I'm trying to convert a Quicktime DV50 movie to FLV. I've checked the "invert mapping" box in the audio tab. The encode appears to be working, but the end result is a very choppy FLV file that's only playing back about 4 fps. A conversion from a Quicktime Photo JPEG movie with the same FLV settings works perfectly, playing back at the native 29.97 rate.

I'm using the latest version of FFMPEGX on Mac OS 10.4.8.

Any ideas?

Kevin