FS#10027 - wma decoder cannot work when the bitrate of audio file is 20kbps

Attached to Project: Rockbox
Opened by lynn cao (lynn_cao) - Monday, 16 March 2009, 06:53 GMT
Last edited by Andree Buschmann (Buschel) - Thursday, 03 February 2011, 11:06 GMT
Task Type Bugs
Category Codecs
Status Closed
Assigned To No-one
Operating System All players
Severity Low
Priority Normal
Reported Version Version 3.1
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No



i find wma decoder cannot work when the bitrate of audio file is 20kbps.

but 32kbps can.

my file:
This task depends upon

Closed by  Andree Buschmann (Buschel)
Thursday, 03 February 2011, 11:06 GMT
Reason for closing:  Works For Me
Additional comments about closing:  Both attached files work fine using r29209.
Comment by lynn cao (lynn_cao) - Monday, 16 March 2009, 06:59 GMT
actually the 20kbps file can be played,but the perfemance is not good.
when i play the 20kbps file with media player,everything is ok.

Is there any bug of playing low bitrate wma files ?
Comment by MichaelGiacomelli (saratoga) - Saturday, 21 March 2009, 02:20 GMT
I don't think its the bitrate, rather that ASF file seems to parse badly in Rockbox. It actually doesn't quite parse right in VLC either, but we do a lot worse. I'll put it on my todo list, but in the mean time I bet you could fix such a file by decoding the ASF stream (but not the WMA data) and putting it back into a new ASF file. Unfortunately, I'm at a loss for an easy tool to do this losslessly.
Comment by lynn cao (lynn_cao) - Monday, 23 March 2009, 11:13 GMT
hi michael,
thanks for you reply.

when testing ,i print some debug msgs. in wmadeci.c ,line 1174.
ptr sometimes equal to eptr .

what does it mean?when playing other higher bitrate media files ,i will not see this kind of debug msg.

Comment by sumit goyal (cheekoo) - Friday, 21 August 2009, 05:42 GMT
Hello! I love the tool, but only yesterday I found out that it is not able to play wma files having bitrate = 20kbps.

Can i request the dev/screen team to bump the severity of this bug? I would love love to play those files with rockbox and can not go back to ipod's os to play those as these songs have not been transferred using itunes or anyother ipod compliant method(although i am not sure if ipod's firmware is gonna play them.. i really doubt that too).

Comment by MichaelGiacomelli (saratoga) - Friday, 21 August 2009, 17:21 GMT

As i said above, 20kps files work fine, the problem with the above file was the ASF container, not the WMA bitstream. If you can post your file it would be interesting to look at.
Comment by sumit goyal (cheekoo) - Saturday, 22 August 2009, 03:06 GMT
Attaching the file. Please check.
Comment by sumit goyal (cheekoo) - Saturday, 29 August 2009, 14:19 GMT
Hello Michael, any updates? were you able to look at the file?