LinuxQuestions.org - How do I combining OGV files into one big file

I've tried several methods without success. These OGV files are 7 parts of a single screen cast.

I tried ffmpeg but every option I try I either get crappy video or the audio/video is out of sync.

Latest attempt was:

Code:

ffmpeg -v 9 -i XDF_Demo-PART-0-video.ogg -r 15 frames-part1/XDF_Demo_%06d.png

But that failed because the png quality sucked.

mplayer and mencoder I mostly just couldn't get it to play the files together.

Anyone know an easy way to combined these files so media players and html5 can play it in one pass?