[FFmpeg-user] how to use presets files

[Tom Evans]

On Thu, Jul 11, 2013 at 12:01 PM, Phil Rhodes
<phil_rhodes at rocketmail.com> wrote:
> I'm sure I was told at one point that presets are no longer files, is this still true?
>
> P

ISTR that preset files still exist, but they only contain ffmpeg
specific options.

Encoding profiles used to be specified for things like h264, and you
would do that with -pre or -vpre. This was then changed to just pass
these values through to the encoding library itself, so with x264 for
instance you can pass through a profile, a preset and a tuning, with
-profile:v -preset:v and -tune:v.

Ie, you can still use -pre, but if you want to specify x264, profile
"main", preset "fast", then it is not "-vcodec x264 -vpre
x264-main-fast", it is "-c:v x264 -profile:v main -preset:v fast". You
can get the arguments for profile/preset/tune from the x264 binary
with --fullhelp.

Cheers

Tom