Re: Video Encoding Slowness

On Thu, 2011-12-29 at 19:58 +0000, Ken Moffat wrote:

>  I've never extracted vob files (for one thing, my current disks are
> too small - upgrading one machine is planned, but needs new hardware
> [ old via_sata doesn't do even sata2 ] and there's a shortage of my
> favourite cheap CPUs at the moment).

I'd rather not extract the vobs either, but I couldn't see a way of
getting ffmpeg to read directly from the DVD.

<snip interesting, but non-impatience-alleviating, background stuff>

>  I'm on a single AMD processor - intel are reputedly better for
> transcoding, and more CPUs always helps [ you might need to force the
> desired number of threads, or ffmpeg might do an adequate job out of
> the box ].

[This answers Alan's last question as well]. ffmpeg appeared to be
pegged to one core (99% CPU usage, and in multiple cpu mode it was
showing 1 core pretty much idle); I've added '-threads 2' to the command
given in my OP and that appears to have improved things.  `top` now
shows both cores being used, and the conversion is ticking along at
around 15fps.  That's still not what I naively expected, but given the
amount of work that has to be done it's understandable.

Thanks again,

Matt.

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