Convert AVI to MP4 with ffmpeg

Use this command:

ffmpeg -i input_file.avi -c:v libx264 -preset slow -crf 22 -c:a libfaac -b:a 128k output_file.mp4

Remove all backup files ending with ~ recursively

find . -type f -name '*~' -delete

How to clean up svn repo from ._* (dot underscore) files on mac

This is how I do that:

$ find . -name ".svn" -prune -o -name "._*" -exec svn del {} \;
$ svn ci