Posts tagged: video

Squishy Bugs Gameplay

I finally figured out how to record video on my computer (no audio). So here’s a session of Squishy Bugs, in case you’ve wanted to see it in action before downloading and playing this relatively small in file-size and free game.

Capturing game footage with FFmpeg in Ubuntu

It’s surprisingly easier than I expected. I’d previously thought FFmpeg was so complicated that I looked everywhere else for a decent video capture tool in Linux.

I found the following explanation at qubodup’s blog. And he, in turn, found the tutorial from a much larger blog post.

  1. Start the game/open the window you want to record (I expect it should be windowed for the following instructions to make sense).
  2. In a terminal, enter ‘xwininfo’ and then click on the window you will be recording.
  3. You’ll see a bunch of information pop up in the window.
    1. If you want to capture window decorations, also make note of the values in -geometry at the bottom. (width, height, upper-left X, upper-left Y)
    2. If you want to capture only the window contents, make note of Width, Height, Absolute upper-left X, Absolute upper-left Y.
  4. In a terminal, type/paste the following

    ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s WIDTHxHEIGHT -i :0.0+XPOSITION,YPOSITION -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mkv

  5. Replace the capitals with the values you noted previously.
  6. Press enter to begin recording. When done, press Ctrl-C in the terminal.
  7. In a terminal, type the following to encode the video

    ffmpeg -i output.mkv -acodec libmp3lame -ab 128k -ac 2 -vcodec libx264 -vpre hq -crf 22 -threads 0 our-final-product.mp4

I’ve yet to get the audio to record properly, but at least the video records flawlessly.

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