Apple QuickTime 7 - Manual (Page 50)

50 Chapter 4 Exporting Files With QuickTime Pro
 3G timed text
 3GPP2 is for CDMA 2000 networks. With this format, you can use:
 MPEG-4, H.263, or H.264 video
 AAC, AMR, or QCELP audio
 3G timed text
 Movie fragments (enables playback to start sooner for longer movies, since only the
fragment, not the whole movie, must fit on the handset)
The remaining formats are provided for specific networks. With these formats, you can
restrict distribution so that a file can’t be shared from the recipient’s phone (set this
option in the Advanced pane). These formats may limit the acceptable file size or data
rate; check with the service provider for more information.
 3GPP (Mobile MP4) is for NTT DoCoMo’s “i-motion” 3G service. With this format, you
can use the 3GPP options described above.
 3GPP2 (EZmovie) is for KDDI’s 3G network service. This format provides the same
options as 3GPP2 (described above), except for AMR audio support.
 AMC (EZmovie) is for KDDI subscribers with AMC-capable phones. With this format,
you can use:
 MPEG-4 video
 QCELP audio
 KDDI’s text format
3G Video Export Options
 Video Format: If your source movie has only one video track and it is already
compressed, you can choose “Pass through” (so that the video doesn’t get
compressed again).
 Data Rate: The more kilobits per second (kbps), the better the movie quality. For
best playback, however, don’t choose a data rate higher than the available
bandwidth.
 Optimized for: If you choose H.264 from the Video Format pop-up menu, choose
your intended delivery method from the “Optimized for” pop-up menu. This setting
tells the codec how much the data rate can vary above and below the data rate you
choose.
 Image Size: If you’re sending the file to a mobile phone, choose one of the
standards. Current maintains the source material size; the resulting file may not play
on a mobile phone. To choose a size not listed in the pop-up menu, choose Custom.
 Frame Rate: In most cases, your video will look better if you choose a number that is
exactly divisible by the FPS (frames per second) of your source. For example, if your
source is captured at 30 FPS, choose a frame rate of 10 or 15. Don’t choose a rate
larger than that of your source material.