No liability for the contents of this documents can be accepted. Use the concepts, examples and other
content at your own risk. As this is a new edition of this document, there may be errors and inaccuracies, that may of course be damaging to your system. Proceed with caution, and although this is highly unlikely, the authors do not take any responsibility for that.
All copyrights are held by their respective owners, unless specifically noted otherwise. Use of a term in
this document should not be regarded as affecting the validity of any trademark or service mark.
Naming of particular products or brands should not be seen as endorsements.
You are strongly recommended to take a backup of your system before major installation and backups at regular intervals.
The following peope have been helpful in getting this HOWTO done:
This document is targeted at the Linux user interested in learning a bit about veejay and trying it out.
Version 1.0
You will find the most recent version of this document at veejay.sourceforge.net/veejay-HOWTO.html.
If you make a translation of this document into another langauge, let us know and we'll include a reference to it here.
We rely on you, the reader, to make this HOWTO usefull. If you have any suggestions, corrections , or comments , please
send them to us ( veejay-users@lists.sourceforge.net ), and we will try to incorporate
them in the next revision. Please add 'HOWTO veejay' to the Subject-line of the mail.
Before sending bug reports or questions, please read all of the information in this HOWTO, and send detailed information about the problem.
If you publish this document on a CD-ROM or in hardcopy form, a complimentary copy would be appreciated. Mail us for our postal address.
Also consider making a donation to the Veejay Project to help support free video editing software in the future.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts , and with no Back-Cover Texts. A copy of this license is included in the section entitled "GNU Free Documentation License".
Veejay is a live performance tool featuring simple non-linear editing and mixing
from multiple sources.
You can load multiple video files, cut and paste portion
s of video/audio and save it as an EditList.
Also, you can record new clips from
existing clips or (live) streams.
With these clips you can change playback spee
d (slow motion/acceleration), change the looptype and set markers.
With both clips and streams you can edit the effect chain and mix from multiple
sources to one. Veejay currently has 94 effects, divided into two categories: Image and
Video Effects, only with Video Effects you can select a channel to mix in.
Veejay has many frame blending methods, some of these are: Additive,Substractive
,Difference Negate, Relative Addition and Selective Replacement. Next to blendin
g, you can key on Luma and Chroma seperatly or combined or simply use Transition
s or other effects.
Most edit and navigation commands are mapped to single key press commands, this
allows you to control, depending on the playback mode, video navigation, the eff
ect chain, effect parameters and other properties at playback time.
Also, you can record a new clip on the fly from a live feed or from the video cl
ip you are playing. If requested, the recorded videofile will be added to the ed
it descision list and activated as a new video clip. This is particular usefull
for time-looping,rebouncing and rough clip scratching/editing.
Veejay can be remotely controled through using OSC (Open Sound Control) or via i
ts own internal message interface 'VIMS'.
'VIMS' allows you to create/load/save
effect chain templates and to add customized events which can be triggered by a
keypress or a remote message.
Veejay requires at least a linux kernel 2.4.x, 2.6.x or later, a lot of diskspace and a fast CPU.
Depending on the speed of your machine, your milage may vary. See the list below for
a few systems veejay was reported to work on:
Before you install Veejay, make sure you have the following dependencies installed:
Verify that the PKG_CONFIG_PATH variable is set to the directory containing files like jack.pc and directfb.pc to include them in the build process.
$ echo $PKG_CONFIG_PATHIf nothing is set, do something like
$ export PKG_CONFIG_PATH=/usr/local/lib/pkgconfigDecompress and untar the file by typing:
$ tar -jxvf veejay-0.6.0.tar.bz2Change to the directory containing veejay's source's:
$ cd veejay-0.6 $ ./configureOn completion it will summarize the results of the ./configure script, which could look like this:
veejay 0.6.0 build configuration :
Build configuration:
MMX enabled : true
MMX2 enabled : false
SSE enabled : true
3DNow enabled : false
CMOV enabled : true
glibc support for >2GB files : true
Required dependencies:
POSIX Threads (pthread) : true
video4linux recording/playback : true
Simple Direct Media Layer : true
XML C library for Gnome libxml2 : true
libDV (digital video) : true
libJPEG : true
Optional dependencies:
Jack Audio Connection Kit : true
DirectFB support : false
Now, you can start building veejay
$ makeFollowed by
# make install
First of all, you need to have Video For Linux enabled in your kernel configuration.
Make sure that V4L information in proc filesystem is enabled; veejay uses the proc file
system to find out what devices can be used to read from.
If you have no Video4Linux devices you can only stream from vloopback (only kernel <= 2.4) or from a yuv4mpeg stream.
If you have one or more Video4Linux devices, you should load the modules for these devices prior to loading
the vloopback module. The example below loads the vloopback module with a device offset parameter
so it will not conflict with your Video4Linux devices:
# insmod vloopback.o pipes=4 dev_offset=2On typing the command
# dmesgyou should see something like this:
Mar 31 23:41:01 dev kernel: vloopback.c: Video4linux loopback driver v0.90 Mar 31 23:41:01 dev kernel: vloopback.c: Loopback 0 registered, input: video2, output: video3 Mar 31 23:41:01 dev kernel: vloopback.c: Loopback 1 registered, input: video4, output: video5 Mar 31 23:41:01 dev kernel: vloopback.c: Loopback 2 registered, input: video6, output: video7 Mar 31 23:41:01 dev kernel: vloopback.c: Loopback 3 registered, input: video8, output: video9Refer to chapter 5. Popular Packages for using a video source. Also, the chapter 4.2 The console interface includes commands to create several types of streams
Veejay uses by default a SDL window to play a video file or video stream,
all the keybinding in veejay depend on SDL; if you move your mouse over to the
SDL windows to focus it , you can press the keys explained in 4.3 The keyboard interface.
On focussing the terminal in which veejay is running, you can type short commands (followed by a Return or Enter)
for saving / loading samplelists , to activate other video sources and much more, see
4.2 The console interface.
You must provide a video file to use with veejay; it will not run without a video file.
Veejay has a number of playback modes, each playback mode is unique and defines more or less
a different functionality:
| Mode | Description | Navigation | Looping | Speed | Effect Chain |
| Plain | Default mode, playback of video | Yes | No | Yes | No |
| Sample | Sample mode, playback of video samples. | Yes | Yes | Yes | Yes |
| Tag | Tag mode, playback of video streams | No | No | No | Yes |
The console interface takes commands from STDIN , the commands you can give are:
vi [file] Open video4linux device li [file] Open vloopback device fi [file] Open Y4M stream for input fo [file] Open Y4M stream for output lo [file] Open vloopback device for output cl [file] Load cliplist from file cn [n1] [n2] New clip from frames n1 to n2 cd [n] Delete clip n1 sd [n] Delete Stream n1 cs [file] Save cliplist to file es [file] Save editlist to file ec [n1] [n2] Cut frames n1 - n2 to buffer ed [n1] [n2] Del franes n1 - n2 ep [n] Paste from buffer at frame n1 ex [n1] [n2] Copy frames n1 - n2 to buffer er [n1] [n2] Crop frames n1 - n2 al [file] Action file Load as [file] Action file save de Toggle debug level (default off) be Toggle bezerk mode (default on)Also, you can send messages in VIMS format (or files, containing VIMS messages , with the commandline utility sendVIMS. See test/README in the source package).
182:0 0 150 3;See the VIMS document in the source package for a more detailed (but not yet complete) overview.
$ man veejay
The keyboard interface takes keypresses (events) from SDL, almost all keys on
your keyboard have a function in veejay.
Typically, the keys on your numeric keypad can be used for navigation (play forward, play backward,
skip frames, skip to end , skip to start , etc).
The keys a,s,d,f,
g,h,j,k and l can be used to increase speed from 1 (normal) to
9 (fast)
Here is a quick overview for the most commonly used keys, if applied in order you will end up
with a newly created video sample looping in some way (depending on how many times you press the asterix key)
| Description | SDL key | In plain english |
| Set the starting position of a new sample | SDLK_LEFTBRACKET | Left bracket |
| Set ending position and create a new sample | SDLK_RIGHTBRACKET | Right bracket |
| Select and play sample 1 | SDLK_F1 | F1 |
| Set playback speed to 3 | SDLK_d | d |
| Change looptype | SDLK_KP_MULTIPLY | asterix on numeric keypad |
| Play backward | SDLK_KP_4 | Cursor left on numeric keypad |
| Play forward | SDLK_KP_6 | Cursor right on numeric keypad |
| Skip 1 second | SDLK_KP_8 | Cursor up on numeric keypad |
| Switch playmode to Plain | SDLK_KP_DIVIDE | Divide on numeric keypad |
| Print information about sample | SDLK_HOME | Home |
You can record video to a new clip , by using the stream- or clip recorder functions.
For example, to record a new clip from a playing clip in MJPG format:
010:mjpg;Record 100 frames and start playing new clip when ready:
130:100 1;Record the whole clip and dont start playing new clip when ready:
130:0 0;If your Effect Chain is very CPU demanding , consider disabling audio and using the commandline parameter -c 0 to disable sync correction.
Currently there are 4 extra utilities yuv2rawdv , rawdv2yuv , sendVIMS and any2yuv included in the veejay package for encoding
a Y'CBCR 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)
If you use the clamp parameters, it will clip (not scale!) a pixel into a valid range,
the resulting video could be for example a bit darker if the input stream has values for
Luminance exceeding the maximum of 235.| Channel | Range (Clamp) | Byte range (no clamping) |
| Y (Luminance) | 16 - 235 | 0 - 255 |
| Cb (Chroma Blue) | 16 - 240 | 0 - 255 |
| Cr (Chroma Red) | 16 - 240 | 0 - 255 |
$ 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 offrows 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: sendVIMS [options] [messages] where options are: -p Veejay port (3490) -h Veejay host (localhost) -fSend contents of this file to veejay Messages to send to veejay must be wrapped in quotes You can send multiple messages by seperating them with a whitespace
sendVIMS "182:0 0 113 1;"
Usefull software (in no apparant order):
$ effectv -device /dev/video0 -channel 1 -norm pal -vloopback /dev/video2If everything goes well you should see your camera input in EffecTV; continue loading veejay:
$ veejay /tmp/my_video_file.avi
> li video3If everything goes well again, you should see EffecTV's output in veejay.
Mplayer is the movie player for linux, it has support for different types of output You can use mplayer to play a DVD or some MPEG4 file and stream it into veejay. First, create a named pipe
$ mkfifo stream.yuvContinue with starting mplayer
$ mplayer -vo yuv4mpeg -ao null -zoom -x 352 -y 288 -vop scale yuy2 /tmp/mpeg4_movie.aviIf everything goes well, mplayer waits until a frame has been read from the named pipe. Mplayer uses by default the filename stream.yuv, if you specify another mplayer will create a stream.yuv.
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.
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
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
There is a mailing list for veejay which is hosted by Sourceforge. The address is veejay-users@lists.sourceforge.net
End of the Veejay HOWTO. (You can stop reading here.)
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