Workflow for recording screen captures and converting into a format suitable for upload to YouTube.

For Timelapse (no audio)

Run recordmydesktop

recordmydesktop --onthe-fly-encoding --no-sound --fps=1

Convert to mkv

ffmpeg -i input.ogv -c copy output.mkv

Merge multiple files using mkvmergegui, set desired framerate and add any audio tracks.

mmg