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 video tracker/editing and live performance tool for Linux. It provides a graphical interface for video editing and mixing as well as a keyboard interface for direct user interaction (in a performance environment).
Veejay is a small collection of utilities build arround veejay, it has an optional graphical interface gveejay which provides (remote) non linear editing. Veejay provides sample based editing and will provide tracker style compositing of video in the future. Sample based editing means dividing your video material into short loops and then to process them individually by setting up properties or adding effects/transitions on the sample's effect chain. All these actions can be applied in realtime, showing immediate effect on your video. It provides mechanisms to mix multiple video sources in realtime.
Veejay requires at least a linux kernel 2.4.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:
After downloading the source package , decompress and untar the file by typing:
$ tar -zxvf veejay-0.5.x.tar.gzChange to the directory containing veejay's source's:
$ cd veejay-0.5.xFirst, you have to compile FFmpeg's avcodec which is included in the package;
$ cd ffmpeg $ ./configure $ makeFFmpeg is included in the source distribution to avoid version problems.
$ ./configureOn completion it will summarize the results of the ./configure script
veejay 0.4.6 build configuration : - X86 Optimizations: - MMX/3DNow!/SSE enabled : true - Using fast memcpy : true - cmov support enabled : true *********************************************************************** * NOTE: * * The resultant binaries will ***NOT*** run on a K6 or Pentium CPU * *********************************************************************** - video4linux recording/playback : true - software MJPEG playback : true - XML C library for Gnome libxml2 : true - movtar playback/recording : false - Quicktime playback/recording : false - DirectFB support : true (>= v0.9.17) - libDV (digital video) support : true (>= v0.9.5) - glibc support for >2GB files : trueIf the lists includes everything you need type
$ makeFollowed by
# make install
After downloading the source package 'gveejay' , decompress and untar the file by typing:
$ tar -zxvf gveejay-0.4.x.tar.gzChange to the directory containing veejay's source's:
$ cd gveejay-0.4.xNow, run the configure script and build gveejay:
$ ./configure $ makeAnd install it by typying:
$ 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 vloopback output can be used to read from from.
If you have no Video4Linux devices you can only stream from vloopback or from a yuv4mpeg stream.
You still need to have the above mentioned items if you want to use vloopback.
If you have one or more Video4Linux devices, you should load 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.
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 apply to:
Description | Examples |
Load a samplelist from file | sl /tmp/my_samplelist |
Save a samplelist to a file | ss /tmp/new_samplelist |
Open a video4linux device for input | vi /dev/video0 |
Open a vloopback pipe for input | li 0 |
Open a yuv4mpeg stream to dump video | ft |
Close the yuv4mpeg stream | ft |
Open a vloopback pipe to stream out | lo 1 |
Close a vloopback device that is streaming out | lc |
$ 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 |
$ man veejay
You can output video to a yuv4mpeg stream by using the ft console command
or by using the Grab Video button in gveejay.
veejay will automatically create a new file when you toggle the output stream
It is possible to start veejay headless and have it write all video data to
a (special) file for further processing.
Refer to chapter 5.3 for some examples.
Currently there are 2 extra utilities yuv2rawdv and rawdv2yuv 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
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 -a0 -v2 /tmp/my_video_file.aviType the command li in the veejay's console, hit ESC and press Insert to toggle the stream on or off.
$ veejay -a0 -v2 /tmp/my_video_file.avi -vloopback /dev/video2If everything goes well you see your video file beeing played back. Type the command lo to start streaming to the vloopback device, continue starting EffecTV by typing:
effectv -device /dev/video3 -norm pal -size 352x288If everything goes well you see veejay's output in EffecTV.
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.)
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
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
0. PREAMBLE
The purpose of this License is to make a manual, textbook, or other written document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others.
This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software.
We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference.
1. APPLICABILITY AND DEFINITIONS
This License applies to any manual or other work that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. The "Document", below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as "you".
A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.
A "Secondary Section" is a named appendix or a front-matter section of the Document that deals exclusively with the relationship of the publishers or authors of the Document to the Document's overall subject (or to related matters) and contains nothing that could fall directly within that overall subject. (For example, if the Document is in part a textbook of mathematics, a Secondary Section may not explain any mathematics.) The relationship could be a matter of historical connection with the subject or with related matters, or of legal, commercial, philosophical, ethical or political position regarding them.
The "Invariant Sections" are certain Secondary Sections whose titles are designated, as being those of Invariant Sections, in the notice that says that the Document is released under this License.
The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License.
A "Transparent" copy of the Document means a machine-readable copy, represented in a format whose specification is available to the general public, whose contents can be viewed and edited directly and straightforwardly with generic text editors or (for images composed of pixels) generic paint programs or (for drawings) some widely available drawing editor, and that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. A copy made in an otherwise Transparent file format whose markup has been designed to thwart or discourage subsequent modification by readers is not Transparent. A copy that is not "Transparent" is called "Opaque".
Examples of suitable formats for Transparent copies include plain ASCII without markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly available DTD, and standard-conforming simple HTML designed for human modification. Opaque formats include PostScript, PDF, proprietary formats that can be read and edited only by proprietary word processors, SGML or XML for which the DTD and/or processing tools are not generally available, and the machine-generated HTML produced by some word processors for output purposes only.
The "Title Page" means, for a printed book, the title page itself, plus such following pages as are needed to hold, legibly, the material this License requires to appear in the title page. For works in formats which do not have any title page as such, "Title Page" means the text near the most prominent appearance of the work's title, preceding the beginning of the body of the text.
2. VERBATIM COPYING
You may copy and distribute the Document in any medium, either commercially or noncommercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3.
You may also lend copies, under the same conditions stated above, and you may publicly display copies.
3. COPYING IN QUANTITY
If you publish printed copies of the Document numbering more than 100, and the Document's license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a publicly-accessible computer-network location containing a complete Transparent copy of the Document, free of added material, which the general network-using public has access to download anonymously at no charge using public-standard network protocols. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public.
It is requested, but not required, that you contact the authors of the Document well before redistributing any large number of copies, to give them a chance to provide you with an updated version of the Document.
4. MODIFICATIONS
You may copy and distribute a Modified Version of the Document under the conditions of sections 2 and 3 above, provided that you release the Modified Version under precisely this License, with the Modified Version filling the role of the Document, thus licensing distribution and modification of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in the Modified Version:
A. Use in the Title Page (and on the covers, if any) a title distinct from that of the Document, and from those of previous versions (which should, if there were any, be listed in the History section of the Document). You may use the same title as a previous version if the original publisher of that version gives permission. B. List on the Title Page, as authors, one or more persons or entities responsible for authorship of the modifications in the Modified Version, together with at least five of the principal authors of the Document (all of its principal authors, if it has less than five). C. State on the Title page the name of the publisher of the Modified Version, as the publisher. D. Preserve all the copyright notices of the Document. E. Add an appropriate copyright notice for your modifications adjacent to the other copyright notices. F. Include, immediately after the copyright notices, a license notice giving the public permission to use the Modified Version under the terms of this License, in the form shown in the Addendum below. G. Preserve in that license notice the full lists of Invariant Sections and required Cover Texts given in the Document's license notice. H. Include an unaltered copy of this License. I. Preserve the section entitled "History", and its title, and add to it an item stating at least the title, year, new authors, and publisher of the Modified Version as given on the Title Page. If there is no section entitled "History" in the Document, create one stating the title, year, authors, and publisher of the Document as given on its Title Page, then add an item describing the Modified Version as stated in the previous sentence. J. Preserve the network location, if any, given in the Document for public access to a Transparent copy of the Document, and likewise the network locations given in the Document for previous versions it was based on. These may be placed in the "History" section. You may omit a network location for a work that was published at least four years before the Document itself, or if the original publisher of the version it refers to gives permission. K. In any section entitled "Acknowledgements" or "Dedications", preserve the section's title, and preserve in the section all the substance and tone of each of the contributor acknowledgements and/or dedications given therein. L. Preserve all the Invariant Sections of the Document, unaltered in their text and in their titles. Section numbers or the equivalent are not considered part of the section titles. M. Delete any section entitled "Endorsements". Such a section may not be included in the Modified Version. N. Do not retitle any existing section as "Endorsements" or to conflict in title with any Invariant Section.
If the Modified Version includes new front-matter sections or appendices that qualify as Secondary Sections and contain no material copied from the Document, you may at your option designate some or all of these sections as invariant. To do this, add their titles to the list of Invariant Sections in the Modified Version's license notice. These titles must be distinct from any other section titles.
You may add a section entitled "Endorsements", provided it contains nothing but endorsements of your Modified Version by various parties-for example, statements of peer review or that the text has been approved by an organization as the authoritative definition of a standard.
You may add a passage of up to five words as a Front-Cover Text, and a passage of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts in the Modified Version. Only one passage of Front-Cover Text and one of Back-Cover Text may be added by (or through arrangements made by) any one entity. If the Document already includes a cover text for the same cover, previously added by you or by arrangement made by the same entity you are acting on behalf of, you may not add another; but you may replace the old one, on explicit permission from the previous publisher that added the old one.
The author(s) and publisher(s) of the Document do not by this License give permission to use their names for publicity for or to assert or imply endorsement of any Modified Version.
5. COMBINING DOCUMENTS
You may combine the Document with other documents released under this License, under the terms defined in section 4 above for modified versions, provided that you include in the combination all of the Invariant Sections of all of the original documents, unmodified, and list them all as Invariant Sections of your combined work in its license notice.
The combined work need only contain one copy of this License, and multiple identical Invariant Sections may be replaced with a single copy. If there are multiple Invariant Sections with the same name but different contents, make the title of each such section unique by adding at the end of it, in parentheses, the name of the original author or publisher of that section if known, or else a unique number. Make the same adjustment to the section titles in the list of Invariant Sections in the license notice of the combined work.
In the combination, you must combine any sections entitled "History" in the various original documents, forming one section entitled "History"; likewise combine any sections entitled "Acknowledgements", and any sections entitled "Dedications". You must delete all sections entitled "Endorsements."
6. COLLECTIONS OF DOCUMENTS
You may make a collection consisting of the Document and other documents released under this License, and replace the individual copies of this License in the various documents with a single copy that is included in the collection, provided that you follow the rules of this License for verbatim copying of each of the documents in all other respects.
You may extract a single document from such a collection, and distribute it individually under this License, provided you insert a copy of this License into the extracted document, and follow this License in all other respects regarding verbatim copying of that document.
7. AGGREGATION WITH INDEPENDENT WORKS
A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, does not as a whole count as a Modified Version of the Document, provided no compilation copyright is claimed for the compilation. Such a compilation is called an "aggregate", and this License does not apply to the other self-contained works thus compiled with the Document, on account of their being thus compiled, if they are not themselves derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to these copies of the Document, then if the Document is less than one quarter of the entire aggregate, the Document's Cover Texts may be placed on covers that surround only the Document within the aggregate. Otherwise they must appear on covers around the whole aggregate.
8. TRANSLATION
Translation is considered a kind of modification, so you may distribute translations of the Document under the terms of section 4. Replacing Invariant Sections with translations requires special permission from their copyright holders, but you may include translations of some or all Invariant Sections in addition to the original versions of these Invariant Sections. You may include a translation of this License provided that you also include the original English version of this License. In case of a disagreement between the translation and the original English version of this License, the original English version will prevail.
9. TERMINATION
You may not copy, modify, sublicense, or distribute the Document except as expressly provided for under this License. Any other attempt to copy, modify, sublicense or distribute the Document is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance.
10. FUTURE REVISIONS OF THIS LICENSE
The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See http://www.gnu.org/copyleft/.
Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation.
ADDENDUM: How to use this License for your documents
To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and
license notices just after the title page:
Copyright (c) YEAR YOUR NAME. 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 the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. A copy of the license is included in the section entitled "GNU Free Documentation License".
If you have no Invariant Sections, write "with no Invariant Sections" instead of saying which ones are invariant. If you have no Front-Cover Texts, write "no Front-Cover Texts" instead of "Front-Cover Texts being LIST"; likewise for Back-Cover Texts.
If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.