sufficient media data reading rate (even with some reserve) of used data storage
drive. If reading rate is insufficient, there will be playback failures. To avoid this kind
of failures, it is advisable to store the file on a drive ensuring best reading rate and
playback the file from this device. Tip: the quickest drive is the internal hard drive of
your media player.
●
You may find a table of approximate reading rates for different kinds of drives on the
manufacturer’s site
You may evaluate the speed potential of a specific drive as follows:
Select the file from the file browser, press INFO button on RC and select “Reading
check”. The player will check the file reading and display the information on maxi-
mum possible rate of media data reading from this file. For smooth playback of the
file, this rate shall exceed the maximum file bitrate. In some cases, the reserve may
not be sufficient compared to an average file bitrate.
File bitrate may be evaluated during file playback by the player by pressing the INFO
button.
Note: the information on bitrate delivered by the player is very rough and may be
erroneous, that’s why it is advisable to use this function only during a file playback
from the drive which reading rate is a priori sufficient (e.g.: from internal EXT2/EXT3-
formatted hard disk).
During file playback by the player, the information box activated with INFO button
may display “Clipboard underflowing: ...”, displaying the duration of time span in
seconds during which underrun of input buffer of the decoder took place. If you see
this warning, it shall mean the insufficient reading rate from the drive.
During playback of a file from the built-in EXT2/EXT3-formatted hard drive, the max-
imum possible data transmission rate is reached. It is suggested to copy a problem-
atic file to the internal hard disk of the player. If during playback from the internal
hard disk the the problem disappers, it’s most probably caused by the insufficient
reading rate from the external resource used earlier.
In the same time, jumps and other playback failures may result from properties of
the media file. For instance, it may be coded so that the player’s decoder does not
simply ‘understand’ it. You may check it easily: if file playback failures happen even
when playing it from the internal hard disk, then the problem is caused by the file
itself. It is probable that with future firmware versions it may be played correctly, but
the manufacturer cannot guarantee it.
TROUBLE: Selected file is not played back, although its format seems to be sup-
ported by the player
SOLUTION: The problem may be due to several causes:
File error. To eliminate this factor you may try to play back the file with different soft-
ware player installed on your PC. If all of these players warn about the failure, then
this file may not be used.
File coding specifics. Although the DUNE player supports the majority of most pop-
ular file formats (containers and codecs), it shall not mean that it will normally play
back any file of these formats encoded by any way. Frequently, these files are made
with violation of certain rules, and although they may be correctly played back with
different embedded PC players, the DUNE player may not do this (since the HW
decoder of the player and/or player software are not designed for playback of such
‘exotic’ files).
Troubleshooting
47
Chapter 9
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