@echo off

for %%a in ("*.mpg") do mencoder %%a -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -ovc lavc -lavcopts vcodec=flv:vbitrate=350 -oac mp3lame -lameopts abr:br=56 -srate 22050 -vf scale=320:-3 -o %%~na.flv
for %%a in ("*.avi") do mencoder %%a -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -ovc lavc -lavcopts vcodec=flv:vbitrate=350 -oac mp3lame -lameopts abr:br=56 -srate 22050 -vf scale=320:-3 -o %%~na.flv
for %%a in ("*.wmv") do mencoder %%a -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -ovc lavc -lavcopts vcodec=flv:vbitrate=350 -oac mp3lame -lameopts abr:br=56 -srate 22050 -vf scale=320:-3 -o %%~na.flv
for %%a in ("*.mov") do mencoder %%a -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -ovc lavc -lavcopts vcodec=flv:vbitrate=350 -oac mp3lame -lameopts abr:br=56 -srate 22050 -vf scale=320:-3 -o %%~na.flv

cls

@echo         Done (I Hope)
pause