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Rockbox

Tasklist

FS#9056 - AC3 playback does not work for single ripped songs

Attached to Project: Rockbox
Opened by Przemysław Hołubowski (p.h.) - Friday, 30 May 2008, 21:17 GMT
Task Type Bugs
Category Codecs
Status Unconfirmed
Assigned To No-one
Operating System All players
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 0
Private No

Details

RB does not play AC3 tracks which were extracted from DVD with splitting one-track/one-song (splitting by chapters).

In other words - if you extract single AC3 song RB will not be able to play it back, despite the fact foobar2000 and Winamp with AC3Filter plugin will play it fine.

It is not a problem related to extracting software as the problem occurs for AC3 files saved by DVD Audio Extractor and SmartRipper. (Files saved by them are bit-bit the same as file comparison showed).

Simulator does not display any debugging info when you try to play AC3 file which RB is unable to play.

AC3 playback is not completely broken because RB plays AC3 files if you extracted full AC3 track without splitting it.
This task depends upon

Comment by Mdkart (Mdkart) - Saturday, 28 June 2008, 12:21 GMT
Using delaycut on each ac3 file seems to fix the problem. But I can only admit that it would be better if Rockbox would support native split mp3s without using delaycut.
Comment by Mdkart (Mdkart) - Sunday, 29 June 2008, 13:33 GMT
No that's true. Split AC3's files doesn't work perfectly. I've tried to use delaycut or ac3fix but sometimes the player freeze and need to be restarted.
Comment by Mdkart (Mdkart) - Monday, 30 June 2008, 18:26 GMT
By the way, foo_ac3, the addon for foobar that permit to play ac3_in foobar is based also on liba52, wich is the same decoder used by rockbox.
So I think it would be possible to play AC3 split files in Rockbox, with some little modifiations (apps/codec/a52.c ?) since foobar can play it with foo_ava.
The point is that I don't know at all what modifications should be done.
Comment by UNHchabo (UNHchabo) - Sunday, 26 April 2009, 18:12 GMT
This issue still remains in r20794-090426.

When trying to play back an AC3 file ripped from a movie, Rockbox would always freeze if I attempted to jump to that item in a playlist, or if I was successfully playing the song, and restarted the player. Rockbox would boot up, resume play, and freeze.

Playback was successful some of the time if I was on the previous song, and skipped ahead, or allowed the playlist to choose the song, but this wasn't always the case.
Comment by MichaelGiacomelli (saratoga) - Sunday, 17 April 2011, 23:32 GMT
Could someone post a problem sample and confirm this hasn't been fixed?
Comment by MichaelGiacomelli (saratoga) - Monday, 18 April 2011, 15:19 GMT
Link to test file:

http://duke.edu/~mgg6/music/Title1%20-%20Chapter%2005.ac3

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