How to crack lost rar/zip/7zip archive passwords?
Download rarcrack sources from http://rarcrack.sourceforge.net/ . Unarchive the file, and compile it:
$ make
$ make install
To crack the lost password use it as in the example:
$ rarcrack your_encrypted_archive.ext [--threads thread_num] [--type rar|zip|7z]
If you get any problems, visit its official web site.
How to convert MOV, MP4 video files to AVI?
$ sudo apt-get install ffmpeg
MOV->AVI: $ ffmpeg -i input.mov -sameq -f avi -acodec pcm_u8 output.avi
MP4 can be converted to AVI in the same way. Sometimes (for me – in the case of mp4->avi converting) the output avi file seems to be rather big, so you can encode the video with divx codec:
$ ffmpeg -i output.avi -s 640×480 -vcodec msmpeg4v2 output2.avi
Those tricks work fine for me (with my camera and mobile phone).
To convert videos with the wanted level of quality, you can play with -sameq, -s (size), -vcodec options. For more much info visit the official ffmpeg site.
P.S. some ffmpeg recipes for every day can be found here
