My favorite screencast solution for now is summarized here. I use the following command to do fullscreen (assume resolution is 1024×768) screencast ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 15 -s 1024×768 -i :0.0 -acodec flac -vcodec mpeg4 -sameq -y ~/out.mkv ; To restrict capture to a window, one can run to…
I came across broken dependency trying to install wine. This happens after I try to install Intel Linux driver. Somehow it uninstalled wine and I couldn’t reinstall it. The problem is probably due to the “newer version” of applications I installed before I upgrade the machine from 10.04. It took me many hours finding a…
It takes me quite a while for me to figure out how to clone my screen to the projector. The default setting (two separate screens) may be reasonable for power point presentation. But I would like to take advantage of the stylus during my presentation. Cloning the display is of course a better choice for…
Got my cheap used X61 but the touchscreen is way off. I tried to calibrate it with this and this post but it just doesn’t work in my case. To be fair, xinput-calibrator suggested by the posts is very useful. Just the calibrated data is not registered. After some more search, find the command xsetwacom….
Just installed another 12.04 to a X61 tablet from ebay. It is one of my favorite machine as I can write notes on that and it is cheap ($150 from ebay). And with xournal, I don’t even need to print out stuff and rescan if I need to sign some document (just use the annotate…
My ubuntu box does not always configure wireless connection correctly. Luckily, setting connection on command line is rather easy. I followed the comment by Savage for this guide (or I guess this one is kind of the same). It didn’t work the first shot for me. But it worked after some slight modifications. You may have a different device,…
After some trial and error and reading some other posts, I finally manage to capture screencast of a selected window with ffmpeg under 10.04. I am using the native ffmpeg from ubuntu and so recompiling is not needed. The command I’m using is as below. ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r…
I was trying to show some slides in my dropbox folder to my collaborator with my android tablet. I only have the pptx file and it displays so slowly on my ASUS transformer. It came to me maybe I can connect to my desktop in office remotely to convert the slides to pdf. I did…
It appears that YouTube occasionally hiccups on some ogv files and produces green screen. The following may not be the best solution. But it almost always solves the problem by first transcoding the video to avi. In linux, it can be done by mencoder as follows mencoder input.ogg -ovc xvid -oac mp3lame -xvidencopts pass=1 -o…
I have a JVC HD camcorder to video tape some presentations. The webcam is not bad but the AC in our room is just too noisy. As I mentioned in a previous post, one can easily remove noise using Audacity. However, the video from the my camcorder has the annoying MTS format. It took me…