I’m editing with a crap machine without a dedicated GPU so I think that’s the main issue. Just created a low res H264 and works absolutely fine if I import the actual proxy file and match the sequence settings to the proxy file itself. As soon as I create a sequence matching the source clip and toggle on the proxies it starts to lag. guess ill just have to edit the proxies in their own native format then manually relink them to the high res clips when it’s all done.
thanks for your help.
Ben