Nokia N810 Transcoding
For anyone who wants to transfer their recordings to the Nokia N810 Internet Tablet, you may find that getting the transcoding "just right" isn't so easy.
Most online guides suggest transcoding down to 320x240 or thereabouts. This is sub-optimal because the N810 has an 800x480 screen. However, the built-in media player(s) are very limited and picky on what they'll play back.
Using the Maemo application "Canola2" gets around the standard media player's limitations, and provides a lovely interface.
I've tried a number of permutations, and come up with the following mencoder line as the best balance of quality (size, bitrate), and reliability (frame-dropping, sync issues, etc.) Set the following as a user job (I call mine "Resize for N810"):
mencoder -o "%TITLE% - %SUBTITLE%.avi" -idx -cache 1024 -srate 32000 -oac mp3lame -lameopts vbr=3:br=96 -af volnorm -ofps 25 -ovc lavc -vf-add scale=512:304 -vf-add unsharp=c4x4:0.3:l5x5:0.5 -ffourcc FMP4 -force-avi-aspect 1.68 -lavcopts vcodec=mpeg4:vbitrate=600:autoaspect:idct=7:ildct:ilme:trell:cbp:mpeg_quant:vrc_buf_size=800:vrc_maxrate=600 "%DIR%/%FILE%"
This results in nice, playable file for both ATSC and NTSC recordings.
Feel free to add tweaks and updates to this article.