I need a video format converstion software for X264

I need a software that can convert H264 AVI recordings into editable WMV/MP4 video files for Sony Vegas pro.
Same 3200x900 source frame size, and same or better bitrate.
Does anyone know anything that can do this reliably?
This is the only video codec i can record in for long play sessions as a replacement to every other recording format, because this records video without issue or error at a good file size and great framerate.

I'm currently using any video converter ultimate which doesn't really work at all for what i need to do.

My display is 3200x900 what i game on, and I would like to record and convert and edit these videos.

Have you tried Format Factory? Or Handbrake?

Seconding Handbrake for transcoding.

I'm trying WinFF atm, which works for converting, but it has some blocky issues with quality. But its wicked fast.
I'll try handbreak in a bit.

You can always grab ffmpeg and mess around with the command line. Handbrake does the job and uses ffmpeg, but can be limiting/confusing at times. I found just using ffmpeg raw to be easier to mess with.

You tried Digiber software? http://www.digiber.com, that always used to be a reliable converter whenever I tried it.

Hello,

Have you tried VirtualDub? I read it can convert x264 with the codec downloaded. It's free too. You can read more on it by clicking here. Hope this helps.

Avidmux all day once you get the hang of it

I tried out WinFF and it does exactly what I needed it to do and very fast too.

I saw it on a thread here on TekSyndicate so even though I didnt get the answer in the thread, i certainly got the answer from here,

Thanks everyone.