Video files and resolution.

1. Video formats and containers

A video file consists out of TWO seperate elements:

  • container
  • codec

The container holds the digitally encoded data and the codec is capable of decoding/encoding this digitally encoded data.

Veejay supports the AVI and the Quicktime container , with the following codecs:


  • mpjeg,mjpa,jpeg,dmb1
  • dvsd, dv, dvcp, dvhd


  • mjpeg, mjpa,jpeg,jfif,dmb1
  • dvsd, dv, dvcp, dvhd
  • i420, i422, yv16, hfyu

Raw DV

  • PAL / NTSC dvsd

Veejay can only deal with video files that consists entirely out of whole images (only I-frames). The codecs below will only work if all frames are I-frames. Otherwise, veejay will abort with an error message.

AVI / Quicktime:

  • xvid, mp4v,divx,dxsd,mp4s,m4s2
  • div3,mp43,mp42,mpg4
  • avc1,h264,x264,davc,svq1,svq3,avc1

2. Wich codec to use

MotionJPEG ( mjpeg) is the veejay codec of choice for most applications, it gives you a good tradeof between compression, quality and compatibility. If you want speed, use AVI yv16 or i420 while recording to new samples.

Tools that support MJPEG:

2. Wich resolutions to use

Veejay can do:

  • pal: 720x576
  • ntsc: 720x480
  • 1/4 pal: 360x288
  • 1/4 ntsc: 360x240

and many more, but multiples of 16 ( jpeg squares) will look best!

If you load multiple video files on the commandline, make sure that all files have the same resolution and audio properties.

3. How to convert ( transcode)
Veejay can convert dv video to mjpeg for you, however, I prefer to use mplayer for this, wich has more flexibility.

From "anything" mplayer can play to mjpeg, use:

$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o

To scale on the fly, use:

$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -vf scale=352:288 -o

consult mplayer documentation about other options, such as cropping and filtering out blocks in video.

a quick hint for bulk encoding a bunch of capture.dv files:

$ for i in `ls *dv`;do mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o `echo $i | sed s/.dv/.avi/` $i; done;

4. What is this dummy mode

Dummy mode opens up a 'color stream' to start veejay without a video file.

If you use a video file, veejay will take that file's properties as default settings for the whole session.