Scrubbing Timeline in VSE with Jack Audio doesn't scrub just plays the audio track #24051

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yellow .... · 2010-09-28T23:23:11+02:00

yellow .... commented

2010-09-28 23:23:11 +02:00

%%%Using Jack audio, an mp3 and scrubbing enabled doesn't scrub, it just continues the playing of the audio track. Dragging the play head back and forth repeatedly plays the track from where it's at, it doesn't even relate to the point on the time line of the audio.

Build Revision: 32105M from svn.

64bit Linux Maverick Merekat
FFMPEG from svn

USB Creative Audigy soundcard. 42msec latency.%%%

%%%Using Jack audio, an mp3 and scrubbing enabled doesn't scrub, it just continues the playing of the audio track. Dragging the play head back and forth repeatedly plays the track from where it's at, it doesn't even relate to the point on the time line of the audio. Build Revision: 32105M from svn. 64bit Linux Maverick Merekat FFMPEG from svn USB Creative Audigy soundcard. 42msec latency.%%%

yellow .... commented

2010-09-28 23:23:11 +02:00

Changed status to: 'Open'

yellow .... commented

2010-09-28 23:37:35 +02:00

%%%Scrubs much better cached :-)%%%

Nathan Letwory commented

2010-09-29 08:06:54 +02:00

%%%Assigning to our sound man.%%%

Joerg Mueller commented

2010-09-29 08:20:27 +02:00

%%%I bet it's the mp3 file! ffmpeg has problems with specific mp3 files with problematic headers so that it's unable to seek within the file. Could you please attach the problematic mp3 file, so that I can check?%%%

yellow .... commented

2010-09-30 22:15:02 +02:00

%%%hi

Link to file Windcatcher.mp3 download.

http://www.jamendo.com/en/album/49758

OpenAL scrubs the mp3 fine, but Jack can't.
%%%

%%%hi Link to file Windcatcher.mp3 download. http://www.jamendo.com/en/album/49758 OpenAL scrubs the mp3 fine, but Jack can't. %%%

Joerg Mueller commented

2010-09-30 22:48:52 +02:00

%%%Hmm, I'm sorry, looks like I didn't read the description precisely enough.

For me the file works perfectly.

Could you please try SDL as audio backend, SDL and Jack use the same software mixing code while OpenAL has its own, maybe that helps isolating the problem.%%%

%%%Hmm, I'm sorry, looks like I didn't read the description precisely enough. For me the file works perfectly. Could you please try SDL as audio backend, SDL and Jack use the same software mixing code while OpenAL has its own, maybe that helps isolating the problem.%%%

yellow .... commented

2010-10-01 11:06:28 +02:00

%%%Hi

No apologies necessary for misreading, really appreciate your work on blender sound system. :-)

SDL scrubs fine too.

I'm using jackdmp 1.9.6 on a dual Xeon processors workstation.

I get a couple of errors when starting jackd.

Cannot create thread 1 Operation not permitted
Cannot create thread 1 Operation not permitted

Have no idea if that relates to problem. Although Jack seems to work fine for Ardour etc.

Thanks%%%

%%%Hi No apologies necessary for misreading, really appreciate your work on blender sound system. :-) SDL scrubs fine too. I'm using jackdmp 1.9.6 on a dual Xeon processors workstation. I get a couple of errors when starting jackd. Cannot create thread 1 Operation not permitted Cannot create thread 1 Operation not permitted Have no idea if that relates to problem. Although Jack seems to work fine for Ardour etc. Thanks%%%

Joerg Mueller commented

2010-10-02 00:21:14 +02:00

%%%I think I could reproduce the problem! Do you have AV-sync on? With it I seem to have the same problem, will look into it.%%%