I've recently started using MPEG Streamclip to convert my JVC Everio video from MOD to DV. No problems in that conversion. I've purchased and downloaded the MPEG-2 Playback component. I would like to use MPEG Streamclip to convert DV directly to MPEG-4. When I attempt that conversion, I get a "can't write the movie file error". I have an Intel iMac with an external hard drive I am using to store my videos. Has anyone come across this and could recommend a solution?