mpeg2video problem with FFMPeg

[Marwood]

Hi guys I use Linux and a while ago used the following command to convert a TV rip into a playable MPG on Rockbox:
ffmpeg -i file.avi -s 320x240 -vcodec mpeg2video -b 200k -ab 192k -ac 2 -ar 44100 -acodec libmp3lame file.mpg

It worked great but today I ran it and got this error:
Unknown encoder 'mpeg2video'

I'm not sure what's changed.  Any ideas?  Or is there something else I can use instead of mpeg2video?

Thanks.

[Chronon]

It seems this is a problem for an ffmpeg support channel -- or maybe some forums for the distribution that you use.  A google search returns a couple of hits that may be useful for you. 

[Marwood]

I resolved the issue by installing "libavcodec-unstripped-51"

Next, I encountered an error related to the use of mp3 as an audio codec in my command so I used libmp3lame instead. Hope this works for other Ubuntu users who may get this problem.