[MPlayer-users] Segmentation fault in pre5

[Stefan Sassenberg]

On Sat, Oct 16, 2004 at 06:06:50PM -0400, D Richard Felker III wrote:
> On Sat, Oct 16, 2004 at 08:33:26PM +0200, Stefan Sassenberg wrote:
> > On Fri, Oct 15, 2004 at 07:19:32PM -0700, Corey Hickey wrote:
> > > Stefan Sassenberg wrote:
> > > > Hello,
> > > > 
> > > > I frequently have segmentation faults when mencoding a movie.
> > > > Unfortunately this happens at different positions. I can provide some
> > > > information about this problem. I should add that I had other problems
> > > > of similar kind that I only solved by rebuilding mencoder with
> > > > ./configure --disable-mmx2 which I'm currently using.
> > > > 
> > > 
> > > Are you saying that it happens at a different position each time you try
> > > the same command on the same file? If so, then you probably have
> > > unstable hardware. I've found that mencoder is very intolerant of
> > > overclocking, probably from a combination of working the CPU very hard
> > > and the time it takes to encode.
> > > 
> > > If you are overclocking, try overclocking a little less; or, try cooling
> > > your CPU better.
> > > 
> > Correct. Just like the other problem I once had that I mentioned above.
> > I also thought about hardware problems, but mencoder is the only application
> > that shows errors like these and I'm not overclocking. Heat problems
> > might be the cause anyway.
> 
> anything that happens at a random location each time you run a program
> is _definitely_ heat-caused. mencoder doesn't read from /dev/urandom
> and pick what to do based on the results. the results of each run are
> entirely deterministic and won't vary from one to another.
> 
> anyway you probably need to clock down a _lot_! my experience has been
> that way before it starts crashing, mencoder will misencode video and
> put lots of bad artifacts in it if you've overclocked too much.
> overclocking is a very bad idea in general and if you're going to do
> it you should always try stuff again without overclocking before
> reporting problems as a bug...
> 
Richard, would you please be so kind and re-read what I wrote 15 lines
above: I'm not overclocking. And let me add: I've never been overclocking
and won't ever overclock. BTW, this doesn't mean I deny heat as the
cause for my problems.

And: I've been talking about a problem and described its symptoms. It's
up to you to call it a bug if it is one. I didn't.

Best regards

Stefan