Many crashes when rendering

[B.M.]

Wow, you've been absolutely right: with more swap space, everything rendered
fine last night :-)

Lesson learned: rendering 4K source clips to 4K needs more RAM then rendering
the same clips to QHD/2.5K...

Have a nice day,
Bernd


On Montag, 13. Mai 2024 19:28:52 CEST Evert Vorster wrote:
> I have 64Gb ram, and 100Gb swap file. 4K footage is big.
>
> I still don't know why Kdenlive can't just unload video clips it has not
> used in a while, or if there is memory pressure. Reading from swap is
> exactly as fast as reading the original from disk.
>
> On Mon, May 13, 2024, 17:42 B.M. <b-misc at gmx.ch> wrote:
> > Might be - I already had a swapfile of 8 GB size in place which I use when
> > rendering for many years. (RAM is 16 GB.) But: I used to render to QHD,
> > now
> > I'm rendering to 4K UHD, so maybe I need more swap space then before. I
> > just
> > added another 8 GB swapfile, will see if this helps!
> >
> > On Montag, 13. Mai 2024 18:22:01 CEST you wrote:
> > > Hi there!
> > >
> > > Keep an eye on memory usage when rendering. It may be that you are
> >
> > running
> >
> > > out of ram, and then Kdenlive falls victim to the oom killer. One way
> > > around it is to make a huge swap file and in this way never run out of
> > > memory
> > >
> > > On Mon, May 13, 2024, 17:07 B.M. <b-misc at gmx.ch> wrote:
> > > > Hi
> > > >
> > > > I'm currently trying to get a finished project out of kdenlive (latest
> > > > version,
> > > > appimage), and I see frequent crashes (without any reason for me).
> > > >
> > > > Basically, I split the project into several sequences and try
> > > > rendering
> > > > them
> > > > independently. Due to the crashes I started also rendering sequences
> > > > in
> > > > several parts (regions).
> > > >
> > > > The problem is:
> > > > With each crash I also loose my render queue. Which is really bad if
> > > > crashes
> > > > happen at night, loosing also hours of potential rendering... I mean,
> >
> > I'm
> >
> > > > trying to render about 1 h of 4K movie on a ~10 year old machine (1
> > > > fps...)
> > > >
> > > > In order to get rid of the "one kills all" dependency I'd like to use
> > > > render
> > > > scripts. But how is this possible (or is it possible at all) with an
> > > > kdenlive
> > > > appimage?
> > > >
> > > > Thanks for your help.
> > > >
> > > > Bernd


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