How to make a video for submission

    2019年09月19日 字数:823

On macOS, we need to follow these steps to make a video for paper submission:

  • use keynote to make slides and animations
  • keynote has a record slide play function, it also can show notes
  • after exporting the video, drag it to keynote again to change aspect ratio to widescreen
  • use HandBrake to compress the video to within 20MB, frame rate > 20
  • use ffmpeg -i video_name to check frame rate

For Ubuntu, we can use RecordMyDesktop to record screen. Its output format is ogv, which can be coverted to avi via ffmpeg as in here

ffmpeg -i input.ogv output.avi
  • we can also convert .gif to video on ubuntu by
    ffmpeg -i sem_track_images.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" video.mp4
  • we can concert .gif to .png by
    convert animated.gif output.png