If you have Quicktime 7.0 with the extra mpeg codecs installed (about $20 extra) You can use MPEG Stream Clip v1.0.1 (freeware) which will very, very quickly convert your m2v files to mpeg2 files (without recompression) that Vegas can use. If you don’t want to spend the dollars with Apple download QuicktimeAlt which is a freeware alternative to Apple’s Quicktime. Make sure you tick the ‘extra codecs’ checkbox when you install QuicktimeAlt, this will allow MPEG Stream Clip to do the conversions for you. It can also demux out AC3 audio and encode very good looking H264 clips, very good!
BTW, to use the above combo you will have to unistall the ‘official’ apple Quicktime to run QuicktimeAlt. QuicktimeAlt explains all this in its documentation and can uninstall Apple’s Quicktime as it installs. I find it a better program as it doesn’t invade your system like QT and doesn’t have those constant annoying nag screens.
Proviso: Make sure you have the latest Windows updates installed as there is one which fixes some Quicktime issues (KB931398) and it is needed to run MPEG Stream Clip. If you don’t have it the install routine will tell you.
Links:
https://www.squared5.com
for MPEG Stream Clip
and
https://www.free-codecs.com/download/QuickTime_Alternative.htm
for QuicktimeAlt
Chris Young
CYV Productions
Sydney