ffmpeg usage.

Using ffmpeg to make movies is much faster than using ImageJ. The followings are the commonly used commands:

>> ffmpeg -r 60 -i %d.jpg -sameq -s vga out.mp4

-r 60 means the frame rate of the movie is 60;
-i %d.jpg: inputs are jpg sequences.
-sameq: make sure that the movie frames are the same quality as the input sequential images.
-s vga: constrains the size of the frames to vga size, which is 640x480.

compile Qt4.6 on snow leopard.

I had trouble with the binary files, both 4.5 and 4.6Beta. The installer freezes at "validating packages". Finally I decided to compile the source files. The first trial failed with a lot of errors related with tiff files. Then I used the following command and successfully compiled the file.

>> ./configure -qt-libtiff -sdk

>> make

>> sudo make install

So far it seems to work well.

binutils on snow leopard

use the following when config:

>> ./configure --disable-werror

otherwise it won't work.

compile openCV 2.0 on snow leopard

In the command window:


>> CXXFLAGS="-m32"
>>  LDFLAGS="-m32"
>>  ./configure


After that, do the following:


>> make
>> sudo make install (run as root). 

enable root account in Mac (10.6)

The easiest way to enable root is to start a terminal session, and type:

sudo passwd root

You will be prompted for a new password to enable root access.

If it does not work, following next steps:

1. Open the Directory Utility located in /System/Library/CoreServices/.
2. Unlock the application by clicking the padlock icon and entering your Administrator login.
3. From the Edit menu, select Enable Root User.
4. Chose Change Root Password from the Edit menu and chose a password for the root user.

That’s it! Make sure to lock the application by clicking the padlock icon.

QLabel

when set the qlabel pixmap, use the following:

 ui->label->setPixmap(QPixmap::fromImage(image));

QPixmap::fromImage is a static function.

The following codes do not seem to work:

QPixmap pixmap;

pixmap.fromImage(image);

ui->label->setPixmap(pixmap);

How to Build Up a Bulleted List in Apple Keynote ’09

http://www.ehow.com/how_4929870_build-up-bulleted-list-keynote.html