Stuttering at start of VBR MP3 playback

[Lewis Mackley]

Using Mixxx 1.7.2 on Windows (Tested on 7 and XP). At the beginning of a VBR mp3 track the playback stutters. Only happens for approx one second (just the first few notes). The rest of the track plays fine.

[Sean M. Pappalardo (pegasus-renegadetech)]

Can we possibly get you to test with Mixxx 1.8.0~beta2 which should be out within the week and see if this is still a problem?

[RJ Skerry-Ryan (rryan)]

Can you try 1.8.0? Get it from http://mixxx.org

[Lewis Mackley (lmackley)]

The problem still exists in 1.8.0. As I have said previously it only affects VBR playback. CBR is fine.

[Ray Thompson (raylas)]

v 1.9.0 Makes Some MP3 Files Ecoded In VBR Sutter At The Very Start Of The Track.

[RJ Skerry-Ryan (rryan)]

@ Ray Thompson -- are you working on fixing the bug or did you accidentally assign it to yourself?

[Ray Thompson (raylas)]

Hiya,
Sorry for the confusion, I was trying to report the bug as it still happens
with VBR MP3's in the latest version. It is very frustrating.

I have unsubscribed myself now from the Bug as you suggested.

Regards

Ray.

----- Original Message -----
From: "RJ Ryan" <email address hidden>
To: <email address hidden>
Sent: Saturday, April 16, 2011 7:36 PM
Subject: [Bug 580235] Re: Stuttering at start of VBR MP3 playback

@ Ray Thompson -- are you working on fixing the bug or did you
accidentally assign it to yourself?

--
You received this bug notification because you are a direct subscriber
of the bug.
https://bugs.launchpad.net/bugs/580235

Title:
  Stuttering at start of VBR MP3 playback

Status in Mixxx:
  Confirmed
Status in Mixxx 1.10 series:
  Confirmed
Status in Mixxx 1.7 series:
  Won't Fix
Status in Mixxx 1.9 series:
  Confirmed

Bug description:
  Using Mixxx 1.7.2 on Windows (Tested on 7 and XP). At the beginning
  of a VBR mp3 track the playback stutters. Only happens for approx one
  second (just the first few notes). The rest of the track plays fine.

To unsubscribe from this bug, go to:
https://bugs.launchpad.net/mixxx/+bug/580235/+subscribe

[RJ Skerry-Ryan (rryan)]

Oops I didn't mean you neede to unsubscribe -- feel free to stay subscribed if you want updates on us fixing the bug. If you check at the top where it says "Assigned to" it has your name -- that's what I was asking about. I'm assigning to myself now since I'm working on it.

Thanks!
RJ Ryan

[Eulin Guidry (epg72840)]

Using Mixxx 1.9, the stuttering starts after about 8 or 10 songs have been played, using auto dj or otherwise. After stuttering for about the length of one song, the stuttering stops, the starts again a little latter. I tried reloading the software with no remedy.
Thanks

[Waylon Robertson (wrobertson1981)]

Seems a file i have is VBR mp3, seeking within it, crashes mixxx's sound processing thread. UI still responds, but doesn't do anything. had to ctrl -c after exiting, to get the sound manager closed. mixxx 1.9 stable

[RJ Skerry-Ryan (rryan)]

I think I know what the fix for this would be, but I can't reproduce it anymore! Can someone please verify it is still a bug?

[RJ Skerry-Ryan (rryan)]

Nope -- the bug is alive and well.

[RJ Skerry-Ryan (rryan)]

I tried re-writing SSMP3 and it didn't fix the issue. Need to keep working on this, but won't be fixed in 1.10.0.

[Sean M. Pappalardo (pegasus-renegadetech)]

So is libmad at fault here or what?

[juan pablo garritano (tuny22)]

yes, when I'm streaming, at the beginning of a mp3 track (6, 7 sec approx) the playback stutters at the client side. I'm using Linux, Mixxx version 1.10.1

[RJ Skerry-Ryan (rryan)]

Still no progress. Punting to 1.11.1.

[Sean M. Pappalardo (pegasus-renegadetech)]

We need to determine if libmad is passing us faulty data so we can report this upstream if so.

[wideyes (tarunperkins)]

Still an issue in 1.11.1 under linux

[Daniel Schürmann (daschuer)]

This should be fixes in Master.
A possible reason is that the bit reservoir is empty.
Solution: We have started the decoder some frames earlier to fill the reservoir.

[Sean M. Pappalardo (pegasus-renegadetech)]

Still happening in 2.0 FWIW.

[Owen Williams (ywwg)]

not worth fixing in 2.0 (the fix in 2.1 is not backportable, since the fix is an entire rewrite of the decoder)

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/5391