Image, Photo & Video

ffmpeg -i myvideo.avi -vcodec copy -acodec libmp3lame -ab 128k -vol 5000 myvideo_louder.avi

http://howto-pages.org/ffmpeg/

http://wesleybailey.com/articles/ffmpeg-tutorial-batch-processing-video-information

http://www.linuxforums.org/articles/linux-video-conversion-using-mencoder_304.html