I think I'm the neweset newbie here...was trying to do simple video editing of combining 2 separate MP4s into one using this application. Each file has the lowest settings like
Video data rate: 15 fps at 320x240 size with 216 Kbps,
Audio data rate: 48 kbps, 24KHz and 16 Bit Mono.

I chose the lowest settings to keep the size small. However, when I try to combine the 2 MP4s into one, I can't change the output to a lower setting. The output file has the following setting of
video data rate: 30fps at 320x240 size with 768 Kbps
Audio data rate: 128kbps, 24KHz ad 16 Bit Stereo

Can I change this preset settings to anything that I want? The output file size is too big for me.