[FFmpeg-user] Shrinking videos

Moritz Barsnick barsnick at gmx.net
Sun Nov 5 20:54:46 EET 2017

On Sun, Nov 05, 2017 at 12:59:24 +0100, Cecil Westerhof wrote:
> The most important thing is resizing the videos. I have to upload
> them. And with this script the size is between 1/8 and 1/12 of the
> original size.

Yeah, I do the same with recording from over-the-air TV, which have
massive bandwidth.

> Certainly: I do not see a difference.


> >>         -preset fast         \
> >
> > This, on the other hand, gives an advantage to conversion speed over
> > conversion size. It's a trade-off. If you need smaller size and have
> > plenty of time and CPU power to convert, use "-preset veryslow".
> That was what I first used. But it took just to much time, while the
> difference was not that great. I do not have to convert much often,
> but previous weekend I shot a lot of videos and even with this preset
> it took a lot of time. (I do some timings an share them later.)

Please share. I did the same once. It's really situation dependant.
Sometimes, I'm willing to save an extra 10 %. Other times, it doesn't
matter so much. I did a few short benchmarks with some arbitrary
material myself, just to have a feeling.

> But there are no glaring mistakes then? ;-)

If everything works fine for you: Nothing wrong!


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