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The Yak tries Linux Webcam Video

The story so far:

Using Ubuntu Desktop 8.02 (Hardy Heron), a little Logitech pokéball-shaped webcam is automatically recognized by the kernel.

With System > Administration > Synaptic Package Manager, we search for "webcam" and find "camorama".

Install it, and run "camorama" at the command line. It just works.

...

What we want:

A videoconference server and client screen, for multiple people to connect to.

Jan 2, 2009

ffmpeg commands http://docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:ffmpeg

Records cam video to avi

ffmpeg -r 20 -f video4linux2 -s 352x288 -i /dev/video0 -an -f avi ./test.avi

Streams to a player at 192.169.9.107 listening on port 1234

ffmpeg -f video4linux2 -s cif -r 15 -i /dev/video0 -v 0 -vcodec mpeg4 -f mpegts udp:192.168.9.107:1234

ffserver sample config file: http://www.ffmpeg.org/sample.html

ubuntu webcam through ffserver and ffmpeg example: http://ubuntuforums.org/archive/index.php/t-665607.html

10062 ? S 0:01 gedit file:///home/strick/build/ffmpegTest/ffserverEx2.conf

10109 pts/1 S+ 0:04 ffserver -d -f ffserverEx2.conf

10120 pts/3 S+ 0:55 ffmpeg -r 15 -s 352x288 -f video4linux2 -i /dev/video0 http://localhost:8090/feed1.ffm 

Port 8090
# bind to all IPs aliased or not
BindAddress 0.0.0.0
# max number of simultaneous clients
MaxClients 1000
# max bandwidth per-client (kb/s)
MaxBandwidth 10000
# Suppress that if you want to launch ffserver as a daemon.
NoDaemon

<Feed feed1.ffm>
File /tmp/feed1.ffm
FileMaxSize 5M
</Feed>

# ASF output - for windows media player
<Stream test.mpg>
# the source feed
Feed feed1.ffm
# the output stream format - ASF
Format mpegts
VideoCodec mpeg4
# this must match the ffmpeg -r argument
VideoFrameRate 15
# generally leave this is a large number
VideoBufferSize 80000
# another quality tweak
VideoBitRate 200
# quality ranges - 1-31 (1 = best, 31 = worst)
VideoQMin 1
VideoQMax 5
VideoSize 352x288
# this sets how many seconds in past to start
PreRoll 0
# wecams don't have audio
Noaudio
</Stream>

combines video: ffmpeg -i test1.avi -i test2.avi -vcodec copy -vcodec copy test12.avi -newvideo

gstreamer test: gst-launch-0.10 videotestsrc \! autovideosink

gstreamer + commandline toys: http://noraisin.net/~jan/diary/?p=40

More Working Stuff:

gst-launch-0.10 v4l2src ! video/x-raw-yuv,width=320,height=240 ! ffmpegcolorspace ! xvimagesink

gst-launch-0.10 -v -vv v4l2src ! queue ! video/x-raw-yuv,width=320,height=240,framerate="(fraction)10/1" ! queue ! videorate ! videoscale ! ffmpegcolorspace ! xvimagesink

Sender: might be working: but not with receiver?

gst-launch-0.10 -v -vv v4l2src ! queue ! video/x-raw-yuv,width=320,height=240,framerate="(fraction)10/1" ! queue ! videorate ! videoscale ! ffmpegcolorspace ! queue ! tcpserversink host=192.168.9.106 port=5555

OLPC on GStreamer: http://wiki.laptop.org/go/GStreamer

~ Saturday Jan 11, 2009 - Found out Uhura was using an old version of Ubuntu. Upgraded it to the latest version and Video LAN Client works in capturing video now. VLC 0.9.x uses Video4Linux2 which has better support for webcams.
~Ryan

~ I think VLC interfaces or bindings are the way to go. http://wiki.videolan.org/Interface VLC already works to stream and capture, we can build a new interface for it, tuned to our needs. See "Build an application on VLC" here: http://wiki.videolan.org/Developers_Corner
~Ryan

MORE NOTES

showing all 19 messages     [Show 3 7 *10* 14 30 100 999 days or 10 *30* 50 100 999 messages]

2009-08-23

by strick:
http://www.engadget.com/2005/11/29/how-to-stream-almost-anything-using-vlc/

by strick:
http://wiki.videolan.org/VLVC

by strick:
WORKS ON WINDOWS:

$ /c/gstreamer/bin/gst-launch-0.10.exe videotestsrc ! video/x-raw-yuv,width=800,height=600 ! ffmpegcolorspace ! dshowvideosink

by strick:
FROM WINDOWS TO LINUX, one frame every 5 secs or so:

$ /c/gstreamer/bin/gst-launch-0.10.exe dshowvideosrc ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! theoraenc ! queue ! gdppay ! udpsink host=192.168.0.156 port=4321

by strick:
RECEIVING IT ON LINUX:

gst-launch-0.10 udpsrc port=4321 ! gdpdepay ! theoradec ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! xvimagesink

(must start the receiver first, then the sender)

by strick:
Broadcast:

[lx] gst-launch -v v4l2src ! video/x-raw-yuv,width=640,height=480,"framerate=(fraction)10/1" ! smokeenc keyframe=30 ! progressreport ! udpsink port=5000

Listen:

[lx] gst-launch-0.10 -v udpsrc port=5000 ! smokedec ! video/x-raw-yuv ! xvimagesink

[win]   /c/gstreamer/bin/gst-launch-0.10.exe -v udpsrc port=5000 ! smokedec ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! dshowvideosink

by strick: 
strick@uhura:~/Desktop$ cat /tmp/gstreamer-dual-video.shar
cat <<'END' >linux-recv.txt
  DISPLAY=unix:0 gst-launch-0.10 -v udpsrc port=5000 ! smokedec ! video/x-raw-yuv ! xvimagesink
END
cat <<'END' >linux-send.txt
  gst-launch-0.10 -v v4l2src ! video/x-raw-yuv,width=640,height=480,framerate="(fraction)10/1" ! smokeenc keyframe=30 ! udpsink port=5000 host=192.168.0.155
END
cat <<'END' >win-recv.txt
  gst-launch-0.10.exe -v udpsrc port=5000 blocksize=64000 buffer-size=99999 ! smokedec ! video/x-raw-yuv  ! ffmpegcolorspace ! dshowvideosink
END
cat <<'END' >win-send.txt
  /c/gstreamer/bin/gst-launch-0.10.exe  -v dshowvideosrc ! video/x-raw-yuv,width=640,height=480,"framerate=(fraction)10/1" ! smokeenc keyframe=30 ! progressreport ! udpsink port=5000 host=192.168.0.156
END
strick@uhura:~/Desktop$

2009-08-24

by strick:
LINUX AUDIO SENDER:

gst-launch-0.10 alsasrc ! audioconvert -v ! audio/x-raw-int,channels=1 ! mulawenc ! audio/x-mulaw,channels=1,rate=8000 ! udpsink port=9001 host=127.0.0.1

LINUX AUDIO RECEIVER:

gst-launch-0.10 -vvv -m udpsrc port=9001 ! audio/x-mulaw,channels=1,rate=8000 ! queue ! mulawdec ! audio/x-raw-int,channels=1 ! alsasink

2009-09-11

by strick:
SMOKE UDP

gst-launch-0.10 -vm v4l2src ! video/x-raw-yuv,width=640,height=480,framerate=\(fraction\)5/1,format=\(fourcc\)YUY2 ! ffmpegcolorspace ! smokeenc ! udpsink port=9876 host=pidi sync=false

gst-launch-0.10 udpsrc port=9876 ! smokedec ! xvimagesink

by strick:
SMOKE GDPPAY TCP

GST_DEBUG=3 gst-launch-0.10 -vm v4l2src ! video/x-raw-yuv,width=640,height=480,framerate=\(fraction\)5/1,format=\(fourcc\)YUY2 ! ffmpegcolorspace ! smokeenc ! video/x-smoke, width=640, height=480, framerate=\(fraction\)5/1 ! gdppay ! tcpclientsink port=9876 host=pidi sync=false

gst-launch-0.10 tcpserversrc port=9876 host=pidi ! gdpdepay ! smokedec ! xvimagesink

by strick:
MPEG1 GDPPAY TCP

gst-launch-0.10 -vm v4l2src ! video/x-raw-yuv,width=640,height=480,framerate=\(fraction\)5/1,format=\(fourcc\)YUY2 ! ffmpegcolorspace ! ffenc_mpeg1video ! gdppay ! tcpclientsink port=9876 host=pidi

gst-launch-0.10 tcpserversrc -vm port=9876 host=pidi ! gdpdepay ! ffdec_mpegvideo ! xvimagesink

by strick:

AUDIO MULAW UDP

alsasrc blocksize=4096 <= leads to 512-byte UDP packets

gst-launch-0.10 alsasrc ! audioconvert -v ! audio/x-raw-int,channels=1 ! mulawenc ! audio/x-mulaw,channels=1,rate=8000 ! identity dump=true ! udpsink port=9001 host=127.0.0.1 sync=false

/pipeline0/identity0: last-message = "chain ******* (identity0:sink)i (80 bytes, timestamp: 0:00:01.680000000, duration: 0:00:00.010000000, offset: -1, offset_end: -1, flags: 0) 0x7f1d84001740" 

00000000 (0x792490): af af b0 b0 b0 b0 af af b0 b0 b0 b0 af af af af  ................
00000010 (0x7924a0): af af af af af af af af af af af af af af af af  ................
00000020 (0x7924b0): af af af af af af af af af ae ae ae ae ae af af  ................
00000030 (0x7924c0): ae ae af af ae ae ae af ae ae ae ae ae ae ae ae  ................
00000040 (0x7924d0): af af ae ae ae ae af ae ae ae ae af af af af af  ................

gst-launch-0.10 -vvv -m udpsrc port=9001 ! audio/x-mulaw,channels=1,rate=8000 ! mulawdec ! audio/x-raw-int,channels=1 ! alsasink provide-clock=false sync=false buffer-time=200000

/pipeline0/identity0: last-message = "chain ******* (identity0:sink)i (160 bytes, timestamp: 0:00:09.101903000, duration: 0:00:00.010000000, offset: -1, offset_end: -1, flags: 0) 0x77e540" 

00000000 (0x7a9270): fc 16 fc 18 fc 18 fc 16 fc 17 fc 1d 7c 28 7c 30  ............|(|0
00000010 (0x7a9280): 7c 30 7c 2e 7c 2c 7c 28 7c 26 7c 2a 7c 2c 7c 2a  |0|.|,|(|&|*|,|*
00000020 (0x7a9290): 7c 2a 7c 2c 7c 30 7c 32 7c 32 7c 32 7c 2c 7c 26  |*|,|0|2|2|2|,|&
00000030 (0x7a92a0): 7c 24 7c 24 7c 26 7c 26 7c 24 7c 22 fc 1c fc 16  |$|$|&|&|$|"....
00000040 (0x7a92b0): fc 12 3c 0d 3c 09 5c 07 9c 06 cc 02 64 fb 44 f7  ..<.<.\.....d.D.
00000050 (0x7a92c0): c4 f3 04 ed 04 ee c4 f3 04 ef 04 e7 04 e3 84 dd  ................
00000060 (0x7a92d0): 84 dd 04 e1 04 e2 84 df 84 d5 84 cf 84 df a4 fb  ................
00000070 (0x7a92e0): 7c 20 7c 34 7c 2c fc 1b 3c 0d 9c 03 bc 09 fc 11  | |4|,..<.......
00000080 (0x7a92f0): fc 12 bc 0d ac 01 a4 00 bc 09 fc 14 7c 22 7c 24  ............|"|$
00000090 (0x7a9300): fc 1b fc 0f bc 08 bc 0b fc 12 fc 16 fc 17 fc 13  ................

2009-09-14

by strick:
UDP Demo with select() 
# Based on Demo code from http://www.evolt.org/node/60276
# by Premshree Pillai, Mumbai University, India.

import select
import sys
from socket import *

host = "localhost"
port = 21567
buf = 1024
addr = (host,port)

DUMPERS = {}
def dump(data, addr):
  print "GOT <%s> from %s" % (data, addr)
  print type(data)

UDPSock = socket(AF_INET,SOCK_DGRAM)
if sys.argv[1:] and sys.argv[1] == 's':
  UDPSock.bind(addr)
  DUMPERS[UDPSock] = dump
  rd, wr, er = select.select([UDPSock], [], [], 999)
  print rd, wr, er

  data,addr = rd[0].recvfrom(buf)
  DUMPERS[rd[0]](data, addr)

else:
  data = "I wish I were an Oscar Meyer Wiener!"
  UDPSock.sendto(data,addr)

Server prints: 

[<socket._socketobject object at 0xb7d371ec>] [] []
GOT <I wish I were an Oscar Meyer Wiener!> from ('127.0.0.1', 58621)
<type 'str'>

2009-09-27

by strick:
install pycrypt

$ evince /usr/share/doc/python-crypto/pycrypt.ps.gz 

strick@retro:~$ python
Python 2.5.2 (r252:60911, Jul 22 2009, 15:35:03)
[GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from Crypto.Hash import MD5
>>> m = MD5.new()
>>> m.update('abc')
>>> m.hexdigest()
'900150983cd24fb0d6963f7d28e17f72'
>>> from Crypto.Cipher import AES
>>> from Crypto.Cipher import Blowfish
>>> b=Blowfish.new('passwd', Blowfish.MODE_CBC, 8*'x')
>>> z=b.encrypt('abcdefgh')
>>> b=Blowfish.new('passwd', Blowfish.MODE_CBC, 8*'x')
>>> b.decrypt(z)
'abcdefgh'

>>>from Crypto.PublicKey import RSA
>>> rk=RSA.generate(384,lambda n: open('/dev/urandom').read(n))
>>> rk
<Crypto.PublicKey.RSA.RSAobj_c instance at 0xb76dbfac>
>>>
>>> hash = MD5.new('foo').digest()
>>> hash
'\xac\xbd\x18\xdbL\xc2\xf8\\\xed\xefeO\xcc\xc4\xa4\xd8'
>>> sig = rk.sign(hash, '')
>>> sig
(5635910766727867518384394844488772812542483416326736205994225419700197466916507571003891072480941350727262782912755L,)
>>> rk.verify(hash, sig)
True
>>> rk.verify(hash[:-1], sig)
False
>>>

2009-10-17

by strick:
For Windows Python25:

http://www.voidspace.org.uk/python/modules.shtml#pycrypto

  • pycrypto-2.0.1.win32-py2.5.zip

    • by strick:
    http://www.oreillynet.com/onlamp/blog/2006/12/an_easy_pygtk_windows_installe.html

    =>

    http://aruiz.typepad.com/siliconisland/2006/12/allinone_win32_.html

    =>

    http://osl.ulpgc.es/~arc/gnome/pygtk-setup.exe

    by strick:
    http://www.gstreamer-winbuild.ylatuya.es/doku.php

    For Python 2.5:

  • Pygst-0.10.15.1.exe

    It warns C:/Python25 already exists. I say Continue.

    • 2009-10-19

    by strick:
    # /home/strick/repos/owlvc [strick@albus owlvc]$ python2.4 mux.py hub xyzzy

    root@uhura:/home/strick/owlvc# python2.5 mux.py poke xyzzy BAR 2 Xyz albus.yak.net 55 

    GC Timeout: ('128.61.105.188', 9999)
Recent Add: ('128.61.105.188', 55045)
Repeat except ('128.61.105.188', 55045) consider ('128.61.105.188', 55045)
[] [] [] [] [] [] [] [] [] ['#70370'] ## RecvFrom:#70370 : ('128.61.105.188', 55045) -> ['0x3', '0x41', '0x62', '0x63', '0x4a', '0xdb', '0xe5', '0x35', '0x1', '0x0', '0x0', '0x66', '0x0', '0x0', '0x0', '0x3', '0x46', '0x4f', '0x4f', '0xb4', '0xd5', '0x4c', '0xd5']
Repeat except ('128.61.105.188', 55045) consider ('128.61.105.188', 55045)
[] [] ['#70370'] ## RecvFrom:#70370 : ('128.61.105.188', 9999) -> ['0x3', '0x58', '0x79', '0x7a', '0x4a', '0xdb', '0xe5', '0x38', '0x2', '0x0', '0x0', '0x66', '0x0', '0x0', '0x0', '0x3', '0x42', '0x41', '0x52', '0xdc', '0xad', '0x3', '0x60']
Recent Add: ('128.61.105.188', 9999)
Repeat except ('128.61.105.188', 9999) consider ('128.61.105.188', 9999)
Repeat except ('128.61.105.188', 9999) consider ('128.61.105.188', 55045)
## SendTo:#70370 -> ('128.61.105.188', 55045) : ['0x2', '0x58', '0x79', '0x7a', '0x4a', '0xdb', '0xe5', '0x38', '0x2', '0x0', '0x0', '0x66', '0x0', '0x0', '0x0', '0x3', '0x42', '0x41', '0x52', '0xdc', '0xad', '0x3', '0x60']
[] [] [] [] []



    strick@PC ~/work/owlvc
$ python25 mux.py  poke xyzzy FOO 1 Abc albus.yak.net 555
## SendTo:#23403 -> ('albus.yak.net', 555) : ['0x3', '0x41', '0x62', '0x63', '
0x4a', '0xdb', '0xe5', '0x35', '0x1', '0x0', '0x0', '0x66', '0x0', '0x0', '0x0',
 '0x3', '0x46', '0x4f', '0x4f', '0xb4', '0xd5', '0x4c', '0xd5']

    [strick@albus owlvc]$ rsync -ave 'ssh -vp22' ../owlvc/ strick@172.24.40.135:owlvc/

    2009-10-26

    by strick:
    This is "WinDump.exe udp" output, on Windows XP.

    These are fragmented UDP packets, typically 10K to 30K size. They leave the XP box successfully & arrive at 75-144-20-99 successfully. When 75-144-20-99 sends a packet back, it looks like only the first fragment (with the UDP header) makes it back.

    Why not the other fragments?

    The same kind of fragmented UDP do arrive back -- through the exact same routers & masquarade -- on a linux box on the same network, same switch, as this Windows box. So I think the problem has to be in XP. 

    20:56:03.008291 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.008303 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.063024 IP 75-144-20-99-ca.sfba.comcastbusiness.net.55055 > STRICK-CORP.
mshome.net.9899: UDP, length 14248
20:56:03.215487 IP STRICK-CORP.mshome.net.9899 > 75-144-20-99-ca.sfba.comcastbus
iness.net.55055: UDP, length 21334
20:56:03.215515 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215528 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215541 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215553 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215565 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215578 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215590 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215602 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215614 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215627 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215639 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215652 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215663 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.215675 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.262692 IP 75-144-20-99-ca.sfba.comcastbusiness.net.55055 > STRICK-CORP.
mshome.net.9899: UDP, length 13950
20:56:03.426976 IP STRICK-CORP.mshome.net.9899 > 75-144-20-99-ca.sfba.comcastbus
iness.net.55055: UDP, length 21288
20:56:03.427005 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427018 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427030 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427043 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427055 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427067 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427080 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427092 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427104 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427116 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427128 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427140 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427152 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.427164 IP STRICK-CORP.mshome.net > 75-144-20-99-ca.sfba.comcastbusiness
.net: udp
20:56:03.463705 IP 75-144-20-99-ca.sfba.comcastbusiness.net.55055 > STRICK-CORP.
mshome.net.9899: UDP, length 14300

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  • both.sh
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  • multi-vid.sh
  • pygst-webcam-viewer.py
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