View source for LinuxScreenCaptureMovieNotes

To create the Slicer demo videos, used gtk-recordmydesktop (ubuntu package will pull the full reqs). Set video to 100% quality. Under Preferences, set appropriate frames per second, and VERY IMPORTANT: check the box marked "Full shots every frame" (otherwise it will attempt to interpolate capture, giving very bad quality for ie realtime or gl frames).


Caveat: this program only creates "oggv" format (.ogg). To convert:
Easy way: open the file(s) in "Kino" video editor. It will automagically convert to .dv format (needed for Cinelerra).

Video editing is done in "cinelerra" (actually cinelerra-cv. there may be two versions in the repo but you want cv).

To do video overlay: we used the easy way, which was to record in Audacity (note: crashes often <> save often!) This gives a nice waveform and easy editor tools. Export the audio as something simple like wav for import to cinelerra. 

Editing audio: be sure to "disarm" the video tracks in cinelerra (use the little red button to the left of the track). Other wise any changes (ie cuts!!) will be applied to the video as well. Once video is disarmed, the audio tracks may be manipulated without modifying the video.

Export notes: once the video clips (and any audio) are finished in cinelerrra, use File->Render to create a "finalized" movie. Prior to this, cinelerra only stores track timing information in the .xml files -- it doesn't change/create any video. For most of the render formats, there MUST BE TWO AUDIO CHANNELS (actual tracks prob not necessary). Otherwise there will be some opaque coding errors. Set the render format to DV.

Next, convert this DV video (high quality) to something else high quality that windows can read. This should work IF XVID CODEC is installed on the Windows machine:

ffmpeg -i NeuroVideo4.dv -vcodec libxvid -b 2000k -ac 2 -ab 128k -vtag DX50 -qmin 5 NeuroVideo4.avi

Could also try m2v format.

Now open the resulting .avi file with Windows Media Encoder (free download) and select the appropriate options (2 MB DVD quality works well and file size is ok).