#17 Better mpeg2enc support

[Davide]

It would be nice to replace the old mpeg2enc plugin
with the new version of the mjpegtools project which is
more rich of features. To do that, it will be necessary
to add support for YUV4MPEG file format...

[jlwilks]

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I have created a rough patch so cinelerra uses an external
mpeg2enc if anyone is interested. I've only tested it on pal
dvds etc. but it works ok
see http//:www.johnwilks.com
and look at the stuff page