Pioneer DVR-LX61D Service Manual page 80

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Note 2:
ERROR information
If any error code is indicated in parentheses, a playback error has been generated. Each error code is displayed in its fixed
A
position. (The duration of error-code indication is short, because when an error is generated, playback of the next file is
automatically attempted.)
Description of error codes
FMT : The file cannot be recognized as having an MP4 file format.
DEC : Although the file is recognized as playable, the decoder could not decode the data of the file correctly.
CH : The number of channels is not supported.
QNT : The quantization bit rate is not supported.
BPS : The bit rate is not supported.
FS : The sampling frequency is not supported.
BOX : The file format is judged to be not supported upon analysis of the MP4 file.
PRF : The Advanced Audio Codec (AAC) is judged to be not playable.
B
MEM : The system failed to secure the amount of memory required for playback.
Possible causes for errors and how to diagnose
Possible causes for an FMT error
Possible cause 1: Impossible box size for the first box of an MP4 format file
How to diagnose: Check the binary data of the file with which an FMT error was generated. Consider the first 4 bytes at the
beginning of the file as the box size and check if the size is 0 or a value that exceeds the file size.
If the box size is 1, consider the 8 bytes from the 8th byte from the beginning as the box size. Check if the
size is 0 or a value that exceeds the file size.
C How to check the box size:
For checking the binary data of the file, use the Binary Editor of the PC tools.
The figure below shows the binary data of an MPEG4 file:
D
BOX size
With this file, the first box is an "ftyp" box, and its size is 0x18 bytes (the figure in the frame in red).
In a case of an FMT error, the first box size is 0 or a value that exceeds the file size (impossible value for the MPEG4 file format).
E
If the box size is 1, the data that are framed in dotted green lines in the above figure are treated as the box size.
Possible cause 2: Failure in data reading during file analysis
How to diagnose: Check the ATA error log on the Debug screen.
How to check the ATA error log:
Display the ATA error log page by pressing [ESC], [DISP], [2], then [DIG/ANA], in that order.
The first 4 digits denote date, and the next 6 digits denote time. Check if the date and time match those when an error was
generated during AAC playback.
You can switch between Writer and HDD data, using [FRM/TIM]. Switch according to the type of medium being played back.
For USB, there is no log for reading errors.
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DVR-LX61D
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