2008-07-02 11:58 .fishsrv.pl
-rwxrwxrwx 1 1744217 2008-07-02 12:08 kerman.flv
-rw-r--r-- 1 1279106 2008-07-02 12:17 .locate
-rw-r--r-- 1 586 2008-06-30 13:09 .profile
-rw-r--r-- 1 0 2008-06-30 13:16 .sudo_as_admin_successful

It's not port connection problem

May another problem is, not to steaming video over network?

mac_K~$  nc -l -p 5000 | mplayer -

mac_S~$ cat kerman.flv | nc 192.168.0.50 5000

Output of mac_S:

Playing -.
Reading from stdin...
libavformat file format detected.
[lavf] Video stream found, -vid 0
[lavf] Audio stream found, -aid 1
VIDEO: [FLV1] 320x240 0bpp 29.970 fps 0.0 kbps ( 0.0 kbyte/s)
xscreensaver_disable: Could not find XScreenSaver window.
================================================== ========================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffflv] vfm: ffmpeg (FFmpeg Flash video)
================================================== ========================
================================================== ========================
Forced audio codec: mad
Opening audio decoder: [libmad] libmad mpeg audio decoder
AUDIO: 22050 Hz, 1 ch, s16le, 8.0 kbit/2.27% (ratio: 1000->44100)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
================================================== ========================
AO: [pulse] Failed to connect to server: Connection refused
AO: [alsa] 48000Hz 1ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 320 x 240 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 320x240 => 320x240 Planar YV12
A: 14.7 V: 19.6 A-V: -4.932 ct: -1.635 491/491 2% 0% 1.5% 0 0

Video file is streaming over network. So it is not a streaming problem.

I can't find any way to solve this problem. Do you?

Shortly my problem is to use mac_S as cam (especially over dvr)streaming server. I used mac_S before to serve webcam over ZoneMinder. But i can't take cam streams now. What may be the problem? I can't find sufficient resources abuot dvr cam streaming. Do you know?

I'm waiting for your help! And sorry about weak english.