Tag: ogv

Fixing ogv problem on YouTube

Posted on by phsamuel

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…

Making a noise free screencast

Posted on by phsamuel

Ubuntu has very convenient function to generate screencast. My favorite is gtk-recordMyDesktop. However, my mic isn’t very high quality and my screencast always ends up with annoying background noise. Actually, this noise can be easily removed by denoising tools such as Audacity. One just needs to exact the audio track, denoise it with Audacity, and…