$ veejay -V 224.0.0.50 -p 5000

$ sayVIMS "246:5000 224.0.0.50;" 

4.6 Other utilities

Currently there are 4 extra utilities yuv2rawdv , rawdv2yuv , sayVIMS and any2yuv included in the veejay package for encoding a Y'C_BC_R 4:2:0 stream to raw DV and vice versa.

yuv2rawdv takes input from STDIN and outputs to STDOUT, we illustrate this with a few examples.

When loading yuv2raw dv without parameters you will see:

This program reads a YUV4MPEG stream and puts RAW DV to stdout
Usage:  yuv2rawdv [params]
where possible params are:
    -v num    Verbosity [0..2] (default 1)
    -l num    Clamp Luma (default 0)
    -c num    Clamp Chroma (default 0)

$ cat yuv4mpeg-file.yuv | yuv2rawdv | playdv

$ cat yuv4mpeg-file.yuv | yuv2rawdv -l 1 -c 1 | playdv

This program reads a raw DV stream from stdin and puts YV12/I420 to stdout
Usage:  rawdv2yuv [params]
where possible params are:
   -v num     Verbosity [0..2] (default 1)
   -x         Swap Cb/Cr channels to produce IV12 (default is I420)
   -n num     Norm to use: 0 = NTSC, 1 = PAL (default 1)
   -q         DV quality to fastest (Monochrome)
   -h         Output Half frame size
   -c num     clip off  rows of frame (for use with -h)
              must be a multiple of 8

$ cat raw.dv | rawdv2yuv -h | yuvplay

$ cat raw.dv | rawdv2yuv -h -c 8 | yuvplay

This program reads anything from stdin and puts YV12/I420 to stdout
Usage:  any2yuv [params]
where possible params are:
   -v num     Verbosity [0..2] (default 1)
   -x         Swap Cb/Cr channels to produce IV12 (default is I420)
   -n num     Norm to use: 0 = NTSC, 1 = PAL (default 1)

Usage: sayVIMS [options] [messages]
where options are:
 -p             Veejay port (3490)
 -h             Veejay host (localhost)
 -g			    Veejay multicast address (224.0.0.50)
 -f   Send contents of this file to veejay
 -c             Colored output (geek feature)

Messages to send to veejay must be wrapped in quotes
You can send multiple messages by seperating them with a whitespace

5 Popular Packages

Usefull software (in no apparant order):

• The MJPEG Tools
• Transcode
• PureData (PD)
• PDP for PD

5.1 The MJPEG Tools

The Mjpeg tools are a set of tools that can do recording of videos and playback, simple cut-and-paste editing and the MPEG compression of audio and video under Linux. You can use the EditLists from this package in veejay and vice versa
Here are a few examples for processing video data:

1. Start veejay headless:

$ mkfifo /tmp/special_file
$ veejay /video/video.avi -O3 -o /tmp/special_file

$ cat /tmp/special_file | yuv2rawdv -v 2 > rawdv

$ cat /tmp/special_file | yuv2lav -v2 -f 0 -I 0 -q 90 -o video-mjpeg.avi

$ veejay movie1.avi -o stdout -O3 | yuv2lav -f 0 -I 0 -q 90 -o movie1-mjpeg.avi

5.2 Transcode

Transcode is a Linux video Stream Processing Tool, it can convert between different types of video formats

Encode a file to mjpeg with no audio and rescale the output video to 352x288:

$ transcode -i input_file.avi -o new_mjpeg_file.avi -y mjpeg,null -Z352x288

6. Other Resources

6.1 Web Sites

Packages you need

• veejay
• Quasar DV Codec http://libdv.sourcefoge.net
• Simple DirectMedia Layer http://www.libsdl.org
• The XML C library for Gnome http://www.xmlsoft.org
• DirectFB http://www.directfb.org
• JACK http://jackit.sourceforge.net
• FreeType , http://freetype.sourceforge.net

Usefull software

• Mplayer http://www.mplayerhq.hu
• The MJPEGTools http://mjpeg.sourceforge.net
• Pure Data
• sendVIMS PD module (very cool!)
• Transcode http://www.theorie.physik.uni-goettingen.de/~ostreich/transcode/

6.2 Mailing Lists

There is a mailing list for veejay which is hosted by Sourceforge. The address is veejay-users@lists.sourceforge.net

6.3 Veejay developer's lounge

7. Credits

End of the Veejay HOWTO. (You can stop reading here.)

8. GNU Free Documentation License

GNU Free Documentation License

Version 1.1, March 2000

Copyright (C) 2000 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

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