[FFmpeg-user] -crf ignored

[Paul Gardiner]

On 01/06/2011 23:50, Phil Rhodes wrote:
> I have historically found it very difficult to make ffmpeg obey bitrate
> commands - it seems to encode at the rate it thinks it wants to encode
> and woe betide you if you want anything else.
>
> Presets can be tricky becuase many windows builds don't include them, if
> you can get them they're very difficult to edit because they have Unix
> linefeeds, and in any case I don't think I've ever once got a windows
> build of ffmpeg to read a preset - no matter how hard you try, it always
> seems to complain it can't find them, even when they're colocated with
> the executable or in the current directory or whatever. This is
> presumably an issue of directory resolution which has failed to port
> cleanly but if you're not on a Unix-like OS then that may be a problem
> for you.

Yeah I had trouble with ffmpeg presets (-vpre), but that wasn't
what Etienne suggested I use. He suggested -preset which seems to
map directly to x264 presets. Plus once I'd specified a preset,
my -crf flag was also honoured. I'm getting excellent results
now.

Cheers,
	Paul.