A question about x264 lossless

[yesgrey]

Hi,
Let's say I have a VC1 file with 200MB. If I encode it with x264 lossless would I get the same video quality (since it's lossless) and almost the same video size?

Sorry if it's a very dumb question...

[akupenguin]

You would get the same quality (since it's lossless), and a much bigger file (since lossless codecs don't compress nearly as much as lossy).

[Sagekilla]

It depends really.. If you go all out insane max settings possible then you may see a very small file size reduction.

In my personal testing with MPEG-2 source files (DVDs), the encoded sample at lossless quality is almost ALWAYS bigger then the originals.

[yesgrey]

I expected that would be possible the same size, since the base video is already compressed... or could it happen that the VC1 decoding add some kind of noise/artifacts that would cause a problem for the x264 lossless encoding?

How much time do you think it would take with those "insane" settings?

Do you know if already is available any x264 profile for this situation?

Thanks.

[Manao]

Whatever the settings, you'll likely get a bigger file. If you want lossless, don't recompress the file.

[yesgrey]

Since mkvtoolnix does not accept vc1 files I was considering the possibility of transcoding it losslessly to h264, which is accepted. Well, I think it's better waiting for vc1 support...

Thanks for your answers.