On Sat, Apr 11, 2015 at 8:00 AM, jb <j...@kdenlive.org> wrote:

> 2) When using GPU processing (Movit), I can reliably crash shotcut by doing
> the following:
> 1. Open shotcut
> 2. Click Open File to display a clip in monitor
> 3. repeat step 2. a few times leads to a crash with mention of a "corrupted
> double-linked list", see backtrace at the end of the mail.
>
> When trying to use shotcut's code in Kdenlive, I also encountered this
> crash.
> I could fix that crash by commenting out line 450 in src/glwidget.cpp:
>
> //self->stopGlsl();
>
> But I guess this hides another problem in MLT/Movit. Any idea on this one ?
>

This change is a cause of more concern. I observe a regression in this area
between Shotcut 14.12 and 15.01, but it seems to become worse (less
intermittent) from 15.02 to 15.03. I also notice that this problem does not
while working on a started playlist or timeline project or when video mode
is not automatic  - because mlt_consumer is not restarted. Technically,
what it is doing is correct to ensure GL resources are released on the
proper OpenGL context active on the current thread. There is a concern to
reuse GL resources created in one context in a new context or to free them
in a different context. I tried bisecting Shotcut and MLT repos to narrow
down the problem, but the intermittent nature of it between 14.12 and 15.01
makes it difficult. Also, it has been difficult to debug. I might just
comment and revisit it later.

I am curious what is your GPU and driver?

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