• Status Closed
  • Percent Complete
  • Task Type Bugs
  • Category Codecs
  • Assigned To No-one
  • Operating System iPod 5G
  • Severity Low
  • Priority Very Low
  • Reported Version Daily build (which?)
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by crashd - 2008-02-29
Last edited by Buschel - 2010-11-17

FS#8664 - MP4/AAC Playback problems

When trying to play certain AAC/mp4 fles Rockbox will hang or become extremely sluggish, usually resulting in a necessary reboot. In all but on occassion, the audio stream hasn’t begun.

Here’s some examples :

Closed by  Buschel
2010-11-17 18:48
Reason for closing:  Works For Me
Additional comments about closing:   Warning: Undefined array key "typography" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 371 Warning: Undefined array key "camelcase" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 407

Works for iPod Video, Clip+ and Fuze v1.

The first file (002) works fine on my Sansa e200, but the second one doesn’t play at all. This is a known problem, where long MP4/AAC files will not play at all or possibly crash Rockbox. The reason is that the decoder runs out of memory, because it doesn’t handle some data tables needed for playback and seeking in a very efficient manner (it pretty much reads the tables verbatim from the file).

I can reconfirm this bug still exists (iPod Video 60 Gig) r18335 clean install. 02 does’t play (codex error)* and 03 spins disk indefinitely. I accidently left to room and when I picked up my iPod I Burt my finger. *twip_002_aud.m4a
7fd5a580cc0b713b91599a05040e2425 (MD5sum On iPod)
f68ab251617d904a878c2f62925c6564 (Re download)
:. (File was corrupt)
Dramatization. Though it was the hottest it’s ever been before.
Good luck with Version 3.0 Thanks everyone for the wonderful firmware.

Retested both files on iPod Video 5.5G (32MB RAM) on r25137. Both files play fine, even though the disk activity is 2-3 times longer (20-25s) as normal (8-10s).

No problems with Clip+ & Fuze V1


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