So my copy of Premiere Pro CS5.5 has stopped exporting to quicktime H.264. I have updated all adobe products and quicktime but still no joy. It will export to most other quicktime formats and the H.261 and H.263 formats. All that is spewed out is "Unknown Error"
Feeling a bit frustrated by all this so any ideas most welcome.
The standard for H.264 files is the MP4 container. Try not using QuickTime.