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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0007091||ardour||bugs||public||2016-11-02 14:57||2016-12-19 14:57|
|Priority||normal||Severity||minor||Reproducibility||have not tried|
|Status||resolved||Resolution||no change required|
|Platform||GNU/Linux AMD64||OS||Linux Mint||OS Version||18 MATE|
|Target Version||Fixed in Version|
|Summary||0007091: Session export doesn't start|
|Description||This is something I'm struggling with since Ardour 3.|
It tends to express itself in session that have more than exceed a certian level of complexity. Simple one-song projects seem to be unaffected at all. When mastering 4 songs in one session, it sometimes happens, but for project with 35+ tracks/busses and 80 minutes of material - this happens 90% of the time*
*The other 10% when the rendering actually starts - Ardour crashes somewhere in the middle (usually after rendering no more than 25% of the session.
So the issue is: after setting up the session export using Session > Export to Audio file(s). I press "Export" and Ardour does nothing. DSP load is at 100%, minutes go by, nothing happens. Ardour only creates an 88-byte WAV file.
I can Cancel the export, and get back to work. It's not crashing, or freezing. Just - the rendering never really happens.
|Steps To Reproduce||1. Create a really big session|
2. Configure exporting it to a file
3. Press "Export"
4. Wait forever or wait 'till it crashes, if it actually starts exporting
|Additional Information||I usually have to workaround this by recording output of my Master bus into a stereo track (watch out for feedback!).|
Problem is, Ardour also seems to have problems with jack_freewheel when working in big sessions, so I need to render 80 mintes in realtime.
Trying to enable jack_freewheel makes playback in Ardour freeze for a few minutes, and then it stops or glitches out or I give up waiting, kill it all, and restart the "Master recording" in realtime.
|Tags||No tags attached.|
I have also run into similar issues in the past in terms of exporting. For me they are usually related to either buggy plugins or running pulseaudio concurrently with jack. I don't know if either of these are relevant to your specific issues though.
The buggy plugins is a tough one to figure out. Someone with some knowledge of the code can take a look at any backtraces you attach here and may be able to tell you which specific plugins are the issue. Aside from that, a trial and error approach is the only thing I can think of. Here is a resource for capturing backtraces: https://ardour.org/debugging_ardour [^]
You also have the option of trying/using the ALSA backend for your exports.
There have been some changes to export recently and while they are probably unrelated to the issue you are experiencing I would appreciate if you could test a nightly build >= 5.5.33 and leave feedback if you get a chance.
Do you still experience these export issues if you use the ALSA audio backend?
Ok, I did some test.
I tried 3 different sessions, a few times - the exportnig never starts. I sometimes had to kill Ardour.
Nightly 5.5.72 (64 bit, GCC5):
Three session exported fine. No problems so far (but I'll need to give it some more time).
edited on: 2016-12-11 03:56
I have this problem as well (only when using JACK): in nightly 5.5.72 the progress bar appears but export does not start. These was no such problem in 5.5.
Just tried the older build 5.5.36 on a different machine with a PCI sound card and export goes fine there. I'll try more different configurations soon and report the results.
|I've found that the problem is caused by the latest jackd2 upgrade from the kxstudio repositories, the previous version (1.9.11~20160620) works fine, while the latest (1.9.11~20161209) messes the things up. Anyway, this is weird, as the realtime playback and recording works flawlessly, only export is getting stuck with qjackctl overloading the CPU.|
|Bugs when exporting using Jack2 need to be fixed by fixing Jack2.|
|2016-11-02 14:57||unfa||New Issue|
|2016-11-05 22:35||robsco||Note Added: 0018911|
|2016-12-05 23:03||timbyr||Note Added: 0019122|
|2016-12-05 23:03||timbyr||Status||new => feedback|
|2016-12-10 10:19||unfa||Note Added: 0019140|
|2016-12-10 10:19||unfa||Status||feedback => new|
|2016-12-11 03:52||efenstor||Note Added: 0019144|
|2016-12-11 03:56||efenstor||Note Edited: 0019144||View Revisions|
|2016-12-11 07:00||efenstor||Note Added: 0019145|
|2016-12-19 14:57||paul||Note Added: 0019185|
|2016-12-19 14:57||paul||Status||new => resolved|
|2016-12-19 14:57||paul||Resolution||open => no change required|
|2016-12-19 14:57||paul||Assigned To||=> paul|
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