C++ tutorials

cout <<setiosflags(ios::fixed)<<setprecision(2) <<"t=" <<setw(5)<<mytime/1000<<" dt=" <<setw(3)<<dif<<" fps=" <<setw(6)<<fps<<" incr=" <<setw(3)<<incr<<"        \r"<<flush;
 

output formatting in c++ http://arachnoid.com/cpptutor/student3.html

Other c++ online tutorials

• http://www.learncpp.com/
• http://www.cplusplus.com/doc/tutorial/

convert a mpeg4 .mp4 video en h264 quicktime .mov

ffmpeg -i film.mp4 -f mov -acodec libfaac -ab 128k  -vcodec libx264  -preset medium  -y film.mov

ffmpeg commands to create a "drawing" style video

Enhancing local contrast and creating lines

ffmpeg -ss 60 -i film.avi -vf hue=s=0,\
lutyuv="y=2*val",smartblur=1:1:0,edgedetect=low=0.1:high=0.2\
-vcodec huffyuv -pix_fmt bgra -y dessin.avi

To extract an alpha channel

ffmpeg -i  film.avi -vf alphaextract -vcodec huffyuv -y alpha.avi

To merge a alpha channel to an existing movie

ffmpeg -i dessin.avi -vf "movie=alpha.avi[alpha];[in][alpha]alphamerge[out]" -vcodec huffyuv -y dessin2alpha.avi

Performance on Mint LMDE

My system (Mint LMDE 64 bits AMD PhenomII X4) was running at the base CPU Freq 800 MHz instead of 3.4GHz

I followed the advice mentionned here and with synaptic removed all cpufreqd from my system and according to system profiler the processors frequency now seems ok

nedit uggly fonts

nedit was missing the xorg fonts
installing X.Org on my LMDE solved the problem

Linux Mint LMDE

Ubuntu 10.10 ppa is not accessible since beginning of 2013, I switched to Linux Mint Debian (LMDE) kernel version 3.2.0-2-amd64

Installed AMD driver legacy 12.6  compatible with the current kernel

Everything works fine