Multimedia encoding

VirtualDub

(comes with mplayer).

http://gentoo-wiki.com/HOWTO_Mencoder_Introduction_Guide

Example with xvid codec :

mencoder \
  -ovc xvid -xvidencopts bitrate=800:quant_type=mpeg:gmc:chroma_opt:vhq=4:bvhq=1:trellis \
  -oac mp3lame -lameopts abr:br=128 \
  -vf yadif=0 \
  K7-1-DV-1.avi K7-1-DV-2.avi -o rush1.avi

Options :

• ovc = video codec
  • trellis : speeds up encoding
• oac = audio codec
• vf = video filters
  • pp = post processing subfilters
  • yadif : deinterlace

A GUI easier to use, like VitualDub for Windows.

⇒ lame

To encode from wav to mp3 in “speech” quality :

lame -V2 --vbr-new -q0 --lowpass 10 -s 22.05 -b32 file.wav file.mp3

⇒ oggenc

To encode from wav to ogg in “speech” quality :

oggenc -b 32 --downmix --resample 22050 file.wav file.ogg

Converting from ogg to ogg in “speech” quality :

oggdec -b 16 -R file.ogg -o - | oggenc -r -B 16 -C 1 -b 32 --resample 22050 - -o file_recomp.ogg