Whats a good software for w7 that wil work on .m2ts and do chroma key

[Onceler2]

and does not constrain the final bitrate of the m2ts file to 10Mbps(Vegas).
Thanks

[poisondeathray]

and does not constrain the final bitrate of the m2ts file to 10Mbps(Vegas).

Vegas doesn't constrain to 10Mbps if you use Mainconcept AVC. You could also use debugmode frameserver to frameserve out and use other encoders like x264 (or export a lossless intermediate). If you are making a blu-ray/AVCHD disc, don't use vegas' AVC encoder (either Mainconcept or Sony), they are not compliant and will need to be re-encoded.

great chroma key and full compositing => after effects with included keylight plugin

decent chroma key => vegas 8/9 pro chroma keyer

mediocre/bleh chroma key => premiere pro, cinegobs