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User_Manual_RP3001k.doc
Video Frame Size
The DF-1710’s movie playback software has several video screen size modes that it can use for playing movies:
320x240 pixels
400x300 pixels
640x480 pixels
800x600 pixels
1024x768 pixels
When playing back a movie, the DF-1710 automatically selects the lowest possible video mode that will fit the
movie at its original size. The movie is centered onscreen, with black borders if necessary.
For the smoothest possible full-screen playback, you should encode your videos at 320x240 pixels. Content
that has been extracted from or encoded for Video CD (VCD) media will be at 352x240 or 352x288 pixels, and
consequently will be played in the 400x300 video mode with small borders around the edge.
You can scale content up to fill the screen (aspect ratio is preserved) by specifying the "zoom" option, e.g.:
mymovies/Demo.mpg,zoom
Using this parameter will, however, reduce the smoothness of playback and in extreme cases may cause loss
of audio sync.
The zoom option can be used in a setdefaults line and will be remembered correctly if you wish to scale up all
movies in a slideshow.
Notes:
(1) Although the DF-1710 can play back Super-VCD (480x480) type content, this format is not recommended,
as the aspect ratio will be wrong for the DF-1710's screen.
(2) Extremely large movies, particularly AVI files, may play back only the sound track, or may experience loss
of audio sync. This occurs because the DF-1710 tries to keep the video up with the audio by skipping video
frames. If the movie is sufficiently big and complicated, the decoder will never have enough free time to
update the screen, so the movie will appear not to be playing.
(3) It is normal for the video playback to "skip" somewhat while you are transferring files to or from the DF-
1710 over the network.
(4) While the DF-1710 is playing movies, it is slightly less responsive to button presses. You may need to hold
buttons down slightly longer than usual for the press to "register".
Transcoding to MPEG From Other Video Formats
The process of converting from one video format to another is referred to as transcoding. Various software
programs are available for performing this task, and using them you can convert your non-MPEG-1 video
content to MPEG-1. The details of the operation of these programs is beyond the scope of this manual, but
here are some guidelines to keep in mind when transcoding:
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The larger the video frame size, the slower playback will be. You may want to experiment with various
frame sizes 320 x 240 is optimal, as is a frame rate of 29.97 or 30 FPS. Frame rates higher than 30 fps are
