Did you know you can access all the information store in a JPG/PNG/GIF file from the command line? Install the ImageMagick package and do this: identify -verbose image_file.jpg The output will be something llike this: Image: image_file.jpg Format: JPEG (Joint Photographic Experts Group JFIF format) Class: DirectClass Geometry: 640×480+0+0 Type: TrueColor Endianess: Undefined Colorspace: RGB … Read More »
Some videos you download might not have such a high audio volume, even with alsamixer set to 100%. There’s a trick for this. Start your video with mplayer -softvol -softvol-max 300 video_file.avi to boost your volume 300%. Substitute 300 with any number ranging from 10 to 10000. Be careful not to break your speakers. 100%… Read More »
This is a nice trick to easily access information about your multimedia files. Install the mplayer package then add the following to your ~/.bashrc file: idmedia(){ mplayer -identify -frames 0 -ao null -vo null -vc dummy “$@” 2>/dev/null | grep ID_ } Now run it like idmedia file.mp3 (this tip was sent in by lockw3)
To convert video files to a resolution that is adequate for a PocketPC’s screen, use mencoder. mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=200:abitrate=48 -vop scale=320:240 -oac copy -o output.avi This will transform a typical 700MB AVI file into a ~200MB size file with a 320×240 pixel resolution. mencoder -oac mp3lame -lameopts mode=3:preset=24 -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=384:keyint=250… Read More »