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 10 of 34 messages [Show 3 7 14 30 *100* 999 days or *10* 30 50 100 999 messages]

2010-01-15

by strick:

[edit]

http://jackvalmadre.wordpress.com/2008/09/21/resizable-image-control/

http://www.pygtk.org/articles/cairo-pygtk-widgets/cairo-pygtk-widgets.htm

2010-01-18

by strick:

[edit]

http://eccentric.cx/misc/pygtk/pygtkfaq.html

2010-01-24

by strick:

[edit]

WHITEPAPER – IP Streaming of MPEG-4: Native RTP vs MPEG-2 TS http://www.envivio.com/pdf/RTPvsTS-v4.pdf

2010-11-08

by strick:

[edit]

ffmpeg Example: Convert to mp4

ffmpeg -acodec copy -b 820000 -i 22\ Things\ In\ My\ Pants.flv ffmpeg_820_22\ Things\ In\ My\ Pants.flv.mp4

by strick:

[edit]

mencoder example -- I think using mp3 was a mistake.

for x; do echo $x ; mencoder -ovc x264 -oac mp3lame "$x" -o "mencode_$x.mp4" ; done

by strick:

[edit]

PBKDF2 (Password-Based Key Derivation Function) => http://tools.ietf.org/html/rfc2898

CCM => http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/ccm/ccm.pdf => http://www.ietf.org/rfc/rfc3610.txt

2010-11-10

by strick:

[edit]

http://www.chromeextensions.org/music-videos-photos/download-youtube-videos-as-mp4-flv/

2011-09-04

by strick:

[edit]

$ cat /usr/local/bin/a

#!/bin/bash
cd $HOME/Downloads

DIR="$1"
mkdir -p "$DIR"

case $# in
1)
  ls *.mp4 *.flv *.mp4.crdownload *.flv.crdownload *.mp4.part *.flv.part 2>/dev/null |
  while read f ; do
    test -f "$f" && test -s "$f" || continue
    case "$f" in
      *.crdownload )
        g=$(basename "$f" .crdownload)
        test -f ",$g," && continue
        bash "$0" "$DIR" "$f" &
        echo ::::: $! ::::: "$DIR" ::::: "$f" >&2
	;;
      *.part )
        g=$(basename "$f" .part)
        test -f ",$g," && continue
        bash "$0" "$DIR" "$f" &
        echo ::::: $! ::::: "$DIR" ::::: "$f" >&2
	;;
      * )
        mv -v "$f" "$DIR"
	;;
    esac
  done
  ;;
2)
  f="$2"
  g=$(basename "$f" .crdownload)
  g=$(basename "$g" .part)
  ln "$f" ",$g,"
  while true ; do
    if test -f "$g" && test -s "$g"; then
        echo "   $$ @@@" >&2
        mv -v "$g" "$DIR"
	rm ",$g,"
	break
    fi
    sleep 1
  done
  ;;
*)
  echo WTF: $* >&2
  exit 13
  ;;
esac

by strick:

[edit]

Foo

by strick:

[edit]

Remark this is a function. Come into this is a function. New line This is a function. Carriage return B**** make me a function. B**** define class camel virtual database proxy extending object. B**** import built in operating system. Declare of thirst rick at the yac Let routing end of file become negative 1. Lets shout ing in the file.

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