I'm using ubuntu 10.04, but this should be simular for other distros. ffmpeg has a multithread version out. Speeds up encoding 2-4x faster if using a dual, triple, or quad cpu. Here is what I did:

git clone git://git.libav.org/libav.git
cd libav
./configure
make

git clone git://gitorious.org/~astrange/ffmpeg/ffmpeg-mt.git

cd ffmpeg*

./configure --enable-nonfree --disable-stripping --enable-avfilter --enable-version3 --enable-shared --enable-gpl --enable-libfaac --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-x11grab --enable-libx264 --enable-libtheora --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab

make


Run the kdenlive Config Wizard

From ffmpeg homepage:
Seems like FFmpeg-mt is now part of the official FFmpeg branch.

<== quote
March 21, 2011 Today FFmpeg-mt, the multithreaded decoding branch, has been merged into FFmpeg. This has been a long awaited merge, and we would like to thank Alexander Strange for his patience and hard work.
==>

There was attempt to fork ffmpeg these last days.
The main team accepted ffmpeg-mt two days later.
Maybe it is related :)

The acceptance of the mt patch as a great enhancement for the future.
It could open the door to other developments like CUDA or the like.

Great.

Hi. how are you?

That means that building from latest libav git repository there is no need to build ffmpeg-mt?

How can I know if ffmpeg it's transcoding with multiple cores?

Thanks

You should be able to tell by running top in a command shell.

Dave