Choose one of the predefined profiles or set the output properties, but for novice users it is recommended to select one of the default iPhone profiles.
If you would like to change the video file parameters you can edit the following information
Audio: Frequency response: 20 Hz to 20,000 Hz;
Audio formats supported: AAC (16 to 320 Kbps), Protected AAC (from iTunes Music Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2, 3 and 4), Apple Lossless, AIFF and WAV; upgradable firmware enables support for future audio formats
Video support: H.264 video: up to 768 Kbps, 320 x 240, 30 frames per sec., Baseline Profile up to Level 1.3 with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4 and .mov file formats MPEG-4 video: up to 2.5 mbps, 480 x 480, 30 frames per sec., Simple Profile with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4 and .mov file formats
Click on "Convert"