question on changing matrices with restream

[mgh]

Restream (http://www.videohelp.com/tools/Restream) is a well known tool for correcting wrong AR info or wrong field order in mpeg2 streams by rewriting header info.
It also incorporates the ability to change the matrices.
http://www.videohelp.com/toolsimages/restream_231.jpg

My question is can anything be done to a mpeg2 video to 'improve' it by changing the matrices?

[manono]

My question is can anything be done to a mpeg2 video to 'improve' it by changing the matrices?
I tried doing just that once, just to see what would happen. The results weren't pretty. Take a short DVD video you might have on the hard drive - some extra or something - demux the M2V and change the matrix. It won't take long. Then you'll know the answer for sure.

[manolito]

Quote from the Restream manual:
- If you want to add/change matrices, you should have also encoded your file
with the specific matrices. If you don't, you'll most likely destroy proper
decoding of your video-file.

Cheers
manolito