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Tasklist

FS#8664 - MP4/AAC Playback problems

Attached to Project: Rockbox
Opened by David Johnston (crashd) - Friday, 29 February 2008, 11:22 GMT+2
Task Type Bugs
Category Codecs
Status Unconfirmed
Assigned To No-one
Player type iPod 5G
Severity Low
Priority Normal
Reported Version current build
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Private No

Details

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 :

http://pixelcorps.cachefly.net/twip/twip_002_aud.m4a
http://pixelcorps.cachefly.net/twip/twip_003_aud.m4a
This task depends upon

Comment by Magnus Holmgren (learman) - Sunday, 02 March 2008, 14:26 GMT+2
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).

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